KEIO RESEARCHERS INFORMATION SYSTEM

Profile Summary 【 Display / hide 】

Profile Summary 【 Display / hide 】

• To create new products with high added value, we are conducting R&D on high-accuracy, high-efficiency, resource-saving manufacturing technologies through micro/nanometer-scale material removal, deformation, and property control. Our recent research focuses on ultra-precision mechanical fabrication, micro-nano forming/imprinting, micro electrical machining, laser machining, laser recovery, and laser Raman spectroscopy.

Career 【 Display / hide 】

Career 【 Display / hide 】

• 2000.04

  -

  2001.09

  Research Associate, Tohoku University, Graduate School of Engineering

• 2001.10

  -

  2005.03

  Associate Professor, Kitami Institute of Technology

• 2005.04

  -

  2007.03

  Associate Professor, Tohoku University, Graduate School of Engineering

• 2007.04

  -

  2012.03

  Associate Professor, Tohoku University, Graduate School of Engineering

• 2008.02

  -

  2008.04

  Sydney University, Japan-Australia Exchange Researcher

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Academic Background 【 Display / hide 】

Academic Background 【 Display / hide 】

• 1991.07

  Jilin University, Faculty of Engineering, Department of Mechanical Engineering

  University, Graduated

• 1994.03

  Jilin University, Graduate School, Division of Engineering, Department of Mechanical Engineering

  Graduate School, Completed, Master's course

• 1996.01

  Tsinghua University, Graduate School, Division of Engineering, Department of Precision Instruments and Mechanology

  Graduate School, Withdrawal before completion, Doctoral course

• 2000.03

  Tohoku University, Graduate School, Division of Engineering, Department of Mechatronics and Precision Engineering

  Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide 】

Academic Degrees 【 Display / hide 】

• Ph.D., Tohoku University, Coursework, 2000.03

Research Areas 【 Display / hide 】

Research Areas 【 Display / hide 】

• Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Manufacturing and production engineering (Precision Engineering/Mechanical manufacturing)

• Nanotechnology/Materials / Material processing and microstructure control (Material Processing/Treatment)

• Nanotechnology/Materials / Nano/micro-systems (Micro/Nanodevice)

• Nanotechnology/Materials / Composite materials and interfaces (Applied Physical Properties/Crystal Engineering)

Research Keywords 【 Display / hide 】

Research Keywords 【 Display / hide 】

• Ultraprecision machining

• Micro/nano manufacturing

• Laser processing

• Electrical discharge machining

• Nanomechanics

Books 【 Display / hide 】

Books 【 Display / hide 】

• Advanced Ceramic Coatings: Fundamentals, Manufacturing, and Classification, R. K. Gupta, A. Motallebzadeh, S. Kakooei, T. A. Nguyen, A. Behera (eds.)

  P. J. Liew, J. Yan, C. Y. Yap, Elsevier B. V., 2023.06

  Scope: Chapter 19: Electrical discharge coating with quarry dust powder suspension,  Contact page： 433-460

• Multidisciplinary Science in Micro/Nanoscale Manufacturing

  J. Yan (Guest editor), Elsevier B.V., 2020.12

  Scope: International Journal of Machine Tools and Manufacture, Volume 159 (Special Issue)

• Micro and Nanoscale Laser Processing of Hard Brittle Materials

  J. Yan and N. Takayama, Elsevier B.V., 2019.11,  Page： 242

  Scope: 1-242

• Recent Developments of Silicon Anodes for Lithium Ion Batteries

  J. Yan, CMC Publishing CO., LTD. , 2019.11,  Page： 251

  Scope: Chapter 3: Micro Pillar Generation by Laser Irradiation on Waste Silicon Powder and Its Electrode Characteristics, 20-33

• Micro and Nano Fabrication Technology

  J. Yan (ed.), Springer Nature Singapore Pte Ltd., 2018.05

  Scope: 1-959

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Papers 【 Display / hide 】

Papers 【 Display / hide 】

• On the promotion of serrated flows and shear band behaviors in a Zr-based metallic glass during ultrasonic vibration nanoindentation

  Huang H., Su W., Wei D., Jiang M., Qian Y., Yan J.

  Intermetallics （Intermetallics)  173 2024.10

  ISSN  09669795

  　View Summary

  Initiation and evolution of flow units and their correlation with mechanical behaviors of metallic glasses (MGs) are well known significant for understanding the rheological behavior of glassy substances. Here, the evolution of plastic deformation behavior of a typical Zr-based MG induced by ultrasonic vibration is investigated by means of nanoindentation, especially focusing on studying structural evolution through analysis of load-displacement curves. Furthermore, the micro-morphologies of residual indentations are characterized by using the scanning electron microscope (SEM) and atomic force microscope (AFM). Compared to quasi-static nanoindentation tests, a significant reduction in the hardness and elastic modulus of the MG by about 15 % and 30 %, respectively, is observed when subjected to ultrasonic vibration nanoindentation with an amplitude of 0.4 μm, accompanied by a pronounced indentation size effect. In addition, higher ultrasonic vibration amplitude induces larger indentation depth, more pronounced serrated flows in the load-displacement curves and more remarkable shear bands around the residual indentations, indicating ultrasonic vibration-promoted plastic flows in MG. This study provides an insight into the structural origin of plastic flows in MG systems under ultrasonic vibration, which will help to facilitate their application in the fields such as ultrasonic vibration assisted forming.

  • Access to Document (DOI)

• A nonlinear dynamic analysis of skidding behavior in rolling bearings using lubricant traction coefficients and cage flexibility

  Atef M.M., Khair-Eldeen W., Yan J., Nassef M.G.A.

  Tribology International （Tribology International)  197 2024.09

  ISSN  0301679X

  　View Summary

  Skidding is a primary cause of rolling element bearing (REB) failure, which is influenced by operating conditions, lubricant properties, and bearing design. This paper presents an improved nonlinear dynamic model of REBs to analyze the impact of lubricant characteristics on REB skidding at different speed states. The model considers time-varying traction coefficient, cage flexibility, and cage pocket clearance. The selected tested lubricants include lithium grease (LGT2), compound calcium sulfonate (CCS) grease, and 4109 Chinese aviation oil. Simulation results show that CCS grease effectively reduces cage skidding, with the lowest load limits (300 N at 2000 RPM) under constant speed conditions and the highest stable limit (2932 RPM) during acceleration. LGT2 grease exhibits minimal sensitivity to acceleration and fluctuation speed parameters change.

  • Access to Document (DOI)

• Significant improvement in surface hardness of CrMnFeCoNi high entropy alloy via nanosecond pulse laser grain refinement

  Huang H., Tian X., Wang C., Yan J.

  Vacuum （Vacuum)  226 2024.08

  ISSN  0042207X

  　View Summary

  The CrMnFeCoNi alloy with a stable single face-centered cubic (FCC) phase, representing a typical class of high-entropy alloys (HEAs), has garnered considerable attention owing to their exceptional mechanical properties. However, the inherent low hardness has impeded their utilization in structural or contact components. This study attempted to improve the surface hardness of CrMnFeCoNi HEA via grain refinement realized by nanosecond pulse laser irradiation. The effects of laser parameters on the surface microstructures, chemical composition, and mechanical properties were investigated, and the mechanism for grain refinement was analyzed. The experimental results showed that the hardness of the laser-irradiated surface was significantly improved without altering the chemical composition. This study provides a simple but effective method to refine the grain of HEAs and improve their surface hardness.

  • Access to Document (DOI)

• Surface quality and mechanical property evolution of laser nitrided Zr-based metallic glass induced by laser shock flattening

  Huang H., Xu P., Liu B., An H., Qian Y., Yan J.

  Vacuum （Vacuum)  224 2024.06

  ISSN  0042207X

  　View Summary

  Laser nitriding is an effective modification technique to improve the comprehensive mechanical properties of metallic glasses (MGs). However, numerous micro-defects, such as pores and humps, usually appear on the laser-nitriding-treated (LNed) MG surface, and therefore additional post-treatment is required. Herein, laser shock processing was implemented to flatten the LNed MG and as well modify its surface mechanical property. The dependence of the laser shock flattening process on the laser energy density was investigated. The results revealed that the surface micro-defects on the LNed MG were significantly reduced after laser shock flattening, and accordingly, the surface roughness (Sa) was decreased, with a maximum reduction of 61.87% (from 0.48 to 0.183 μm) achieved at a relatively high laser energy density of 178.3 J/cm2. Furthermore, nanoindentation measurements indicated that although the surface hardness of the LNed MG was decreased after laser shock flattening, it was still higher than that of the as-cast MG.

  • Access to Document (DOI)

• Investigation of failure modes and material structural responses of nanographite coatings on single-crystal silicon by nanoscratching

  Brüssel F., Huang W., Yan J.

  Tribology International （Tribology International)  193 2024.05

  ISSN  0301679X

  　View Summary

  The failure modes of a nanographite-on-silicon system and the effects of the coating on the load-induced phase transformation of the silicon substrate were investigated using a series of nanoscratching tests with a spherical diamond indenter. The critical normal load for the failure of the nanographite coating was determined based on the thickness of the coating. When the load increased beyond the critical point, cracks, press spallation, and lift spallation were observed, and the silicon substrate underwent a phase transformation from the original crystalline phase to a mixture of amorphous, Si-III and Si-XII phases. For a thin coating, the silicon substrate was free of phase transformation owing to the coating protection. These findings provide guidance for glass molding and other applications.

  • Access to Document (DOI)

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Reviews, Commentaries, etc. 【 Display / hide 】

Reviews, Commentaries, etc. 【 Display / hide 】

• Laser polishing technologies for additive-manufactured metal products

  J. Yan

  Journal of the Japan Society for Abrasive Technology 67 ( 8 ) 440 - 443 2023.08

  Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author

• Ultraprecision ductile mode machining of hard brittle materials

  J. Yan

  Journal of the Japan Society of Mechanical Engineers 125 ( 1247 ) 11 - 14 2022.10

  Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author, Corresponding author

• Ultrasonic vibration-assisted grinding of carbon-based difficult-to-cut materials

  J. Yan

  Journal of the Japan Society for Precision Engineering 88 ( 7 ) 541 - 545 2022.07

  Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author, Corresponding author

• Electrochemical Machining on an EDM Machine for Fine Finishing of Micro Grooves

  J. Yan

  Die and Mould Technology 37 ( 4 ) 14 - 17 2022.04

  Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Joint Work, Lead author, Corresponding author

• EDM/Grinding Hybrid Machining of Single-crystal SiC using Poly-crystal Diamond Tools

  J. Yan

  Journal of the Japan Society for Abrasive Technology 65 ( 12 ) 650 - 653 2021.12

  Article, review, commentary, editorial, etc. (scientific journal), Single Work

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Presentations 【 Display / hide 】

Presentations 【 Display / hide 】

• Scale-bridging surface structuring for functional performance improvement of components

  J. Yan

  7th CIRP CSI Conference on Surface Integrity 2024 (ブレーメン) , 

  2024.05

  , 

  Oral presentation (keynote)

• Tool Dynamics-induced Surface Topography Error in Fast Tool Servo-Based Diamond Turning of Micro Dome Arrays

  T. Hashimoto, J. Yan

  7th CIRP CSI Conference on Surface Integrity 2024 (Bremen) , 

  2024.05

  , 

  Oral presentation (general)

• Influences of tool tip geometry on surface/subsurface damage formation in nanoscratching of single-crystal 4H-SiC

  W. Huang, J. Yan

  7th CIRP CSI Conference on Surface Integrity 2024 (Bremen) , 

  2024.05

  , 

  Oral presentation (general)

• Ultraprecision manufacturing for small optics

  J. Yan

  Nanotechnology and Precision Engineering (NPE) International Series Forum (Online) , 

  2024.04

  , 

  Oral presentation (invited, special)

• 自由曲面加工における工具姿勢に起因する切削メカニズム変化

  川上凜太朗，閻 紀旺

  精密工学会第31回学生会員卒業研究発表講演会 (東京) , 

  2024.03

  , 

  Oral presentation (general)

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Awards 【 Display / hide 】

Awards 【 Display / hide 】

• JSME Medal for Outstanding Paper

  L. Zhang, Y. Sato, J. Yan, 2024.04, The Japan Society of Mechanical Engineers, Optimization of fast tool servo diamond turning for enhancing geometrical accuracy and surface quality of freeform optics

  Type of Award： Award from Japanese society, conference, symposium, etc.

• IJEM Best Editor Award

  J. Yan, 2024.01, International Journal of Extreme Manufacturing (IJEM), IoP publishing

  Type of Award： Honored in official journal of a scientific society, scientific journal

• JSPE Best Paper Award

  Lin Zhang, Allen Yi, J. Yan, 2023.03, The Japan Society for Precision Engineering, Flexible fabrication of Fresnel micro-lens array by off-spindle-axis diamond turning and precision glass molding

  Type of Award： Award from Japanese society, conference, symposium, etc.

• 2022 IJEM Best Paper Award

  Y. Sato, J. Yan, 2023.03, International Journal of Extreme Manufacturing (IJEM), IoP publishing, Tool path generation and optimization for freeform surface diamond turning based on an independently controlled fast tool servo

  Type of Award： Honored in official journal of a scientific society, scientific journal

• Machine Tool Technology Promotion Award

  S. Kasai, T. Sodetai, J. Yan, 2021.06, 工作機械技術振興財団, 炭素拡散反応を用いた形彫り放電加工による多結晶ダイヤモンドの３次元形状創製

  Type of Award： Award from publisher, newspaper, foundation, etc.

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Courses Taught 【 Display / hide 】

Courses Taught 【 Display / hide 】

• ULTRAPRECISION MACHINING AND METROLOGY

  2024

• SPECIAL LECTURE SERIES ON MULTIDISCIPLINARY AND DESIGN SCIENCE

  2024

• LABORATORIES IN SCIENCE AND TECHNOLOGY

  2024

• INDEPENDENT STUDY ON INTEGRATED DESIGN ENGINEERING

  2024

• INDEPENDENT STUDIES IN MECHANICAL ENGINEERING

  2024

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Memberships in Academic Societies 【 Display / hide 】

Memberships in Academic Societies 【 Display / hide 】

• The Japan Society of Mechanical Engineers, 

  1997.04

  -

  Present

• The Japan Society for Precision Engineering, 

  1997.04

  -

  Present

• The Japan Society for Abrasive Technology, 

  2000.04

  -

  Present

• Japan Society for Applied Physics (JSAP), 

  2004.04

  -

  Present

• Japan Laser Processing Society (JLPS), 

  2009.01

  -

  Present

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Committee Experiences 【 Display / hide 】

Committee Experiences 【 Display / hide 】

• 2024.01

  -

  Present

  Associate Editor, Journal of Materials Processing Technology

• 2022.05

  -

  Present

  Director, Japan Society of Laser Technology (JSLT)

• 2022.03

  -

  Present

  Director, Executive Director, Chairman of Publication Sector, Chairman of Journal Review Board, Japan Society of Precision Engineering (JSPE)

• 2019.04

  -

  2022.03

  Journal Editorial Commitee Member, 日本機械学会

• 2019.01

  -

  Present

  Editorial Board Member, International Journal of Extreme Manufacturing

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