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Motomichi Koyama

Assistant Professor

  • 1988 Citations
  • 25 h-Index
20072019
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Research Output 2007 2019

ECCI Characterization of Dislocation Structures at a Non-propagating Fatigue Crack Tip: Toward Understanding the Effects of Mn-C and Cr-N Couples on Crack Growth Resistance

Habib, K., Koyama, M., Tsuchiyma, T. & Noguchi, H., Jan 1 2019, In : Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 50, 1, p. 426-435 10 p.

Research output: Contribution to journal › Article

Steel
crack tips
Crack tips
Crack propagation
cracks

Fatigue behavior in an Fe-N binary ferritic steel: Similarity and difference between carbon and nitrogen

Habib, K., Koyama, M., Sakurada, E., Yoshimura, N., Yokoi, T., Ushioda, K., Tsuzaki, K. & Noguchi, H., Jan 1 2019, In : isij international. 59, p. 186-191 6 p.

Research output: Contribution to journal › Article

Fatigue Resistance of Laminated and Non-laminated TRIP-maraging Steels: Crack Roughness vs Tensile Strength

Zhang, Z., Koyama, M., Wang, M., Tasan, C. C. & Noguchi, H., Jan 1 2019, (Accepted/In press) In : Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science.

Research output: Contribution to journal › Article

maraging steels
Maraging steel
plastic properties
tensile strength
Plasticity

Lowering Strain Rate Simultaneously Enhances Carbon- and Hydrogen-Induced Mechanical Degradation in an Fe-33Mn-1.1C Steel

Tuğluca, I. B., Koyama, M., Shimomura, Y., Bal, B., Canadinc, D., Akiyama, E. & Tsuzaki, K., Jan 1 2019, (Accepted/In press) In : Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science.

Research output: Contribution to journal › Article

Steel
strain rate
Strain rate
Hydrogen
Carbon

Phase Stability Effects on Hydrogen Embrittlement Resistance in Martensite–Reverted Austenite Steels

Cameron, B. C., Koyama, M. & Tasan, C. C., Jan 1 2019, In : Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 50, 1, p. 29-34 6 p.

Research output: Contribution to journal › Article

hydrogen embrittlement
Hydrogen embrittlement
Phase stability
Steel
austenite