Papers - Komotori, Jun

Effect of Tensile Loading on the Residual Stress Relaxation Behavior of Induction Hardened SCM440 Steel with a Shallow Hardened Layer,

T. Aoki, M. Hayama, S. Takesue, A. Ezura, M.Tsukahara, Y.Misaka, S.Kikuchi, J.Komotori

ISIJ International 65 ( 2 ) 308 - 314 2025

Last author, Corresponding author, Accepted

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Regulating Cell Orientation Using a Femtosecond Laser-Induced Macro Stripe Design on Metallic Culture Surfaces with Laser-Treated and Mirrored Areas

C. Imashiro, A.Ezura, Takahiro G.Yamada, Y.Akiyama, J.Komotori

Advanced Biomedical Engineering 14 ( 2 ) 126 - 133 2025

Last author, Corresponding author, Accepted

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Estimation of residual stress relaxation in low alloy steel with different hardness during fatigue by in situ X-ray measurement

Hayama: M., Kikuchi S., Tsukahara M., Misaka Y., Komotori J.

International Journal of Fatigue (International Journal of Fatigue)  178 2024.01

ISSN  01421123

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In situ X-ray stress measurements were conducted to investigate the relaxation of compressive residual stress induced by fine particle peening during fatigue. To quantitatively assess the stability of the compressive residual stress, a concept of relaxation threshold stress was proposed. The relaxation threshold stress, which indicates the stability of the compressive residual stress, showed a direct correlation with specimen hardness. If the combined value of the compressive residual stress and compressive applied stress surpass the relaxation threshold stress, then the compressive residual stress relaxes. The relaxation threshold stress can be used to estimate the relaxation that occurs during fatigue.

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Change Behavior of Retained Austenite and Residual Stress on Carburized SCM420H Steel during Fatigue Process

M. Hayama, Y. Maki, S. Kikuchi, J. Komotori

ISIJ International 64 ( 3 ) 597 - 604 2024

Accepted

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Estimation of residual stress relaxation in low alloy steel with different hardness during fatigue by in situ X-ray measurement,

M．Hayama, S. Kikuchi, M. Tsukahara, Y. Misaka, J.Komotori,

International Journal of Fatigue 178 2024

Accepted

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Effect of surface characteristics on the axial fatigue properties and wear resistance of Ti-6Al-4V alloy nitrided by gas blow induction-heating

S. Takesue, R. Suyama, M. Hayama, Y. Koyanagi, Y. Misaka, J. Komotori

Engineering Failure Analysis (Engineering Failure Analysis)  157 ( 107933 )  2024

Accepted,  ISSN  13506307

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The effects of surface characteristics on the axial fatigue properties and wear resistance of the GBIH-nitrided titanium alloy were investigated to improve the fatigue strength and wear resistance of Ti-6Al-4V alloy rapidly nitrided by induction-heating in a nitrogen atmosphere with blowing nitrogen gas (GBIH-nitriding). The fatigue strength of the GBIH-nitrided Ti-6Al-4V alloy was lower than that of the mirror-polished specimen owing to the formation of a brittle nitrogen compound layer and grain coarsening. Fatigue tests using specimens prepared by combining GBIH-nitriding and particle collision treatments revealed that the formation of nitrogen diffusion layers at the outermost surface and the generation of compressive residual stress without forming surface asperities increased the fatigue strength of the GBIH-nitrided Ti-6Al-4V alloy. Moreover, the formation of a nitrided layer and suppression of surface asperities effectively improved the wear resistance of the Ti-6Al-4V alloy. Therefore, formation of a nitrogen diffusion layer and the introduction of compressive residual stress without grain coarsening, a compound layer, and surface asperities increased the fatigue strength and wear resistance of the GBIH-nitrided alloy.

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浅い表面焼入れ層を有するSCM440鋼の残留応力解放挙動に及ぼす引張負荷の影響

青木智史，羽山元晶，武末翔吾，江面篤志，塚原真宏，三阪佳孝，菊池将一，小茂鳥潤

鉄と鋼 110 ( 14 ) 1142 - 1149 2024

Accepted,  ISSN  00211575

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Fatigue tests under axial loading were conducted on steel with a shallow hardened layer induced by induction hardening, and in situ X-ray stress measurements were performed to investigate the relaxation of residual stresses during fatigue. The residual stresses were relaxed owing to tensile loading and not compressive loading. The two conditions that bring about this phenomenon are (i) a high peak of tensile residual stress just below the hardened layer, and (ii) the hardened layer coinciding with the compressive residual stress field that prevents the yielding of the compressive residual stress field under compressive loading. In this case, tensile yielding occurred just below the hardened layer under tensile loading, the residual stresses are redistributed, and the compressive residual stress on the material surface is relaxed. The experimental results also showed that the fatigue fracture morphology changed depending on the residual stress relaxation behavior.

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Rapid carburizing of low-alloy steel by atmospheric-controlled induction-heating fine-particle peening and investigation of its fatigue properties

Takesue S., Kasai D., Aoki T., Tsukahara M., Misaka Y., Komotori J.

Journal of Materials Research and Technology 33   2244 - 2251 2024

ISSN  22387854

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Atmospheric-controlled induction-heating fine-particle peening (AIH-FPP) was applied to low-alloy, low-carbon steel AISI 4120 to achieve rapid carburizing within minutes and enhance fatigue strength. The shot particles used during AIH-FPP were specifically created by mechanically milling a mixture of steel particles and carbon powders. The specimens were analyzed using laser microscopy, optical microscopy, X-ray diffraction for residual stress measurement, a micro-Vickers hardness tester, and an electron probe micro-analyzer. Axial fatigue tests and fracture surface analyses via scanning electron microscopy and energy-dispersive X-ray spectroscopy were also conducted. AIH-FPP effectively transferred carbon to the treated surface and facilitated its diffusion in a short period, creating a martensite layer with high hardness and compressive residual stress, which resulted in increased fatigue strength. The fatigue strength of the AIH-FPP-treated specimens was influenced by the conditions of reheating and quenching, which altered the prior austenitic grain size and stress concentration at the specimen surface. Notably, specimens treated with AIH-FPP followed by reheating and water-injection quenching exhibited fatigue strength comparable to that of conventional gas-carburized specimens, owing to the formation of a carburized layer with a small prior austenite grain size.

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Rapid carburizing of low-alloy steel by atmospheric-controlled induction-heating fine particle peening and investigation of its fatigue properties

S. Takesue, D. Kasai, T. Aoki, M. Tsukahara, Y. Misaka, J. Komotori,

Journal of Materials Research and Technology 33   2244 - 2251 2024

Accepted

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Development of AIH-FPP carburizing process using carbon powder

[1] G. Umeno, M. Hayama, S. Takesue, T. Tomita, T. Kato, Y. Misaka, J. Komotori

Materials Transactions 64 ( 2 ) 617 - 625 2023.01

Accepted

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Rapid formation of titanium nitride coating by atmospheric-controlled induction-heating fine particle peening and investigation of its wear and corrosion resistance

S．Takesue, T．Morita, Y．Misaka, J．Komotori

Results in Surfaces and Interfaces (Results in Surfaces and Interfaces)  11 2023

Accepted

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To create a coating of titanium nitride, atmospheric-controlled induction-heating fine particle peening using fine particles of pure titanium was conducted for low-alloy steel in a nitrogen atmosphere, and the surface characteristics of the treated specimens were investigated. The formation of hard titanium nitride coatings with a thickness of 100–200 μm was achieved by peening at 1373 K for 10 s and subsequent heating at 1373 K for 120 s. Titanium particles adhered to the treated surfaces during peening at the high temperature, which reacted with nitrogen in the atmosphere during the heating after peening. Ball-on-disk wear tests were conducted to examine the wear resistance of the specimens, and it was found that the created coating by AIH-FPP improved the wear resistance of low-alloy steel owing to its high hardness. The improvement was more significant at high testing temperatures because the high testing temperature and frictional heat caused oxygen in the air to react with titanium in the coating during the wear test. Immersion of the specimens into sodium chloride solution was also conducted to investigate the corrosion resistance, which revealed that the coating created improved corrosion resistance of low-alloy steel.

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Metallic Vessel with Mesh Culture Surface Fabricated Using Three-dimensional Printing Engineers Tissue Culture Environment

Imashiro C., Morikura T., Hayama M., Ezura A., Komotori J., Miyata S., Sakaguchi K., Shimizu T.

Biotechnology and Bioprocess Engineering (Biotechnology and Bioprocess Engineering)  28 ( 1 ) 181 - 191 2023

ISSN  12268372

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Various culture devices have been developed as fundamental technologies for facilitating bioengineering studies. Culture devices are designed to prepare specific culture environments. Thus, both macrostructures and surface micromorphology should be considered in the device design. Although fabricating devices with elaborate designs incurs high production costs, disposable materials are typically used for culture devices. However, some metallic materials are strong, stable, and biocompatible. Bioengineers have not applied these materials to culture devices because of the difficulty of processing. An emerging technology using three-dimensional (3D) printing has been developed, which can produce complex designs using metal. We demonstrate the applicability and potential of metal 3D printing for fabricating culture devices toward the development of the bioengineering discipline. As a specific example, we fabricated metallic culture devices where the environment of cultured tissues can be improved. One of the biggest factors determining the culture environment is active media supply. To attain active media supply to the tissue, devices having culture surfaces with mesh structures having holes far larger than cells were proposed. Cell sheets were cultured as tissue models, realizing tissue culture with such structures. The cultured tissue showed increased metabolism, indicating enhanced media supply owing to mesh surfaces. The biocompatibility of the 3D printed metal device was confirmed by viability assays on cultured cells, and reusability of the device was confirmed by mechanical and biochemical evaluations. We believe this study serves as a reference for using metallic 3D printing as an option for fabricating culture devices, which will promote bioengineering research.

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Titanium Culture Vessel Presenting Temperature Gradation for the Thermotolerance Estimation of Cells

Imashiro C., Jin Y., Hayama M., Yamada T.G., Funahashi A., Sakaguchi K., Umezu S., Komotori J.

Cyborg and Bionic Systems (Cyborg and Bionic Systems)  4 2023

ISSN  20971087

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Hyperthermia can be induced to exploit the thermal intolerance of cancer cells, which is worse than that of normal cells, as a potential noninvasive cancer treatment. To develop an effective hyperthermia treatment, thermal cytotoxicity of cells should be comprehensively investigated. However, to conduct such investigations, the culture temperature must be accurately regulated. We previously reported a culture system in which the culture temperature could be accurately regulated by employing metallic culture vessels. However, appropriate temperature conditions for hyperthermia depend on the cell species. Consequently, several experiments need to be conducted, which is a bottleneck of inducing hyperthermia. Hence, we developed a cell culture system with temperature gradation on a metallic culture surface. Michigan Cancer Foundation-7 cells and normal human dermal fibroblasts were used as cancer and normal cell models, respectively. Normal cells showed stronger thermal tolerance; this was because the novel system immediately exhibited a temperature gradation. Thus, the developed culture system can be used to investigate the optimum thermal conditions for effective hyperthermia treatment. Furthermore, as the reactions of cultured cells can be effectively assessed with the present results, further research involving the thermal stimulation of cells is possible.

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炭素粉末を用いたAIH-FPP浸炭プロセスの開発

梅野玄, 羽山元晶, 武末翔吾, 富田翼, 加藤健郎, 三阪佳孝, 小茂鳥潤,

材料 71 ( 9 ) 787 - 794 2022.09

Accepted

Evaluation of the compressive residual stress relaxation behavior by in situ X-ray stress measurement

M. Hayama, S. Kikuchi, J.Komotori

ISIJ International 62 ( 4 ) 758 - 765 2022.04

Titanium Culture Vessel Capable of Controlling Culture Temperature for Evaluation of Cell Thermotolerance

C.Imashiro, Y.Ida, S.Miyata, J.Komotori,

Materials Transactions (Materials Transactions)  63 ( 633 ) 373 - 378 2022.03

ISSN  13459678

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Surgery, radiation therapy, and chemical therapy have been reported as the main treatments for cancer, which is one of the deadliest reported diseases. However, because of the high invasiveness of patients, cancer hyperthermia has been studied as a non-invasive treatment. Hyperthermia uses a difference in thermal tolerance between normal and cancer cells and provides an affected part thermal stimulation to kill cancer cells selectively. To develop effective conditions for hyperthermia, an in vitro study to evaluate the thermal tolerance is required. However, because the existing cell culture vessels cannot control the culture temperature, genuine thermal tolerance of cells cannot be investigated appropriately. To reveal the critical temperature proper for hyperthermia, we developed a culture device controlling culture temperature. With the developed device, culture temperature was regulated considerably more quickly than the conventional method with the existing vessels, which enabled us to study the thermal tolerance of cells appropriately. For the control of culture temperature, the device has a titanium culture substrate, where a Peltier element is adhered. Because the biocompatibility of the device was confirmed, the difference in thermal tolerance between normal and cancer cells was investigated using the developed device as well as normal human dermal fibroblasts and Michigan Cancer Foundation-7 as model cell species. Therefore, it was confirmed that cancer cells were more sensitive to thermal stimulation than normal cells, which was qualitatively consistent with previous studies. Thus, our developed device can be used to investigate the thermal tolerance of each cell species, which will contribute to the development of cancer hyperthermia.

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Effect of room temperature fine particle peening pretreatment on grain refinement of Fe-Cr alloys by AIH-FPP

S. Takesue, S. Kikuchi, J.Komotori

Materials Transactions 63 ( 2 ) 203 - 208 2022

Accepted

Surface modification of titanium alloy via atmospheric pressure nitrogen plasma assisted femtosecond laser irradiation

Katahira K., Ezura A., Takesue S., Komotori J.

CIRP Annals (CIRP Annals)   2022

ISSN  00078506

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The effect of atmospheric pressure nitrogen plasma in conjunction with femtosecond laser surface modification of Ti–6Al–4V samples was investigated. It was suggested that the superior friction and wear characteristics of the LP series (the sample subjected to both laser and plasma irradiation) were induced by the synergistic combination of the following three factors: the increased smoothness induced by homogenizing the laser-induced periodic surface groove shape structure, the high hardness caused by grain refinement and the high toughness and low friction properties conferred to the sample by the formation of oxynitride.

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Effect of atmospheric-controlled induction-heating fine particle peening on microstructure and fatigue properties of low-alloy steel

Takesue S., Hayama M., Komotori J.

Fatigue and Fracture of Engineering Materials and Structures (Fatigue and Fracture of Engineering Materials and Structures)  45 ( 10 ) 2908 - 2919 2022

Accepted,  ISSN  8756758X

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Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) was performed for low-alloy steel, and the effects of the peening temperature, the microstructure of steel, and thermal history during AIH-FPP on the resultant microstructure of treated steel were investigated. Regardless of the prior microstructure and thermal history, the grains near the surfaces were refined by AIH-FPP at peening temperatures from 923 K to 1023 K owing to dynamic recrystallization. To examine the effect of AIH-FPP on the fatigue properties of steel, plane-bending fatigue tests were performed. Compared with the steel mirror-polished, treated with FPP at RT, or only induction-heated, the fatigue properties of steel treated with AIH-FPP were improved. This is because of the formation of a thick and uniform grain-refined layer, the generation of compressive residual stress, and hardening of the surface by AIH-FPP. Moreover, owing to the grain refinement progress, the fatigue properties of steel improved with increasing peening temperature.

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Development of AIH-FPP Carburizing Process Using Carbon Powder

Umeno G., Hayama M., Takesue S., Tomita T., Kato T., Misaka Y., Komotori J.

Zairyo/Journal of the Society of Materials Science, Japan (Zairyo/Journal of the Society of Materials Science, Japan)  71 ( 9 ) 787 - 794 2022

ISSN  05145163

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In this study, the surface of industrial pure iron was treated with atmospheric-controlled induction heating fine particle peening (AIH-FPP) using mechanical coating (MC) particles of carbon/steel obtained by mixing carbon powder and fine steel particles using mechanical milling. The surface modification effect and the mechanism of its effect were examined and considered by analyzing of the treated surface. Results showed that a modified layer in which carbon elements were diffused was formed near the treated surface by the AIH-FPP treatment using MC particles. In addition, by examining the influence of the treatment conditions on the formation of the modified layer by the design of experiments, the treatment temperature showed the most significant influence among the treatment temperature, peening time, and gas flow rate. The higher the treatment temperature, the deeper the carbon diffused layer. In addition, when treated at ≥1273 K, the microstructure near the surface became pearlite, and Vickers hardness increased. The time required for carbon diffusion in the AIH-FPP carburizing process using MC particles of carbon/steel was approximately the same as that of a general carburizing treatment using a reactive gas. In the AIH-FPP carburizing process, carbon is considered to be transferred from the particles to the surface, and the grain boundaries and dislocations increased by fine particle preening (FPP) are used as channels to diffuse inside the specimen. This mechanism is entirely different from the conventional carburizing methods.

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Effect of Room Temperature Fine Particle Peening Pretreatment on Grain Refinement of Fe–Cr Alloys by AIH-FPP

Takesue S., Kikuchi S., Komotori J.

Materials Transactions (Materials Transactions)  63 ( 2 ) 203 - 208 2022

ISSN  13459678

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Fine particle peening (FPP) at room temperature was introduced to create finer grains at the surfaces of Fe–Cr alloys that were then treated by atmospheric controlled induction heating FPP (AIH-FPP). The effect of the proposed treatment on the grain refinement behavior of the alloys was investigated using optical microscopy and micro-Vickers hardness testing. The FPP pretreatment at room temperature increased the effectiveness of the grain refinement via dynamic recrystallization during subsequent AIH-FPP. Grain refinement at the surface of Fe–Cr alloys progressed with an increase in the cycles of the treatment. The addition of Cr in Fe–Cr alloys promotes the formation of fine grains during the treatment. Specimens with fine grains created via static recrystallization were also prepared and compared to grains formed via dynamic recrystallization by the room temperature FPP pretreatment and subsequent AIH-FPP to evaluate the effectiveness of the proposed treatment. The grains formed through dynamic recrystallization by the proposed treatment were finer than those formed through static recrystallization. These results indicate that the proposed combination of room temperature FPP and AIH-FPP is effective for the formation of fine grains at the surfaces of Fe–Cr alloys.

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Surface modification of titanium alloy via atmospheric pressure nitrogen plasma assisted femtosecond laser irradiation

K.Katahira, A. Ezura, S.Takeue, J.Komotori

CIRP Annals – Manufacturing, 71   469 - 472 2022

Accepted

Effect of atmospheric-controlled induction-heating fine particle peening on wear resistance and fatigue properties of maraging steel fabricated by laser powder-bed fusion

S. Takesue, A. Ezura, Y. Maki, M. Hayama, Y. Misaka, J. Komotori

ournal of Materials Research and Technology (Journal of Materials Research and Technology)  21   373 - 387 2022

Accepted,  ISSN  22387854

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Maraging steel components fabricated by laser powder-bed fusion, which is a technique of additive manufacturing, are expected to be used widely because of their high strength, hardness and toughness. To apply maraging steel manufactured by laser powder-bed fusion in wider industrial fields and prevent the components from fracture, a study was conducted to improve the wear resistance and fatigue properties of the steel by an atmospheric-controlled induction-heating fine particle peening surface modification technique. The technique developed can create hard intermetallic compound layers and introduce peening effects, which are expected to improve the wear resistance and fatigue properties of maraging steel fabricated by laser powder-bed fusion. The prepared specimens were examined using optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, laser microscopy, X-ray diffraction, micro-Vickers hardness testing, nano-indentation testing, reciprocating ball-on-disk wear tests and axial fatigue tests. It was revealed that atmospheric-controlled induction-heating fine particle peening using mechanically milled particles formed Fe-Al intermetallic compound layers with high hardness, introduced compressive residual stresses and increased the hardness of the maraging steel substrate owing to age hardening. In conclusion, atmospheric-controlled induction-heating fine particle peening can simultaneously improve the wear resistance and fatigue properties of maraging steel fabricated by laser powder-bed fusion within a few minutes. These achievements can expand applications of maraging steel fabricated by laser powder-bed fusion.

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Change Behavior of Retained Austenite and Residual Stress on Carburized SCM420H Steel during Fatigue Process

羽山元晶，牧悠介， 菊池将一，小茂鳥潤

鉄と鋼 108 ( 11 ) 891 - 899 2022

Last author

Development of accurate temperature regulation culture system with metallic culture vessel demonstrates different thermal cytotoxicity in cancer and normal cells

C.Imashiro, H.Takeshita, T.Morikura, S.Miyata, K.Takemura, J.Komotori

Scientific Reports (Scientific Reports)  11 ( 21466 )  2021.11

Accepted

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Hyperthermia has been studied as a noninvasive cancer treatment. Cancer cells show stronger thermal cytotoxicity than normal cells, which is exploited in hyperthermia. However, the absence of methods evaluating the thermal cytotoxicity in cells prevents the development of hyperthermia. To investigate the thermal cytotoxicity, culture temperature should be regulated. We, thus, developed a culture system regulating culture temperature immediately and accurately by employing metallic culture vessels. Michigan Cancer Foundation-7 cells and normal human dermal fibroblasts were used for models of cancer and normal cells. The findings showed cancer cells showed stronger thermal cytotoxicity than normal cells, which is quantitatively different from previous reports. This difference might be due to regulated culture temperature. The thermal stimulus condition (43 °C/30 min) was, further, focused for assays. The mRNA expression involving apoptosis changed dramatically in cancer cells, indicating the strong apoptotic trend. In contrast, the mRNA expression of heat shock protein (HSP) of normal cells upon the thermal stimulus was stronger than cancer cells. Furthermore, exclusively in normal cells, HSP localization to nucleus was confirmed. These movement of HSP confer thermotolerance to cells, which is consistent with the different thermal cytotoxicity between cancer and normal cells. In summary, our developed system can be used to develop hyperthermia treatment.

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Effects of particle collision treatments on fatigue strength of Ti-6Al-4V alloy with polishing marks

T.Morita, A.Miyatani, S.Takesue, M.Kumagai, J.Komotori

Materials Transactions (Zairyo/Journal of the Society of Materials Science, Japan)  62 ( 9 ) 1298 - 1303 2021.09

Accepted,  ISSN  05145163

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In this study, we attempted to nullify the harmful influences of processing marks on the fatigue strength of Ti-6Al-4V alloy by particle collision treatments. As the surface treatments, fine particle bombarding (FPB) and shot peening (SP) were applied to form hardened layers and introduce compressive residual stress. The surface of the objective material was polished to a mirror surface to eliminate the influences of machining on specimens and was then grinded with emery papers (#80) to make uniform processing marks. After the particle collision treatments, the surface conditions, hardness distributions and residual stress were systematically examined, and their relationships with the fatigue strength were considered in detail. On observation of the surfaces, the processing marks were eliminated by the particle collision treatments. At the same time, the surface hardness was increased and high compressive residual stress was introduced. As a result, the fatigue strength was markedly improved by the treatments beyond the level of the material with the processing marks without deterioration of the mechanical properties. The improvement rates of the fatigue strength were high, at 75% by FPB treatment and 58% by SP treatment.

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細胞の熱耐性の検討に資する温度制御可能なチタン製培養装置の開発

今城哉裕，井田雄太，宮田昌悟，小茂鳥潤

材料 70 ( 6 ) 479 - 485 2021.06

Accepted

Formation of Fe-Al intermetallic compound layer by AIH-FPP and its effect on tribological properties of stainless steel

Shogo TAKESUE, Yoshitaka MISAKA, Jun KOMOTORI

ISIJ International (ISIJ International)  61 ( 6 ) 1946 - 1954 2021.06

Accepted,  ISSN  09151559

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In order to increase the surface hardness and improve the tribological properties of stainless steel, Fe–Al intermetallic compound layers were created by atmospheric-controlled induction-heating fine particle peening (AIH-FPP). The surface microstructure of the stainless steel treated with AIH-FPP was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, and micro-Vickers hardness testing. In addition, the tribological properties were investigated by reciprocating ball-on-disk wear tests. When high-speed steel particles coated with thin aluminum layers were used as the shot particles, Fe–Al intermetallic compound layers were formed at the surfaces of the stainless steel with increased heating time during AIH-FPP. This is because aluminum was transferred from the shot particles, and the temperature at the treated surface increased as a result of a combustion synthesis reaction. When the heating temperature after FPP was increased, the transferred aluminum and nitrogen in the atmosphere reacted, which resulted in the formation of aluminum nitrides in addition to Fe–Al intermetallic compounds. The tribological properties of the stainless steel were improved by AIH-FPP since high-hardness layers were created. The results indicate that the formation of an Fe–Al intermetallic compound layer with high hardness by AIH-FPP is effective for modifying the tribological properties of the stainless steel within a relatively short span of time.

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Rapid oxynitriding of Ti-6Al-4V alloy by induction heating in air

Kazuki Tamura, Shogo Takesue, Tatsuro Morita, Elia Marin, Jun Komotori, Yoshitaka Misaka, Masao Kumagai

Materials Transactions (Materials Transactions)  62 ( 1 ) 111 - 117 2021

Accepted,  ISSN  13459678

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In this study, a rapid oxynitriding technique based on induction-heating was developed for the titanium alloy Ti6Al4V, and its effects on surface characteristics of the alloy were investigated. The surface microstructures of the alloy were characterized by employing a scanning electron microscope, electron back-scatter diffraction, X-ray diffraction and nano-indentation tests. Induction-heating in air for 60 s caused the formation of a hardened layer on the Ti6Al4V alloy surface, which can be attributed to the diffusion of oxygen and nitrogen atoms. When water quenching was performed after heating, transformation to an acicular martensitic ¡A phase occurred, resulting in increased in substrate hardness. However, cracks were initiated at the surface of the oxynitrided alloy. The cracks were eliminated through fine particle bombarding treatment, whereas the hardened layer formed by the oxynitriding treatment remained. The obtained results thus indicate that the oxynitriding technique developed in this study can enhance the wear resistance and tensile strength of the Ti6Al4V alloy within a short period of time.

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Evaluation of the Compressive Residual Stress Relaxation Behavior by in situ X-ray Stress Measurement

羽山元晶，菊池将一，小茂鳥潤

鉄と鋼 107 ( 2 ) 137 - 145 2021

Accepted

Combined effect of gas blow induction heating nitriding and post-treatment with fine particle peening on surface properties and wear resistance of titanium alloy

S.Takesue, S.Kikuchi, Y.Misaka, T.Morita, J.Komotori

Materials Transactions (Materials Transactions)  62 ( 10 ) 1502 - 1509 2021

Accepted,  ISSN  13459678

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In order to fabricate a titanium alloy with superior wear resistance and fatigue strength, fine particle peening (FPP) was introduced as a post-treatment after gas blow induction heating (GBIH) nitriding. The surface characteristics of the treated alloy were examined using X-ray diffraction, scanning electron microscopy, laser microscopy and a micro-Vickers hardness tester. GBIH nitriding and post-treatment with FPP formed nitrided layers with high hardness and compressive residual stress at the surface of the alloy within a short period of time. This is due to the diffusion of nitrogen atoms during GBIH nitriding and plastic deformation of the surface layer during FPP. Reciprocating ball-on-disk wear tests were performed to investigate the wear resistance of the surface-treated alloy. The wear resistance of the titanium alloy was improved by the proposed surface treatment compared with samples that were only polished or FPP-treated. This is due to the presence of a nitrogen compound layer with high hardness at the surface. The abrasiveness toward the wear test counter material was also decreased by the combined surface treatment.

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研磨痕を有するTi-6Al-4V合金の疲労強度に及ぼす粒子衝突処理の効果

森田辰郎，宮谷厚志，武末翔吾，熊谷正夫，小茂鳥潤

材料 69 ( 12 ) 915 - 920 2020.12

Accepted

Rapid nitriding mechanism of titanium alloy by gas blow induction heating

S. Takesue, S．Kikuchi，Y．Misaka，T．Morita，J．Komotori

Surface and Coatings Technology (Surface and Coatings Technology)  399 2020.10

Joint Work, Accepted,  ISSN  02578972

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This work characterized the surface-modified layers generated on a titanium alloy during gas blow induction heating (GBIH), so as to elucidate the rapid nitriding mechanism. The surface microstructures of GBIH nitrided specimens were analyzed by X-ray diffraction, micro-Vickers hardness testing, scanning electron microscopy and X-ray photoelectron spectroscopy. The data indicate that applying this process for only several minutes can forms nitrided layers on Ti-6Al-4V alloy surfaces, the characteristics of which are similar to those of layers produced by ordinary gas nitriding for several hours. The temperature inside the material was determined to be higher than that on the surface during GBIH nitriding. However, the thickness of the nitrided layer exceeded the estimated value based on the diffusion coefficient at this high internal temperature. This especially thick nitrided layer can possibly be attributed to eddy currents generated in the metal by the application of a high-frequency current. Passivation films on the surface of the Ti-6Al-4V alloy were found to be removed during GBIH nitriding, which is ascribed to the diffusion of oxygen atoms in the passivation film into the substrate. Thus, the data show that GBIH nitriding is able to modify a Ti-6Al-4V alloy within a short period of time based on the effect of an eddy current and the disappearance of the passivation film.

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Rapid oxynitriding of Ti-6Al-4V alloy by induction heating in air

Tamura K., Takesue S., Morita T., Marin E., Komotori J., Misaka Y., Kumagai M.

Zairyo/Journal of the Society of Materials Science, Japan (Zairyo/Journal of the Society of Materials Science, Japan)  69 ( 8 ) 605 - 611 2020.08

ISSN  05145163

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© 2020 Society of Materials Science Japan. All rights reserved. In this study, a rapid oxynitriding technique based on induction heating was developed for the titanium alloy Ti-6Al-4V, and its effects on surface characteristics of the alloy were investigated. The surface microstructures of the alloy were characterized by employing a scanning electron microscope, electron back-scatter diffraction, X-ray diffraction and nano-indentation tests. Induction-heating in air for 60 s caused the formation of a hardened layer on the Ti-6Al-4V alloy surface, which can be attributed to the diffusion of oxygen and nitrogen atoms. When water quenching was performed after heating, transformation to an acicular martensitic α’ phase occurred, resulting in increased in substrate hardness. However, cracks were initiated at the surface of the oxynitrided alloy. The cracks were eliminated through fine particle bombarding treatment, whereas the hardened layer formed by the oxynitriding treatment remained. The obtained results thus indicate that the oxynitriding technique developed in this study can enhance the wear resistance and tensile strength of the Ti-6Al-4V alloy within a short period of time.

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AIH-FPPシステムを用いた投射粒子成分の移着と拡散による金属間化合物の創成

武末翔吾，渡邊一敬，三阪佳孝，小茂鳥潤

砥粒加工学会誌 64 ( 8 ) 421 - 427 2020.08

Influences of particle collision treatments on surface characteristics and fatigue strength of Ti-6Al-4V alloy

T. Morita, A. Miyatani, S. Kariya, M. Kumagai, S. Takesue, J. Komotori

Results in Materials (Results in Materials)  7 2020.08

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In this study, the particle collision treatments (fine particle bombarding (FPB) and conventional shot peening (SP)) were performed for Ti–6Al–4V alloy in order to comprehensively investigate the influences of their treatment conditions on the surface conditions, microstructures, hardness distributions and residual stress. Moreover, we examined the relationship between the surface characteristics of the treated materials and their mechanical properties including fatigue strength in detail. According to the obtained experimental results, the values of the maximum height waviness increased with increasing in the size of collision particles and injection pressure. Among all the treated materials, the differences in hardness distribution were relatively small because the work hardening exponent of Ti–6Al–4V alloy is low and the degree of work hardening is insensitive to the amount of plastic deformation. The absolute values of compressive residual stress generated at the surfaces became higher when finer particles were used as collision particles. The increase in injection pressure increased the surface temperature and released the introduced residual stress. As the particle collision treatments affected only the surface regions, the mechanical properties of the treated materials were almost the same as those of the annealed one. In the range of the conditions examined in this study, the most effective treatment to improve the fatigue strength of Ti–6Al–4V alloy was FPB under a relatively low injection pressure. This was because the value of the maximum height waviness was the smallest and the highest compressive residual stress was introduced at the same time.

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Characterization of surface layer formed by gas blow induction heating nitriding at different temperatures and its effect on the fatigue properties of titanium alloy

S. Takesue, S. Kikuchi, H. Akebono, T. Morita, J. Komotori

Results in Materials (Results in Materials)  5 2020

Research paper (scientific journal), Joint Work

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Gas blow induction heating (GBIH) nitriding was carried out for Ti–6Al–4V alloy at different temperatures, and its effect on surface characteristics, wear resistance and fatigue properties was investigated. The microstructures of the specimen surface were characterized using optical microscopy, laser microscopy, X-ray diffraction, micro-Vickers hardness tester, and nano-indentation tester. It was found that the surface characteristics of titanium alloy varied with increasing the treatment temperature of GBIH-nitriding. In this study, a nitrogen diffusion layer was formed on the titanium alloy surface GBIH-nitrided at 1073 ​K. A nitrogen compound layer and diffusion layer were created at the treatment temperature of 1173 ​K, which suppressed the wear loss to under one tenth that of the substrate. In order to examine the fatigue properties of the treated alloy, fatigue tests under four-point bending were performed. The fatigue strength of the Ti–6Al–4V alloy GBIH-nitrided at 1173 ​K was 234 ​MPa lower than that of the mirror-polished alloy. The decrease in the fatigue strength is due to the formation of the compound layer with a Young's modulus approximately twice that of the substrate, and the grain coarsening from 7 ​μm to 300 ​μm. The results indicate that a thick nitrided layer with high hardness and the close Young's modulus to the substrate improved the fatigue strength of the Ti–6Al–4V alloy.

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Generation of Biocompatible Titanium Alloy Surfaces Including Calcium and Phosphorus Elements by Laser-Induced Mist Spraying Wet Treatment

A. Ezura, K. Katahira, J. Komotori

Int. J. of Automation Technology (International Journal of Automation Technology)  14 ( 4 ) 575 - 581 2020

ISSN  18817629

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© 2020, Fuji Technology Press. All rights reserved. Titanium alloys are widely used for the hard tissue substitute implants. However, it is necessary to improve interfacial biocompatibility to reduce adhesion period. For improvement of biocompatibility of Ti-6Al-4V ELI alloys, texture and chemical composition on contact part with biological tissue play very important roles. In this research, micro texture was generated on the Ti-6Al-4V ELI alloy surfaces utilizing laser irradiation, in order to improve biocompatibility. The biocompatibility was evaluated by osteoblast cell culture assays. The results indicated the surface having micro texture improve biocompatibility as com-pared with untreated surface. This was considered in order the fact that the formed modified surface had hydrophilicity, thereby improving the cell compatibility, and the cell adhesion due to the complicated shape. In addition, mist of glycerophosphoric acid calcium aqueous solution was applied on the laser irradiated area. As result, micro texture including Ca and P elements was generated on the Ti-6Al-4V ELI alloy surfaces. When laser was irradiated, glycerophosphoric acid calcium aqueous solution was applied as mist flowed on the test pieces as droplet. The velocity of droplet fluid was relatively fast, so that laser irradiation was unhindered access to the surface of test pieces and the treatment was stable. In order to estimate biocompatibility, culture assays using osteoblast cells were conducted on the treated surface having micro texture including Ca and P elements. As results, it was clearly that biocompatibility of the specimen treated by laser with glycerophosphoric acid calcium aqueous solution mist more improved than either untreated specimen or treated specimen soaked in glycerophos-phoric acid calcium aqueous solution.

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大気中での高周波誘導加熱によるTi-6Al-4V合金の高速酸窒化処理

田村和暉，武末翔吾， 森田辰郎，Elia Marin， 小茂鳥潤，三阪佳孝， 熊谷正夫

材料 69 ( 8 ) 605 - 611 2020

Generation of micro texture including calcium and phosphorus elements on titanium alloy for improvement of biocompatibility with laser induced mist surface treatment

Ezura A., Katahira K., Komotori J.

JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020 (JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020)   2020

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Titanium alloys are widely used for the hard tissue substitute implants. However, it is necessary to improve interfacial biocompatibility for reduce adhesion period. For improvement of biocompatibility of titanium alloys, texture and chemical composition on contact part with biological tissue play very important roles. In this research, mist of glycerophosphoric acid calcium aqueous solution was applied on the laser irradiated area. As result, micro texture including Ca and P elements was generated on the Ti-6Al-4V-ELI alloys surfaces. When laser was irradiated, glycerophosphoric acid calcium aqueous solution applied as mist flowed on the test pieces as droplet. The velocity of droplet fluid was relatively fast, so that laser irradiation was unhindered access to the surface of specimens and the treatment was stable. In order to estimate biocompatibility of treated surfaces having micro texture with Ca and P element, culture assays using osteoblast cells were conducted. As result, it was clearly that biocompatibility of the specimen treated by laser with glycerophosphoric acid calcium aqueous solution mist more improved than treated specimen soaked in glycerophosphoric acid calcium aqueous solution.

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Effect of pre-treatment with fine particle peening on surface properties and wear resistance of gas blow induction heating nitrided titanium alloy

S. Takesue, S. Kikuchi, H. Akebono, Y. Misaka, J. Komotori

Surface and Coatings Technology (Surface and Coatings Technology)  359   476 - 484 2019

Research paper (scientific journal), Joint Work,  ISSN  02578972

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© 2018 Elsevier B.V. In order to develop a rapid nitriding process for titanium alloy at a low temperature, fine particle peening (FPP) was performed prior to gas blow induction heating (GBIH) nitriding. The surface microstructures of a Ti-6Al-4V alloy treated by FPP and GBIH nitriding were characterized using X-ray diffraction, optical microscopy, scanning electron microscopy, laser microscopy and micro-Vickers hardness testing. The results indicate that nitrogen diffusion into titanium during GBIH nitriding was accelerated by the pre-treatment with FPP, and a nitrided layer was formed on the surface of the Ti-6Al-4V alloy at a relatively low temperature (923 K), which grain coarsening and phase transformation did not occur and a nitrided layer was not formed only by GBIH nitriding. This is because a fine-grained surface layer was generated by the pre-treatment with FPP. Reciprocating ball-on-disk wear tests were carried out to examine the wear resistance of the prepared specimens. GBIH nitriding at a low temperature improved the wear resistance of the Ti-6Al-4V alloy following the pre-treatment with FPP, due to the formation of a hard nitrogen compound layer at the surface. The results show that the proposed surface treatment process was effective at modifying the surface properties of a titanium alloy at a low temperature and within a short span of time while avoiding grain coarsening and phase transformation.

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Effect of hydroxy groups and microtopography generated by a nanosecond-pulsed laser on pure Ti surfaces

Y. Kurashina, A. Ezura, R. Murakami, M. Mizutani, J. Komotori

Journal of Materials Science: Materials in Medicine (Journal of Materials Science: Materials in Medicine)  30 ( 5 )  2019

Research paper (scientific journal), Joint Work,  ISSN  09574530

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© 2019, Springer Science+Business Media, LLC, part of Springer Nature. In this paper, we study a process for modifying the surface microtopography of the Ti oxide layer using a nanosecond-pulsed laser (NPL). Even now, the mechanism by which hydroxyl groups are generated on the titanium surface treated by NPL is not clear. Hence, we evaluated the surface properties of the NPL defocus distances on pure titanium surfaces, and investigated the relationship between the generation of hydroxyapatites/cell viability and the titanium surface characteristics. The NPL defocus distance was varied from 0 to 4 mm. Defocus distances of 0 and 2 mm generated microtopographical features on the titanium surface, and the resulting surfaces exhibited a greater density of OH groups than the surface treated with a defocus distance of 4 mm. The surfaces treated using defocus distances of 0 and 2 mm were found to be coated with microspherical hydroxyapatite composed of coexisting plate- and needle-like crystals after immersion in simulated body fluid, and alkaline phosphatase activity assays indicated improved cell compatibility. The improvements in biocompatibility and cell compatibility were due to the pocket-like microtopographical structures formed along the processing trace. These pockets contained a large amount of OH groups, and promoted the growth of hydroxyapatite. [Figure not available: see fulltext.].

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Functionalisation of titanium alloy surface through oxygen gas jet-assisted gliding arc discharge plasma

K. Katahira, N. Mifune, J. Komotori

CIRP Annals - Manufacturing Technology (CIRP Annals)  69 ( 1 ) 201 - 204 2019

Research paper (scientific journal),  ISSN  00078506

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© 2019 A modified surface layer was fabricated on Ti–6Al–4V samples by gliding arc discharge plasma assisted with an oxygen jet gas under atmospheric conditions. The oxidation reaction on the sample surface was promoted by active species with strong oxidising performance, such as oxygen and hydroxyl radicals. An amorphous titanium oxide layer was detected on the generated surface. The oxygen diffusion layer penetrated the substrate to an approximate depth of 500 nm. The generated surface exhibited higher biological cell adhesiveness and a lower elution amount of metal ions than the untreated sample surface.

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Rapid surface nitriding of titanium alloy by a nanosecond fiber laser under atmospheric conditions

Katahira K., Tanida Y., Takesue S., Komotori J.

CIRP Annals (CIRP Annals)  67 ( 1 ) 563 - 566 2018.01

ISSN  00078506

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© 2018 CIRP A modified surface layer using a Yb nanosecond fiber laser beam under atmospheric conditions was fabricated by applying a surface nitriding process on disc-shaped Ti–6Al–4V samples. On the generated surface, a melt layer comprising a TiN dendrite structure and a heat affected zone containing a needle-like α phase were detected. The modified layer exhibited optimal characteristics with the treatment at a laser output power of 12 W, resulting in a hardness of 12 GPa. The results of friction wear evaluation tests revealed that the layer exhibited superior abrasion resistance compared with an untreated Ti–6Al–4V substrate.

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Effect of atmospheric-controlled induction-heating fine particle peening on electrochemical characteristics of austenitic stainless steel

K.Kikuchi, S.Iwamae, H.Akebono, J.Komotori, K.Kadota

Surface and Coatings Technology (Surface and Coatings Technology)  334   189 - 195 2018

Research paper (scientific journal), Joint Work,  ISSN  02578972

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© 2017 Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) using Cr and Mo shot particles in a N2 atmosphere was introduced to improve the electrochemical characteristics of AISI 316 austenitic stainless steel. The surface microstructure of the AIH-FPP-treated specimen was characterized using scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX). AIH-FPP can be used to form transferred and diffused layers of shot particles on the surface of austenitic stainless steel. The thickness of the diffusion layers of Cr shot particles tended to increase with the heating time in the AIH-FPP process, whereas the Cr concentration at the surface tended to decrease. Electrochemical polarization tests were performed in 3 wt% NaCl + H2SO4 and 20 wt% NaCl environments at 343 K using a three-electrode electrochemical cell connected to a computer driven potentiostat to examine the corrosion resistance of austenitic stainless steel treated with AIH-FPP. The pitting potential of the AIH-FPP-treated specimen was higher than that of the untreated specimen. In particular, there was clear improvement in the pitting potential of austenitic stainless steel by AIH-FPP with Cr shot particles following peening with Mo shot particles. AIH-FPP using Cr and Mo shot particles in a N2 atmosphere is an effective method of improving the electrochemical characteristics of austenitic stainless steel.

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Ti合金にAIH-FPP（雰囲気制御高周波誘導加熱微粒子ピーニング）を用いて創成した金属間化合物被膜の表面特性

武末翔吾，齋藤周也，小茂鳥潤，三阪佳孝，川嵜一博

熱処理 58 ( 1 ) 11 - 16 2018

Research paper (scientific journal), Joint Work

Effect of Cr Diffused Layer Formed by AIH-FPP Treatment on Adhesion of DLC Films to a Carbon Steel Substrate

S. Takesue, H. Akebono, M. Furukawa, S. Kikuchi, J. Komotori, H. Nomura

Materials Transactions (Materials Transactions)  59 ( 4 ) 642 - 647 2018

Research paper (scientific journal), Joint Work,  ISSN  13459678

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© 2018 The Japan Institute of Metals and Materials. In this study, a diffusion layer of Cr was formed on the surface of a carbon steel by atmospheric-controlled induction heating fine particle peening (AIH-FPP) treatment, followed by coating of a diamond-like carbon (DLC) film in an attempt to provide a less expensive and facile method for the production of DLC-coated steels with superior adhesion to conventional methods. Frictional wear tests and indentation tests with Vickers indenter were conducted on these DLC-coated steel specimens, and adhesion to the substrate was investigated experimentally. It was revealed that the formation of a Cr diffused layer on the surface of the substrate by AIH-FPP treatment significantly improved the adhesion of the DLC film to the substrate under a sliding load and a large plastic deformation. In addition, frictional wear tests revealed that the thickness of the Cr diffused layer formed by AIH-FPP treatment has a significant influence on the adhesion of the DLC film to the substrate. A thicker Cr diffused layer with a thickness of about 100 µm imparted better adhesion of the DLC film to the base material, and the superior friction and wear characteristics of the DLC film were sustained up to 49000 wear cycles while the specimens with a Cr diffused layer thickness of about 40 µm and without a Cr diffused layer maintained low friction coefficients up to 36000 and 8000 wear cycles, respectively. These results suggest that the proposed film forming method with a Cr diffused layer formed by AIH-FPP treatment is superior to the conventional method and is very efficient as a technique to improve the adhesion of DLC films to a carbon steel substrate.

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Dynamic recrystallization of Fe-Cr alloys by atmospheric-controlled induction-heating fine particle peening

S. Kikuchi, I. Tanaka, S. Takesue, J. Komotori, K. Matsumoto

Surface and Coatings Technology (Surface and Coatings Technology)  344   410 - 417 2018

Research paper (scientific journal), Joint Work,  ISSN  02578972

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© 2018 Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) was conducted in a N2 atmosphere to form ultrafine grains on the surface of Fe-Cr alloys. The surface microstructure of Fe-2%Cr alloy and Fe-10%Cr alloy treated with AIH-FPP at 973 K and 1073 K was characterized using optical microscopy, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). AIH-FPP can be used as a thermomechanical process to form ultrafine grains on the surface of Fe-Cr alloys because strain is induced by AIH-FPP at a high rate and high temperature during dynamic recrystallization. In particular, the grain size of Fe-Cr alloys tends to decrease with increasing AIH-FPP treatment time. This is attributed to the increase in the strain induced by AIH-FPP with increasing AIH-FPP treatment time during dynamic recrystallization. Thus, the AIH-FPP-induced stratification structure composed of fine grains becomes more pronounced with increasing treatment time. Furthermore, the AIH-FPP treatment temperature at which fine grains are formed depends on the Cr concentration of the Fe-Cr alloys.

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Rapid surface nitriding of titanium alloy by a nanosecond fiber laserunder atmospheric conditions"

K. Katahira , Y. Tanida , S. Takesue , J. Komotori

CIRP Annals - Manufacturing Technology 67   563 - 566 2018

Research paper (scientific journal), Joint Work

放電プラズマ焼結によるチタン／ジルコニア複合生体材料の創製

菊池将一，片平和俊，小茂鳥潤

日本金属学会誌 82   341 - 348 2018

Research paper (scientific journal), Joint Work

Surface Properties of Intermetallic Compound Layer Formed on Titanium Alloy by AIH-FPP (Atmospheric Controlled Induction Heating Fine Particle Peening) Treatment

S. Takesue, S. Saito, J. Komotori, Y. Misaka, K. Kawasaki

Materials Transactions 59 ( 9 ) 1452 - 1457 2018

Research paper (scientific journal), Joint Work

Improvement of the electrochemical characteristics of medium carbon steel using atmospheric-controlled induction-heating fine particle peening

S. Kikuchi, S. Iwamae, H. Akebono, J. Komotori, Y. Misaka

Surface and Coatings Technology (Surface and Coatings Technology)  354   76 - 82 2018

Research paper (scientific journal), Joint Work,  ISSN  02578972

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© 2018 Elsevier B.V. Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) using Cr and Mo shot particles was introduced to improve the electrochemical characteristics of AISI 1045 medium carbon steel in NaCl solution. AIH-FPP can form transferred and diffused layers of shot particles on the surface of carbon steel. The corrosion potential of the AIH-FPP-treated steel was higher than that of the untreated steel in a NaCl environment. Furthermore, a passivation region was observed in the carbon steel treated with AIH-FPP using Cr shot particles after peening with Mo shot particles through the formation of a surface-modified layer with high Cr and Mo concentrations in 20% NaCl solution.

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Formation of titanium/zirconia based biomaterial fabricated by spark plasma sintering

Kikuchi S., Katahira K., Komotori J.

Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals (Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals)  82 ( 9 ) 341 - 348 2018

ISSN  00214876

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© 2018 The Japan Institute of Metals and Materials New biomaterials were fabricated by sintering powders of commercially pure titanium（CP-Ti）and partially-stabilized zirconia （PSZ）. The Ti/PSZ composites with different mass fraction of PSZ were consolidated by spark plasma sintering（SPS）at 1173 K and 1373 K. The microstructures of composites were characterized using a scanning electron microscope（SEM）, an energy dispersive X-ray spectrometer（EDS）, X-ray photoelectron spectroscopy（XPS）and an X-ray diffraction（XRD）. Vickers hardness tests, reciprocating wear tests, fracture toughness measurements, cell culture tests and electrochemical polarization tests were conducted to discuss their capability for biomaterials as a slide member. The composites with high wear resistance were achieved by sintering at 1373 K with high mass fraction of PSZ; however, fracture toughness showed low value. In contrast, the composites sintered at relatively low temperature of 1173 K with low mass fraction of PSZ showed high wear resistance and fracture toughness. Furthermore, electrochemical characteristics and biocompatibility of composites sintered at 1173 K tended to improve as the mass fraction of PSZ decreased.

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Surface properties of intermetallic compound layer formed on titanium alloy by AIH-FPP (Atmospheric controlled induction heating fine particle peening) treatment⁺1

Takesue S., Saito S., Komotori J., Misaka Y., Kawasaki K.

Materials Transactions (Materials Transactions)  59 ( 9 ) 1452 - 1457 2018

ISSN  13459678

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© 2018 The Japan Society for Heat Treatment. The effect of the intermetallic compound layer formed by atmospheric controlled induction heating fine particle peening (AIH-FPP) treatment on the wear resistance and high-temperature oxidation resistance of titanium alloy was investigated. To form an intermetallic compound layer on a titanium alloy by AIH-FPP treatment, pure titanium, aluminum and nickel particles were mechanically milled using a planetary ball mill, and the prepared particles were used as shot particles in the AIH-FPP treatment. The results showed that intermetallic compound layers, consisted of Ti3Al and Ti2NiAl3, were formed on titanium alloy by AIH-FPP treatment using the prepared particles. The wear resistance and high-temperature oxidation resistance of the AIH-FPP treated specimen were higher than those of the untreated ones.

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硝酸アルミニウム溶液を用いたレーザ誘起湿式改質法によるSUS316L鋼の表面改質

江面篤志,良峰皓,片平和俊,小茂鳥潤

精密工学会誌 83 ( 1 ) 72 - 77 2017.01

Research paper (scientific journal), Joint Work

Efficient subculture process for adherent cells by selective collection using cultivation substrate vibration

Y.Kurashina,K.Takemura,　J.Friend,S.Miyata,J.Komotori

IEEE Transactions on Biomedical Engineering 64 ( 3 ) 580 - 587 2017

Research paper (scientific journal), Joint Work

AIH-FPP処理によるチタン合金表面のTi-Al金属間化合物化プロセスの検討

齋藤周也，武末翔吾，小茂鳥潤，深沢剣吾，三阪佳孝

砥粒加工学会誌 61 ( 3 ) 145 - 150 2017

Research paper (scientific journal), Joint Work

ガスブローIH窒化を施したTi-6Al-4V合金の表面特性に及ぼすガス流速の影響

武末翔吾,菊池将一,曙紘之,小茂鳥潤,深沢剣吾,三阪佳孝

日本金属学会誌 81 ( 5 ) 288 - 293 2017

Research paper (scientific journal), Joint Work

ミスト状硝酸アルミニウム溶液を用いたSUS316L鋼のレーザ誘起湿式表面改質

江面篤志,大川弘暉,片平和俊,小茂鳥潤

砥粒加工学会誌 61 ( 5 ) 269 - 274 2017

Research paper (scientific journal), Joint Work

メカニカルミリングにより作製した粒子を用いたAIH-FPP処理による TiAl3被膜の創成と耐摩耗性の評価

齋藤周也,武末翔吾,小茂鳥潤,深沢剣吾,三阪佳孝

日本金属学会誌 81 ( 6 ) 295 - 300 2017

Research paper (scientific journal), Joint Work

AIH-FPP処理により形成したCr拡散層がDLC薄膜の密着性に及ぼす影響

武末翔吾,曙紘之,古川瑞樹,菊池将一,小茂鳥潤,野村博郎

日本金属学会誌 81 ( 7 ) 352 - 357 2017

Research paper (scientific journal), Joint Work

Generation of biocompatible TiO2 layer using atmospheric pressure plasma‐assisted fine particle peening

K.Katahira,N.Mifune,J.Komotori

CIRP Annals Manufacturing Technology 66   515 - 518 2017

Research paper (scientific journal), Joint Work

Effects of Gas Blow Velocity on the Surface Properties of Ti-6Al-4V Alloy Treated　by Gas Blow IH Nitriding

S.Takesue,S.Kikuchi,H. Akebono,J.Komotori, K.Fukazawa, Y.Misaka

Materials Transactions 58 ( 8 ) 1155 - 1160 2017

Research paper (scientific journal), Joint Work

Enzyme-Free Cell Detachment Mediated by Resonance Vibration With Temperature Modulation

Y.Kurashina,M.Hirano, C.Imashiro,K.Totani, J.Komotori,K.Takemura

Biotechnology and Bioengineering 114 ( 10 ) 2279 - 2288 2017

Research paper (scientific journal), Joint Work

AIH-FPP処理によるCr/Ni 拡散層の創成と炭素鋼の耐高温酸化性に及ぼすその効果

武末翔吾,岩前翔太,亀山雄高,小茂鳥潤,深沢剣吾,三阪佳孝

日本機械学会論文集 83 ( 851 ) 1 - 10 2017

Research paper (scientific journal), Joint Work

Experimental investigation of machinability and surface quality of sapphire machined with polycrystalline diamond micro-milling tool

K. Katahira, Y. Matsumoto, J. Komotori

The International Journal of Advanced Manufacturing Technology DOI 10.1007/s00170-017-0881-1 2017

Research paper (scientific journal), Joint Work

Enzyme-Free Cell Detachment Mediated by Resonance Vibration With Temperature Modulation

Y.Kurashina, M.Hirano, C.Imashiro, K.Totani, J.Komotori, K.Takemura

Biotechnology and Bioengineering 114 ( 10 ) 2279 - 2288 2017

Research paper (scientific journal), Joint Work

Effect of Cooling Stimulus on Collection Efficiency of Calf Chondrocytes Cultivated on Metal Surface

Y. Kurashina, S. Miyata, J. Komotori

Int. J. of Automation Technology 11 ( 6 ) 925 - 931 2017

Research paper (scientific journal), Joint Work

Ti-6Al-4V合金の大気酸化挙動に及ぼす微粒子ピーニングの影響

菊池将一,小茂鳥潤

日本金属学会誌 80 ( 2 ) 114 - 120 2016

Research paper (scientific journal), Joint Work

Inhibitory function of NKT cells during early induction phase of nickel allergy

H.Okuno, M.Satoh, E.Takeuchi, K.Eshima, M.Terashima, J.Komotori, S.Habu, H.Tamauchi， K.Iwabuchi

Immunobiology 221   833 - 838 2016

Research paper (scientific journal), Joint Work

Generation of bio-compatible titanium alloy surfaces by laser-induced wet treatment

K. Katahira , A. Ezura ,　　　 K.Ohkawa , J. Komotori ,　　　　　　 H. Ohmori

CIRP Annals-Manufacturing Technology 65   237 - 240 2016

Research paper (scientific journal), Joint Work

AIH-FPP 処理によるNi-Al 金属間化合物被膜の創製

齋藤周也, 鈴木広野,小茂鳥潤,深沢剣吾,三阪佳孝,川嵜一博

日本金属学会誌 80 ( 9 ) 562 - 569 2016

Research paper (scientific journal), Joint Work

Surface Modification of Carbon Steel by Atmospheric-Controlled IH-FPPTreatment Using Mixed Chromium and High-Speed Steel Particles

S.Ota, H.Akebono, S.Kikuchi, K.Murai, J.Komotori,　K.Fukazawa, Y.Misaka, K.Kawasaki

Materials Transactions 57 ( 10 ) 1801 - 1806 2016

Research paper (scientific journal), Joint Work

Improvement in wear resistance of stainless steel by laser-induced local surface treatment

A,Ezura, H.Yoshimine, K. Ohkawa, K.katahira, J.Komotori

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 10 ( 5 ) 16-00144 - (10pages) 2016

Research paper (scientific journal), Joint Work

Bone and Gingival Connective Tissue Responses towards Nanosecond-Pulsed Laser-Treated Titanium Implants

Y. Fukayo, T. Amemiya, K. Nakaoka, M. Mizutani, J. Komotori, Y. Hamada

Journal of Hard Tissue Biology 25 ( 2 ) 181 - 194 2016

Research paper (scientific journal), Joint Work

真空置換AIH-FPP処理システムを用いて表面窒化した工業用純チタンの表面特性評価

太田俊平,菊池将一,曙紘之,大宮正毅,小茂鳥潤,深沢剣吾,三阪佳孝,川嵜一博

砥粒加工学会誌 59 ( 11 ) 643 - 648 2015.11

Research paper (scientific journal), Joint Work

金属製培養基材の表面改質と流体せん断力による複合刺激が軟骨細胞の増殖性および細胞形態に与える影響

中井創一朗，宮田昌悟，小茂鳥潤

日本金属学会誌 79 ( 6 ) 324 - 329 2015.06

Research paper (scientific journal), Joint Work

Effect of atmospheric-pressure plasma jet on polycrystalline diamond micro-milling of silicon carbide

K.Katahira, H.　Ohmori , S.Takesue , J.Komotori , K.Yamazaki

CIRP Annals-Manufacturing Technology 64   129 - 132 2015

Research paper (scientific journal), Joint Work

Evaluation of the gas nitriding of fine grained AISI 4135 steel treated with fine particle peening and its effect on the tribological properties

S. Kikuchi ，J. Komotori

Materials Transactions 56 ( 4 ) 556 - 562 2015

Research paper (scientific journal), Joint Work

雰囲気制御IH-FPP(AIH-FPP)を用いたFe-Al金属間化合物の形成とその応用

亀山雄高，竹嶋隼人，小茂鳥潤，村澤功基

日本金属学会誌 79 ( 9 ) 452 - 460 2015

Research paper (scientific journal), Joint Work

クロム/高速度工具鋼混合粒子を用いた真空置換AIH-FPP処理による炭素鋼の表面改質

太田俊平，村井一恵，小茂鳥潤，深沢剣吾，三阪佳孝，川嵜一博

日本金属学会誌 79 ( 10 ) 491 - 496 2015

Research paper (scientific journal), Joint Work

純チタンへのナノ秒パルスレーザ照射による生体活性表面の創成

水谷正義，益子直人，本多遼，村上諒，小茂鳥潤，厨川常元

砥粒加工学会誌 59 ( 1 ) 17 - 22 2015

Research paper (scientific journal), Joint Work

PCD 微細エンドミルによるSiC の加工特性と電解援用リコンディショニング

片平和俊，武末翔吾，渡邉健志，小茂鳥 潤

砥粒加工学会誌 58 ( 9 ) 577 - 582 2014.09

Joint Work

Improved Cytocompatibility of　Nanosecond-Pulsed　Laser-Treated Commercially Pure Ti Surfaces

M.Mizutani,　R.Honda，Y.Kurashina，J. Komotori，H.Ohmori

Int. J. of Automation Technology 8 ( 1 ) 102 - 109 2014

Research paper (scientific journal), Joint Work

Effects of fine particle peening on oxidation behavior of nickel-titanium shape memory alloy

S. Kikuchi, Y. Kameyama, M. Mizutani, J. Komotori

Materials Transactions 55 ( 1 ) 176 - 181 2014

Research paper (scientific journal), Joint Work

微細表面凹凸を有するステンレス鋼表面における仔ウシ由来軟骨細胞の増殖性と培養ディッシュへの応用

倉科佑太，濱野拓巳，宮田昌悟，小茂鳥潤，小山尹誉

日本金属学会誌 78 ( 4 ) 170 - 176 2014

Research paper (scientific journal), Joint Work

Micromilling characteristics and electrochemically assisted reconditioning of polycrystalline diamond tool surfaces for ultra-precision machining of high-purity SiC

K.Katahira, S.Takesue, J.Komotori, K.Yamazaki

CIRP Annals-Manufacturing Technology 63   329 - 332 2014

Research paper (scientific journal), Joint Work

A study on PCD tool surface reconditioning technique for SiC micromachining

S. Takesue, K. Katahira, J. Komotori

Procedia CIRP 14   355 - 359 2014

Research paper (scientific journal), Joint Work

Effective cell collection method using collagenase and ultrasonic vibration

Y. Kurashina, K. Takemura, S. Miyata, J.Komotori, T. Koyama

Biomicrofluidics 8   0544118 2014

Research paper (scientific journal), Joint Work

Modification of surface properties on cemented carbide alloys through mirror-quality finish grinding

K. Katahira, J. Komotori

The ASME Journal of Micro and Nano-Manufacturing 1 ( 044501 ) 1 - 5 2013

Research paper (scientific journal), Joint Work

雰囲気制御IH-FPP(AIH-FPP)を施した鋼表面におけるケイ化物の形成とそれに伴う耐食性の改善

亀山雄高，天野有規，小茂鳥潤，深沢剣吾，三阪佳孝，川嵜一博

日本金属学会誌 77 ( 1 ) 7-13 2013

Research paper (scientific journal), Joint Work

Increasing surface hardness of AISI 1045 steel by AIH-FPP / Plasma nitriding treatment

S. Kikuchi, T. Fukuoka, T. Sasaki, J. Komotori, K. Fukazawa, Y.Misaka, K. Kawasaki

Materials Transactions 54 ( 3 ) 344-349 2013

Research paper (scientific journal), Joint Work

Effects of nanosecond laser fabrication on bioactivity of pure Titanium

Procedia CIRP 5   242-246 2013

Research paper (scientific journal), Joint Work

Development of a new grinding system for finishing of hemispherical inside surface

H. Kotani, J. Komotori, T.Naruse, M. Mizutani, K.Katahira, H. Ohmori, M. Wase

Int. J. Nanomanufacturing 9 ( 1 ) 77-86 2013

Research paper (scientific journal), Joint Work

Ni-Ti形状記憶合金のNiイオン溶出挙動に及ぼす微粒子ピーニングの効果

菊池将一，水谷正義，亀山雄高，小茂鳥潤

砥粒加工学会誌 57 ( 8 ) 530-535 2013

Research paper (scientific journal), Joint Work

Cell compatibility of Co-Cr-Mo alloy treated with electrolytic in-process dressing grinding/thermal oxidation hybrid process

I. Hiraga, M. Hamada, J. Komotori, M. Mizutani

Int. J. Nanomanufacturing 9 ( 5/6 ) 486 - 495 2013

Research paper (scientific journal), Joint Work

サージカルスチールの濡れ性を制御するアルミナ系砥粒を用いた表面改質加工法の研究

片平和俊，水谷正義，大森整，小茂鳥潤

砥粒加工学会誌 56 ( 8 ) 539-544 2012

Research paper (scientific journal), Joint Work

クロム／高速度工具鋼混合粒子を用いてAIH-MFPPを施した炭素鋼表面の組織と耐食性

天野有規，天野悟志，福岡隆弘，小茂鳥潤

材料 61 ( 3 ) 273-279 2012

Research paper (scientific journal), Joint Work

Effect of fine particle peening on oxidation resistance of austenitic stainless steel

S. Kikuchi, Y. Yasutake, J. Komotori

Journal of Solid Mechanics and Materials Engineerin 6 ( 6 )  2012

Research paper (scientific journal), Joint Work

オーステナイト系ステンレス鋼（SUS316）の疲労特性に及ぼす微粒子ピーニング/ガス窒化複合表面処理の効果

菊池将一，中原康仁，土橋孝治，小茂鳥潤

材料 61 ( 8 ) 680-685 2012

Research paper (scientific journal), Joint Work

AIH-FPP／ガス窒化複合表面処理によるS45C鋼表面の高硬さ化

福岡隆弘，菊池将一，小茂鳥潤

日本金属学会誌 76 ( 7 ) 422-428 2012

Research paper (scientific journal), Joint Work

線維芽細胞の増殖性と接着性に及ぼす基材表面の微細凹凸形状の影響

長井篤，宮田昌吾，斉藤万里雄，小茂鳥潤，小尾晋之介，難波洋司，小山尹誉

日本機械学会論文集（A編） 77 ( 775 ) 544-551 2011

Research paper (scientific journal), Joint Work

微粒子ピーニングを施したSCM435H鋼の残留応力と疲労特性に及ぼす基材および投射粒子硬さの影響

菊池将一，廣田遥，小茂鳥潤，

材料 60 ( 6 ) 547-553 2011

Research paper (scientific journal), Joint Work

球芯振りELID研削にいよる金属製人工股関節ライナーの鏡面加工

水谷正義，小谷拓嗣，成瀬哲也，小茂鳥潤，片平和俊，大森整，住谷健二，和佐宗樹，藤田正弘，長谷川正，

精密工学会誌 77 ( 6 ) 576-580 2011

Research paper (scientific journal), Joint Work

雰囲気制御IH-FPP処理による改質層形成機構に及ぼす投射粒子の影響

福岡隆弘，菊池将一，小茂鳥潤，深沢剣吾，三阪佳孝，川嵜一博，

日本金属学会誌 75 ( 7 ) 372-378 2011

Research paper (scientific journal), Joint Work

微粒子ピーニング処理によるアルミニウム合金表面へのSiC粒子移着層形成メカニズムに関する考察

天野有規，亀山雄高，南部絋志，小茂鳥潤，

材料 60 ( 7 ) 655-661 2011

Research paper (scientific journal), Joint Work

微粒子ピーニングを施した純鉄のプラズマ窒化挙動

菊池将一，福岡隆弘,小茂鳥潤

日本機械学会論文集（A編） 77 ( 780 ) 1367-1377 2011

Research paper (scientific journal), Joint Work

IH-FPP処理システムを利用した微細結晶粒・高硬さ表面の創製と鋼の疲労特性に及ぼすその効果

原田翼，菊池将一，小茂鳥潤，深沢剣吾，三阪佳孝，川嵜一博

材料 60 ( 12 ) 1091-1096 2011

Research paper (scientific journal), Joint Work

Ni-Ti形状記憶合金の細胞適合性に及ぼす高温酸化処理の効果

水谷正義，松村有希子，小茂鳥潤，玉内秀一

日本機械学会論文集A編 77 ( 784 ) 2144-2152 2011

Research paper (scientific journal), Joint Work

Effect of processing parameters on characteristics of surface modified layers generated by atmospheric controlled IH-FPP system

T. Fukuoka, Y. Ujiie,J. Komotori, K. Fukazawa, Y. Misaka, K. Kawasaki

Procedia Engineering 10   1503-1508 2011

Research paper (scientific journal), Joint Work

Control of cellular activity of fibroblasts on size-tuned fibrous hydroxyapatite nanocrystals

S.Okada, A.Nagai, Y.Oaki, J.Komotori, H.Imai

Acta Biomaterialia 7   1290 - 1297 2011

Research paper (scientific journal), Joint Work

Control of cellular activity of osteoblastic cells with microtopography of biphasic calcium phosphate scaffolds

S.Okada, Y.Oaki, J.Komotori , H.Imai

Journal of the Ceramic Society of Japan 119 ( 8 ) 635 - 639 2011

Research paper (scientific journal), Joint Work

Fatigue Properties of Gas Nitrided Austenitic Stainless Steel Pre-treated with Fine Particle Peening

S. Kikuchi, Y. Nakahara, J. Komotori

International Journal of Fatigue 32 ( 2 ) 403-410 2010

Research paper (scientific journal), Joint Work

表面改質加工（EG-X）法によるNi-Ti形状記憶合金の高品位表面仕上げとその改質効果の検討

水谷正義，菊池将一,廣田遥，小茂鳥潤，大森整，片平和俊

日本機械学会論文集（A編） 76 ( 764 ) 303-314 2010

Research paper (scientific journal), Joint Work

Th2 Immune Response Plays a Critical Role in the Development of Nickel-Induced Allergic Contact Dermatitis

S. Niiyama, H. Tamauchi,Y. Amoh,M.Terashima, Y. Matsumura, M. Kanoh,S. Habu, J.Komotori, K. Katsuoka

Int Arch Allergy Immunol 153   303-314 2010

Research paper (scientific journal), Joint Work

雰囲気制御 IH-FPP 処理による構造用綱（S45C）の表面改質

伊藤達也，菊池将一，亀山雄高，小茂鳥潤, 深沢剣吾，三阪佳孝，川嵜一博

日本金属学会誌 74 ( 8 ) 533-539 2010

Research paper (scientific journal), Joint Work

Analysis of pneumatic fine particle peening process by using a high-speed-camera

T. Ito, S. Kikuchi, Y. Hirota, A. Sasago, J. Komotori

International Journal of Modern Physics B 24 ( 15-16 ) 3047-3052 2010

Research paper (scientific journal), Joint Work

表面改質加工を施した成形金型材料の濡れ性評価

片平和俊，赤羽陽平,水谷正義，小茂鳥潤，大森整

砥粒加工学会誌 54 ( 6 ) 373-377 2010

Research paper (scientific journal), Joint Work

放電プラズマ焼結（SPS）法を用いて作製したTiボンド砥石による表面改質加工

片平和俊，齋藤智之，小谷拓嗣，小茂鳥潤，成瀬哲也，水谷正義，大森整

砥粒加工学会誌 54 ( 6 ) 378-383 2010

Research paper (scientific journal), Joint Work

ピーニングにおける鋼の微視組織変化に及ぼす粒子寸法の影響

砥粒加工学会誌 54 ( 12 ) 720-724 2010

Research paper (scientific journal), Joint Work

高疲労特性を有する自溶合金溶射部材作製のための有効な再溶融処理方法の提案

曙紘之，小茂鳥潤，清水真佐男

日本機械学会論文集（A編） 76 ( 767 ) 839-845 2010

Research paper (scientific journal), Joint Work

Effect of hardness ratio on plastic dissipation in fine particle peening

M. Omiya, S. Kikuchi, Y. Hirota, J. Komotori

Journal of Solid Mechanics and Materials Engineering 4 ( 11 ) 1585-1594 2010

Research paper (scientific journal), Joint Work

Investigation on high-temperature oxidization of mirror-quality ground stainless steel

K. Katahira, H. Ohmori, M. Mizutani, J. Komotori

International Journal of Modern Physics B 24 ( 15＆16 ) 3005-3010 2010

Research paper (scientific journal), Joint Work

Modification of surface properties on a nitride based coating films through mirror-quality finish grinding

K. Katahira, H. Ohmori, J. Komotori, D. Dornfeld, H. Kotani, M. Mizutani

Annals of the CIRP 59 ( 1 ) 593-596 2010

Research paper (scientific journal), Joint Work

Adhesion of osteoblast-like cells on nanostructured hydroxyapatite

S.Okada, H.Ito, A.Nagai, J.Komotori, H.Imai

Acta Biomaterialia 6   591 - 597 2010

Research paper (scientific journal), Joint Work

タテジマフジツボのキプリス幼生付着器官の寸法と測定方法の検討

勝山一朗，小林聖治，平杉亜希，小茂鳥潤

The Sessile Organisms Society of Japan 26 ( 2 ) 89-92 2009

Research paper (scientific journal), Joint Work

Effect of micro ploughing during fine particle peening process on the microstructure of metallic materials

Y. Kameyama, J. Komotori

Journal of Materials Processing Technology 209 ( 20 ) 6146-6155 2009

Research paper (scientific journal), Single Work

Effect of simultaneous surface modification process on wear resistance of martensitic stainless steel

S. Kikuchi, A. Sasago, J. Komotori

Journal of Materials Processing Technology 209 ( 20 ) 6156-6160 2009

Research paper (scientific journal), Joint Work

タテジマフジツボキプリス幼生の基材選択性と付着に及ぼす微細凹凸表面形状の影響

堀内麗子，小林聖治，亀山雄高，水谷正義，小茂鳥潤，勝山一朗

材料と環境 58 ( 8 ) 302-307 2009

Research paper (scientific journal), Joint Work

Wear Resistance of AISI316L Steel Modified by Pre-FPP Treated DLC Coating

H. Nanbu, S. Kikuchi, Y. Kameyama, J. Komotori

Journal of Solid Mechanics and Materials Engineering 3 ( 2 ) 328-335 2009

Research paper (scientific journal), Joint Work

Surface generation of superior hydrophilicity for surgical steels by specific grinding parameters

H. Ohmori, K. Katahira, J. Komotori, Y. Akahane, M. Mizutani, T. Naruse

CIRP Annals-Manufacturing Technology 58   503-506 2009

Research paper (scientific journal), Joint Work

Effect of fine particle peening treatment prior to nitriding on fatigue properties of AISI 4135 steel

S. Kikuchi, J. Komotori

Journal of Solid Mechanics and Materials Engineering 2 ( 11 ) 1444-1450 2008

Research paper (scientific journal), Joint Work

高周波誘導加熱を利用したIHFPP 処理システムの構築とそれによるS45C 鋼の表面改質

笹子敦司，菊池将一，亀山雄高，小茂鳥潤，深沢剣吾，三阪佳孝，川嵜一博

日本金属学会誌 72 ( 5 ) 347-352 2008

Research paper (scientific journal), Joint Work

Fatigue strength and fracture mechanism of different post-fused thermal spray-coated steels with a Co-based self-fluxing alloy coating

J. Oh, J. Komotori, J. Song

International Journal of Fatigue 30 ( 8 ) 1441-1447 2008

Research paper (scientific journal), Joint Work

Functionalization of stainless steel surface through mirror-quality finish grinding

H. Ohmori, K. Katahira, J. Komotori, M. Mizutani

Annals of the CIRP 57 ( 1 ) 545-549 2008

Research paper (scientific journal), Joint Work

電解インプロセスドレッシング(ELID)研削を利用したチタン合金の表面改質加工とその効果

水谷正義，山本聡一，小茂鳥潤，片平和俊，大森整

材料 57 ( 9 ) 887-892 2008

Research paper (scientific journal), Joint Work

表面改質加工法によるチタン合金の表面機能制御

水谷正義，小茂鳥潤，片平和俊，大森整

材料試験技術 53 ( 4 ) 254-260 2008

Research paper (scientific journal), Joint Work

Microstructural change induced by fine particle peening and its effect on elemental diffusion

Y. Hirota, S. Kikuchi, J. Komotori

Journal of Solid Mechanics and Materials Engineering 2 ( 10 ) 1330-1337 2008

Research paper (scientific journal), Joint Work

Effect of fine particle peening (FPP) conditions on microstructural characteristics of Ti-6AI-4V alloy

Y. Kameyama, J. Komotori

Journal of Solid Mechanics and Materials Engineering 2 ( 10 ) 1338-1347 2008

Research paper (scientific journal), Joint Work

砥石ボンド材の電解現象を利用した表面改質加工法に関する研究

KOMOTORI JUN

砥粒加工学会誌 51 ( 6 ) 333-338 2007.06

Research paper (scientific journal), Joint Work, Accepted

鉄鋼基材に被覆したDLC膜の摩擦・磨耗挙動および密着性に及ぼす微粒子ピーニング処理の効果

KOMOTORI JUN

材料 56 ( 5 ) 453-459 2007.05

Research paper (scientific journal), Joint Work, Accepted

人工骨頭用材料Co-Cr合金の高品位加工および細胞毒性評価

KOMOTORI JUN

砥粒加工学会誌 51 ( 3 ) 46-50 2007.03

Research paper (scientific journal), Joint Work, Accepted

疲労過程における自溶合金溶射皮膜のはく離挙動に関する考察

KOMOTORI JUN

日本機械学会論文集（A編） 73 ( 725 ) 96-101 2007.01

Research paper (scientific journal), Joint Work, Accepted

Ni基自溶合金溶射部材の疲労特性に影響を及ぼす微視組織因子について

KOMOTORI JUN

材料試験技術 52 ( 1 ) 19-26 2007.01

Research paper (scientific journal), Joint Work, Accepted

Development of a new integrated machining system -Improvement of surface characteristics on metallic biomaterials with a new electrical grinding system-

M. Mizutani, K. Katahira，H. Ohmori, J. Komotori

Journal of Machine Engineering 7 ( 1 ) 15 - 23 2007

Joint Work

Tribological properties of structural steel modified by fine particle bombardment(FPB) and diamond-like carbon hybrid surface treatment

Y. Kameyama, J. Komotori

Wear 263   1354-1363 2007

Research paper (scientific journal), Joint Work, Accepted

The corrosion/wear mechanisms of Ti-6Al-4V alloy for different scratching rate

J. Komotori, N. Hisamori, Y. Ohmori

Wear 263   412-418 2007

Research paper (scientific journal), Joint Work, Accepted

ペルヒドロポリシラザンから作成したSiO2膜の構造と生体活性能の評価

KOMOTORI JUN

材料 56 2007

Research paper (scientific journal), Joint Work, Accepted

Effect of coating microstructure on the fatigue properties of steel thermally sprayed with Ni-based self-fluxing alloy

H. Akebono, J. Komotori, M. Shimizu

International Journal of Fatigue  2007

Research paper (scientific journal), Joint Work, Accepted

Effect of Fine Particle Bombardment Temperature on the Surface Characteristics of Ti-6Al-4V Alloy

Y. Kameyama, J. Komotori

International Journal of Modern Physics B 20 ( 25 ) 3698-3703 2006.10

Research paper (scientific journal), Joint Work, Accepted

高温酸化処理を施したNi-Ti形状記憶合金の表面特性と耐食性の評価

菅原博勝，五藤寛丈，小茂鳥潤

材料 55 ( 10 ) 965-970 2006.10

Research paper (scientific journal), Joint Work

Surface Characterization of Ni-Ti Alloy Modified by Isothermal Oxidation

H.Sugawara, H.Goto, J.Komotori

International Journal of Modern Physics B 20 ( 25 ) 3573-3578 2006.10

Research paper (scientific journal), Joint Work, Accepted

The Effect of Coating Thickness on Fatigue Properties of Steel Thermally Sprayed with Ni-Based Self-Fluxing Alloy

H. Akebono, J. Komotori, H. Suzuki

International Journal of Modern Physics B 20 ( 25 ) 3599-3604 2006.10

Research paper (scientific journal), Joint Work, Accepted

Control of Surface Modified Layer on Metallic Biomaterials by an Advanced Elid Grinding System (EG-X)

M. Mizutani, J. Komotori, K. Katahira, H. Ohmori

International Journal of Modern Physics B 20 ( 25 ) 3605-3610 2006.10

Research paper (scientific journal), Joint Work, Accepted

Fatigue Properties of Hybrid Surface Modified SCM435H Steeｌ

K. Kikuchi, K. Fukazawa, J. Komotori, M. Shimizu

International Journal of Modern Physics B 20 ( 25 ) 3646-3651 2006.10

Research paper (scientific journal), Joint Work, Accepted

Preparation of hierarchically organized calcium phosphate-organic polymer composites by calcification of hydrogel

Kozue Furuichi,Yuya Oaki,Hirofumi Ichimiya,Jun Komotori,Hiroaki Imai

Science and Technology of Advanced Materials 7   219-225 2006.03

Research paper (scientific journal), Joint Work

Effects of a new surface modifying technique on high temperature oxidation characteristics in anticorrosive metallic materials

片平和俊，水谷正義，齋藤智之，小茂鳥潤，上原嘉宏，大森整

砥粒加工学会誌 50 ( 3 ) 124-129 2006.03

Research paper (scientific journal), Single Work

The effect of Fine Particle Bombardment/Nitriding treatment on fatigue properties of SCM435H steel

菊池将一，亀山雄高，深沢剣吾，小茂鳥潤

砥粒加工学会誌 50 ( 3 ) 134-137 2006.03

Research paper (scientific journal), Single Work

Properties of Hydroxyapatite – Hyaluronic acid Nano-Composite Sol and its interaction with Natural Bones and Collagen Fibers

Y.Ishikawa , J.Komotori and M.Senna

Current Nanoscience  2006.02

Research paper (scientific journal), Single Work, Accepted

Investigation on Grinding Characteristics and Surface- Modifying Effects of Biocompatible Co-Cr Alloy

H.Ohmori,K,Katahira,Y.Akinou,J.Komotori,M.Mizutani

Annals of the CIRP，Vol.55 55 2006.01

Research paper (scientific journal), Joint Work, Accepted

Investigation on Grinding Characteristics and Surface-Modifying Effects of Biocompatible Co-Cr Alloy

H.Ohmori,K,Katahira,Y.Akinou,J.Komotori,M.Mizutani

Annals of the CIRP 55 2006.01

Research paper (scientific journal), Single Work

Investigation of Substrate Finishing Conditions to Improve Adhesive Strength of DLC Films

H.Ohmori, K.Katahira, J.Komotori, M.Mizutani, F.Maehama, M.Iwaki

Annals of the CIRP  2005.08

Research paper (scientific journal), Joint Work

Generation of biocompatible surface by fine particle bombardment

亀山雄高，小茂鳥潤，山田健人

砥粒加工学会誌 49 ( 2 ) 86-89 2005.02

Research paper (scientific journal), Joint Work

The Effect of Coating Thickness on Fatigue Properties of Ni-based Self-Fluxing Alloy Thermally Sprayed Steel with Long Period Fusing

曙紘之，西森久宜，小茂鳥潤，清水真佐男

溶射 42 ( 1 ) 12-16 2005.01

Research paper (scientific journal), Joint Work

Effects of Scratching Rate on the Corrosion Wear Mechanism of Ti-6Al-4V Alloys

大森洋介，小茂鳥潤，久森紀之，李秉濬

材料 54 ( 9 )  2005

Research paper (scientific journal), Joint Work

Effects of modified ground surface on adhesive strength between DLC film and ultra-precise mold

片平和俊, 前濱文人, 小茂鳥潤, 水谷正義, 大森整, 西口晃, 岩木正哉, 進藤久宜,島崎景正

砥粒加工学会誌 49 ( 3 ) 152-156 2005

Research paper (scientific journal), Single Work

Corrosion Response of Stainless Steel(SUS316)ground by ELID(Electrolytic In-Process Dressing)Grinding Method

水谷正義, 小茂鳥潤, 永田　仁, 片平和俊,　大森　整

材料 54 ( 11 ) 1178-1183 2005

Research paper (scientific journal), Single Work

Fatigue Strength of Ferritic Ductile Cast Iron Hardened by Super Rapid Induction Heating and Quenching

三阪佳孝，川嵜一博，小茂鳥潤，清水真佐男

日本金属学会誌 69 ( 12 ) 1057-1063 2005

Research paper (scientific journal), Single Work

The Effect of the Surface Roughness of Substrate on Fatigue Strength of Thermally Sprayed Steel with Ni-based Self-Fluxing Alloy

曙博紘之，牧田秀彦，小茂鳥潤，清水真佐男，福本昌宏

日本機械学会論文集（A編） 70 ( 700 ) 1709-1716 2004.12

Research paper (scientific journal), Joint Work, Accepted

Development of Corrosion/Wear/Fatigue Testing System and Its Application

清水裕典，小茂鳥潤

材料試験技術 49 ( 4 ) 211-216 2004.10

Research paper (scientific journal), Joint Work

Fatigue Strength of Ferritic Ductile Cast Iron Hardened by Super Rapid Induction Heating and Quenching

Yoshitaka Misaka, Kazuhiro Kawasaki, Jun Komotori and Masao Shimizu

Materials Transactions 45 ( 9 ) 2930-2935 2004.09

Research paper (scientific journal), Joint Work

Investigation on Color Finishing Process Conditions for Titanium Alloy Applying a New Electrical Grinding Process

Ohmori H., Katahira K., Mizutani M., Komotori J.

Annals of the CIRP 53 ( 1 ) 455-458 2004.08

Research paper (scientific journal), Joint Work, Accepted

異なる再溶融処理を施した自溶合金溶射部材の界面密着強度評価

亀山雄高，伊藤量平，小茂鳥潤

材料試験技術 49 ( 3 ) 165-170 2004.07

Research paper (scientific journal), Joint Work, Accepted

電気化学反応を利用した表面改質加工技術に関する研究ー被加工物に対する電流印加の影響ー

水谷正義，小茂鳥潤，片平和俊，伊藤伸英，大森整，根本昭彦

砥粒加工学会誌 48 ( 7 ) 387-391 2004.07

Research paper (scientific journal), Joint Work, Accepted

自溶合金溶射部材の疲労特性に及ぼす再溶融処理時間の影響

曙博紘之，伊藤量平，福本昌宏，小茂鳥潤

日本機械学会論文集（A編） 70 ( 694 ) 843-849 2004.06

Research paper (scientific journal), Joint Work, Accepted

Fabrication of High-quality Surface on Micro-tool by ELID Grinding Technique

K. Katahira, H. Ohmori, Y. Uehara, Lin W., J. Komotori, M. Mizutani

Key Engineering Materials, 257-258   441 - 446 2004

Research paper (scientific journal), Joint Work

Improvement of Corrosion Resistance and Mechanical Properties of the Biomaterial Ti-6Al-4V Alloy by ELID Grinding

M. Mizutani, J. Komotori, K. Katahira, Y. Watanabe and H. Ohmori

Key Engineering Materials 257-258   473 - 476 2004

Research paper (scientific journal), Joint Work

Precision Surface Grinding Characteristics of Stainless Steel with Electrolitic In-Process Dressing(ELID)

H.Ohmori, Ioan D. Marinescu, K.Katahira, W.Lin, J.Komotori, J.Nagata

Society of Manufacturing Engineers  2003.12

Research paper (scientific journal), Joint Work, Accepted

Effect of ELID Grinding on Corrosion Response of Metallic Biomaterials(Ti-6A1-4V alloy)

水谷正義，小茂鳥潤，片平和俊，渡邉裕，大森整

精密工学会誌 69 ( 12 )  2003.12

Research paper (scientific journal), Joint Work, Accepted

Diffusion Induced by Fine Particles Bombardment(FPB) Treatment

Yutaka Kameyama, Jun Komotori and Eiji Shimodaira

Journal of Material Testing Research Association of Japan 48 ( 4 ) 241-244 2003.10

Research paper (scientific journal), Joint Work, Accepted

Effect of ELID Grinding on Fatigue Properties of Stainless Steel

Fumihito Maehama, Masayoshi Mizutani, Jun Komotori, Kazutoshi Katahira, Yutaka Watanabe and Hitoshi Ohmori

Journal of Material Testing Research Association of Japan 48 ( 4 ) 237-240 2003.10

Research paper (scientific journal), Joint Work, Accepted

ステンレス鋼の腐食挙動に及ぼすマクロファージの影響

前田澄満，小茂鳥潤，山田健人

バイオマテリアル-生体材料- 21 ( 4 ) 319-326 2003.07

Research paper (scientific journal), Joint Work, Accepted

実験とシミュレーションの組合せ手法による高強度鋼の長寿命域疲労破壊特性の解明

深沢剣吾，岡部朋永，小茂鳥潤，清水真佐男

日本機械学会論文集（A編） 69 ( 679 ) 617 - 625 2003

Research paper (scientific journal)

Surface Finishing for Biomaterials: Application of the ELID Grinding Method

Masayoshi Mizutani, Jun Komotori, Jin Nagata, Kazutoshi Katahira and Hitoshi Ohmori

International Journal of Modern Physics B 17 ( 8,9 ) 1395-1400 2003

Research paper (scientific journal), Joint Work, Accepted

Improvement of Corrosion Resistance in Metallic Baiomaterials using a New Electrical Grinding Technique

H.Ohmori, K.Katahira, J.Nagata, M.Mizutani, J.Komotori

52nd CIRP General Assembly, San Sebastian, Spain  2002.08

Research paper (scientific journal), Joint Work

ELID Grinding and Corrosion Characteristics in Metallic Biomaterials(SUS316)

片平和俊，永田仁，大森整，小茂鳥潤

砥粒加工学会誌 46 ( 5 ) 245-249 2002.05

Research paper (scientific journal), Joint Work, Accepted

浸炭焼入れとWPC処理を組み合わせたハイブリッド表面処理による鋼の疲労強度の改善

米倉大介，小茂鳥潤，清水真佐男，清水博美

日本機械学会論文集（A編） 68 ( 667 ) 509 - 513 2002

Research paper (scientific journal), Joint Work

微粒子ショットピーニング処理を施した鋼の疲労特性におよぼす投射条件の影響

米倉大介，小茂鳥潤，清水真佐男，清水博美

表面技術協会誌 53 ( 3 ) 214 - 218 2002

Research paper (scientific journal), Joint Work

Fatigue Strength of Notched Specimen by Super Rapid Induction Heating and Quenching

三阪佳孝，川嵜一博，井上史，小茂鳥潤，清水真佐男

日本機械学会論文集（A編） 67 ( 659 ) 1167-1172 2001.07

Research paper (scientific journal), Joint Work, Accepted

The Fatigue Properties of Ferrite-Pearlite Stell Modified by WPCProcess

米倉大介，　野田淳二，　小茂鳥潤，　清水真佐男，　清水博美

日本機械学会論文集（A編） 67 ( 659 ) 1155-1161 2001.07

Research paper (scientific journal), Joint Work, Accepted

Effect of Different Adhesive Strength on Fatigue Properties of Thermally Sprayed Steel with Co-Based Self-Fluxing Alloy

呉定錫，小茂鳥潤，清水真佐男

溶射 38 ( 2 ) 65-72 2001.04

Research paper (scientific journal), Joint Work, Accepted

Influence of Coating Thickness on Fatigue Properties of Co-Based Self-Fluxing Alloy Sprayed Steels with Fusing Treatment

呉定錫，李秉濬，小茂鳥潤，清水真佐男，白井勝之

日本機械学会論文集（A編） 67 ( 656 ) 749-756 2001.04

Research paper (scientific journal), Joint Work, Accepted

Fatigue Strength of Nitrided High-Strength Titanium Alloy

森田辰郎，渕川俊作，小茂鳥潤，清水真佐男，皆川邦典，川嵜一博

日本機械学会論文集（A編） 67 ( 656 ) 719-725 2001.04

Research paper (scientific journal), Joint Work, Accepted

Fatigue Properties of Steel with Super Rapid Induction Localized Quenching

深沢剣吾，小泉勝，小茂鳥潤，清水真佐男，三阪佳孝，川嵜一博

日本機械学会論文集(A編) 67 ( 654 ) 308-313 2001.02

Research paper (scientific journal), Joint Work, Accepted

Corrosion Response of Surface Engineered Titanium Alloys Damaged by Prior Abrasion

J.Komotori, B.J.Lee, H.Dong, P.A.Dearnley

Wear 251   1239-1249 2001

Research paper (scientific journal), Joint Work, Accepted

Fatigue Strength and Fracture　Mechanism of Steel Modified by　Super-Rapid Induction Heating and　Quenching

Yoshitaka Misaka, Jun Komotori, Masao Shimizu，Kazuhiro Kawasaki

International Journal of Fatigue 23   S225-S230 2001

Research paper (scientific journal), Joint Work, Accepted

生体類似環境におけるチタン合金の疲労き裂発生寿命推定手法の提案

李秉濬，小茂鳥潤，清水真佐男

生体材料 19 ( 1 ) 3-9 2001

Research paper (scientific journal), Joint Work, Accepted

表面改質したチタン合金の腐食挙動と磨耗損傷の影響

久森紀之，小茂鳥潤，李秉濬，P.A.Dearnley

生体材料 19 ( 4 ) 121-131 2001

Research paper (scientific journal), Joint Work, Accepted

Fatigue Strength and Fracture Mechanism of Thermally Sprayed Co-Based Self-Fluxing Alloy with Fusing Treatment

呉定錫，小茂鳥潤，清水真佐男

溶射 37 ( 4 ) 166-174 2000.12

Research paper (scientific journal), Joint Work, Accepted

A New Fracture Mechanics Model for Multiple Matrix Cracks of SiC Fiber Reinforced Brittle-Matrix Composites

T.Okabe, N.Takeda, J.Komotori, M.Shimizu，W.A.Curtin

Acta Mater. 47 ( 17 ) 4299-4309 1999.08

Research paper (scientific journal), Joint Work, Accepted

Fracture Mechanism of Ferritic Ductile Cast Iron in Extremely Low Cycle Fatigue

米倉大介，荒井洋治，小茂鳥潤，清水真佐男

日本機械学会論文集（A編） 65 ( 632 ) 821-826 1999.04

Research paper (scientific journal), Joint Work, Accepted

Corrosion Fatigue Behavior of Ti-6AI-4V Alloy in Simulated Physiological Environment

李秉濬，小茂鳥潤，清水真佐男

生体材料 17 ( 1 ) 24-32 1999.03

Research paper (scientific journal), Joint Work, Accepted

均質化法による一方向CFRPの破壊モード遷移解析（第２法，数値解析）

清水映吾，野口裕久，小茂鳥潤，清水真佐男

日本機械学会論文集（A編） 65 ( 638 ) 2052 - 2059 1999

Research paper (scientific journal), Joint Work

Mechanical Behavior of SiC Fiber Reinforced Brittle-Matrix Composites

T.Okabe, J.Komotori, M.Shimizu, N.Takeda

Journal of Materials Science 34   3405-3412 1999

Research paper (scientific journal), Joint Work, Accepted

Damage Process of Unidirectional SiC Fiber Reinforced Glass-Matrix Composites

岡部朋永, 武田展雄, 今井克広, 小茂鳥潤, 清水真佐男, 今井義一

日本機械学会論文集(A編） 65 ( 631 ) 621-627 1999

Research paper (scientific journal), Joint Work, Accepted

Damage Process of Unidirectional SiC Fiber Reinforced Glass-Matrix Composites

岡部朋永，武田展雄，今井克広，小茂鳥潤，清水真佐男，今井義一

日本機械学会論文集（A編） 64 ( 628 ) 2931-2937 1998.12

Research paper (scientific journal), Joint Work, Accepted

Electrochemical Approch to the Development of a Simulating Physiological Environment for Strength Evaluation of Hard Tissue Replacement Materials

李秉濬, 小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編） 64 ( 623 ) 2005-2011 1998.07

Research paper (scientific journal), Joint Work, Accepted

　View Summary

生体硬組織代替材料の強度評価手法を確立するために，生体類似環境を実験室内に構築し，かかる環境におけるチタン合金の腐食特性について報告した（7頁）

Study on Fracture Mode Transition of Unidirectional CFRP by Using FEM

清水映吾，野口裕久，Heru S.B.Rochardjo, 小茂鳥潤, 清水真佐男

日本機械学会論文集（A編） 64 ( 622 ) 1509-1514 1998.06

Research paper (scientific journal), Joint Work, Accepted

A Crystallographic Examination of Fracture Mechanism in Low Cycle Fatigue of Pure Iron at Low Temperature

夏徳勝, 小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編) 64 ( 621 ) 1211-1214 1998.05

Research paper (scientific journal), Joint Work, Accepted

　View Summary

純鉄の低温低サイクル疲労における破壊モード遷移の要因につて，結晶学的観点から検討を行いその理由を明らかにした（4頁）

Fracture Mechanism of Ferritic Ductile Cast Iron in Extremely Low Cycle Fatigue

Jun Komotori, Masao Shimizu

Low Cycle Fatigue and Elasto-Plastic Behavior of Materials-3, ed. K.T.Rie (Elsevier Applied Science, )    39-44 1998

Research paper (scientific journal), Joint Work

Fusing Effects on Microstructure and Fatigue Properties of Co-based Alloy Sprayed Coating

竹下友之, 佐藤伸幸, 小茂鳥潤, 清水真佐男, 白井勝之

溶射 34 ( 2 ) 84-90 1997.06

Research paper (scientific journal), Joint Work, Accepted

　View Summary

高周波誘導加熱装置により自溶合金溶射部材に再溶融処理を施すことにより，皮膜の組織性状と疲労特性が向上することを報告した（7頁)

The Effect of Fracture Mechanism on Low-Cycle Fatigue Life of Pure Iron at Low Temperature

夏徳勝, 小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編) 63 ( 608 ) 665-668 1997.04

Research paper (scientific journal), Joint Work, Accepted

　View Summary

低温下において純鉄低サイクル疲労寿命が大きくばらつく要因に関して，内部き裂の発生形態と関連づけて報告した（4頁）

Microstructural Effects on Fracture Mechanisms and Fatigue Life in Extremely Low Cycle Fatigue

J.Komotori ， M.Shimizu

Engineering Against Fatigue    133-140 1997.03

Research paper (scientific journal), Joint Work, Accepted

Fatigue Strength and Fracture Mode of Superrapid Induction Hardened Steel with Shallow Hardened Layer

小茂鳥潤, 井上史, 神田倫明, 清水 真佐男, 三阪佳孝, 川嵜一博

日本機械学会論文集（Ａ編） 63 ( 606 ) 240-245 1997.02

Research paper (scientific journal), Joint Work, Accepted

　View Summary

極めて浅い硬化層を有する試験片に対して高サイクル疲労試験を実施し，その効果の有無について報告した（6頁）

Effect of Fiber Content on the Longitudinal Tensile Fracture Behavior of Uni-directional Carbon/Epoxy Composites

Heru SB ROCHRDJO, Jun KOMOTORI, Masao SHIMIZU and Yasushi MIYANO

Journal of Materials Processing Technology 67   89-93 1997

Research paper (scientific journal), Joint Work, Accepted

　View Summary

一方向CFRP材料に対して引張り試験を行うと，試験片の形状の変化に伴い破壊メカニズムが遷移する．その理由に関して力学的観点から説明を加えた（6頁）

Fatigue Propertied of Thermally Sprayed Steel with Co-Based Self-Fluxing Alloy

小茂鳥潤, 屈寧双, 清水真佐男, 白井勝之

日本機械学会論文集（Ａ編） 62 ( 604 ) 2687-2692 1996.12

Research paper (scientific journal), Joint Work, Accepted

　View Summary

Co基自溶合金溶射部材の組織と疲労特性について実験的検討を行い，同材の疲労寿命が著しくばらつくことを見出した（6頁）

Fracture Mode Transition in Low-Temperature Low-Cycle Fatigue of Commercial Pure Iron

夏徳勝, 小茂鳥潤, 桑野薫, 清水真佐男

日本機械学会論文集（Ａ編） 62 ( 600 ) 1800-1805 1996.08

Research paper (scientific journal), Joint Work, Accepted

　View Summary

工業用純鉄を供試材として低温下で低サイクル疲労試験を行うと，塑性ひずみ幅の増大にともない破壊モードが遷移することを報告した（6頁）

Fracture Mode Transition in Unidirectional CFRP

Heru SB ROCHRDJO, 小茂鳥潤, 清水真佐男, 宮野靖

日本機械学会論文集（Ａ編） 61 ( 587 ) 1540-1544 1995.07

Research paper (scientific journal), Joint Work, Accepted

　View Summary

一方向CFRP材料に対して引張り試験を行うと，試験片の形状の変化に伴い破壊メカニズムが遷移する．その理由に関して力学的観点から説明を加えた（6頁）

Effects of Specimen Configuration on Tensile Fracture Mechanism of Unidirectional CFRP

Heru SB ROCHRDJO, 小茂鳥 潤, 清水 真佐男, 宮野 靖

日本機械学会論文集（Ａ編） 61 ( 582 ) 313-318 1995.02

Research paper (scientific journal), Joint Work, Accepted

　View Summary

一方向CFRP材料の引張り試験を行い，試験片の形状を系統的に変化させることによりその破壊メカニズムも遷移することを報告した（6頁）

Transition fo Fracture Mechanism of Ductile Cast Iron in Extremely Low Cycle Fatigue

安達卓，小茂鳥潤，清水真佐男，川嵜一博

日本機械学会論文集（A編） 59 ( 558 ) 291-296 1993.02

Research paper (scientific journal), Joint Work, Accepted

　View Summary

球状黒鉛鋳鉄の場合にも，極低サイクル領域では，材料内部の黒鉛周りに発生したボイドを起点として疲労破壊を生じること，かかる内部損傷は部材の密度変化を測定することにより把握できることを報告した

Microstructural Effect Controlling Exhaustion of Ductility in Extremely Low-Cycle Fatigue

小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編） 57 ( 544 ) 2879-2883 1991.12

Research paper (scientific journal), Joint Work, Accepted

　View Summary

極低サイクル疲労域では，繰返し負荷とともに材料の延性が次第に低下する．その要因は材料の加工硬化，内部のパーライト割れ，表面に発生刷るき裂であることを報告した

Improvement of Fatigue Damage using Laser Treatment

長島敏夫, 山下啓介, 小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編） 57 ( 542 ) 2575-2580 1991.10

Research paper (scientific journal), Joint Work

　View Summary

予め疲労き裂をもつ試験片のき裂部に局所的にレーザを照射することにより疲労き裂の進展を抑制できること，また，かかる効果は圧縮残留応力によりき裂先端が閉口するためであることを報告した（6頁）

極低サイクル疲労における繰返し焼なましの効果と寿命則の関連

本郷寛, 小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編） 55 ( 520 ) 2397-2401 1989.12

Research paper (scientific journal), Joint Work, Accepted

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極低サイクル疲労域における疲労損傷は，焼きなまし処理を繰返し行うことにより修復できることを見出した（5頁）

Grain Size Effect in the Low Cycle Fatigue of a Steel under Mean Strain

小茂鳥 潤, 清水 真佐男

日本機械学会論文集（Ａ編） 55 ( 511 ) 401-408 1989.03

Research paper (scientific journal), Joint Work, Accepted

　View Summary

平均ひずみが負荷された場合の構造材料の疲労寿命を支配する要因に関して，破壊モード遷移挙動と関連づけて検討した（8頁）

Fracture Mode Transition and Miner's Law in Extremely Low Cycle Fatigue

小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編) 54 ( 505 ) 1731-1734 1988.09

Research paper (scientific journal), Joint Work

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通常成立するとされているマイナー則が，極低サイクル疲労域においては成立しない理由について，破壊モード遷移挙動と関連づけて実験観察結果に基づき説明した（4頁）

The Applicability of the Manson-Coffin Law and Miner's Law to Extremely Low Cycle Fatigue

嶋田勝紀, 小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編） 53 ( 491 ) 1178-1185 1987.07

Research paper (scientific journal), Joint Work, Accepted

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100回程度以下の繰返し負荷のもとで材料が破断に至る，極低サイクル疲労域における破壊メカニズムを調べ，同領域における新しい疲労寿命則を提案した（8頁）

The Relation between Fracture Ductility and Low Cycle Fatigue Life

小茂鳥潤, 清水真佐男

日本機械学会論文集（Ａ編） 53 ( 496 ) 2288-2292 1987.02

Research paper (scientific journal), Joint Work, Accepted

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構造材料のもつ破断延性と低サイクル疲労寿命との関係に関して，極低サイクル疲労域における破壊モード遷移挙動と関連づけて新しい考え方を提案した（5頁）