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Motomichi Koyama
Motomichi Koyama
Tohoku University, IMR
Verifisert e-postadresse på imr.tohoku.ac.jp
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An overview of dual-phase steels: advances in microstructure-oriented processing and micromechanically guided design
CC Tasan, M Diehl, D Yan, M Bechtold, F Roters, L Schemmann, C Zheng, ...
Annual Review of Materials Research 45 (1), 391-431, 2015
7102015
Hydrogen-assisted decohesion and localized plasticity in dual-phase steel
M Koyama, CC Tasan, E Akiyama, K Tsuzaki, D Raabe
Acta Materialia 70, 174-187, 2014
4512014
Bone-like crack resistance in hierarchical metastable nanolaminate steels
M Koyama, Z Zhang, M Wang, D Ponge, D Raabe, K Tsuzaki, H Noguchi, ...
Science 355 (6329), 1055-1057, 2017
3522017
Overview of hydrogen embrittlement in high-Mn steels
M Koyama, E Akiyama, YK Lee, D Raabe, K Tsuzaki
international journal of hydrogen energy 42 (17), 12706-12723, 2017
2922017
Hydrogen-assisted failure in a twinning-induced plasticity steel studied under in situ hydrogen charging by electron channeling contrast imaging
M Koyama, E Akiyama, K Tsuzaki, D Raabe
Acta Materialia 61 (12), 4607-4618, 2013
2702013
Alloy design, combinatorial synthesis, and microstructure–property relations for low-density Fe-Mn-Al-C austenitic steels
D Raabe, H Springer, I Gutiérrez-Urrutia, F Roters, M Bausch, JB Seol, ...
Jom 66, 1845-1856, 2014
2472014
Work hardening associated with ɛ-martensitic transformation, deformation twinning and dynamic strain aging in Fe–17Mn–0.6 C and Fe–17Mn–0.8 C TWIP steels
M Koyama, T Sawaguchi, T Lee, CS Lee, K Tsuzaki
Materials Science and Engineering: A 528 (24), 7310-7316, 2011
2252011
Hydrogen embrittlement associated with strain localization in a precipitation-hardened Fe–Mn–Al–C light weight austenitic steel
M Koyama, H Springer, SV Merzlikin, K Tsuzaki, E Akiyama, D Raabe
international journal of hydrogen energy 39 (9), 4634-4646, 2014
2172014
Hydrogen-induced cracking at grain and twin boundaries in an Fe–Mn–C austenitic steel
M Koyama, E Akiyama, T Sawaguchi, D Raabe, K Tsuzaki
Scripta Materialia 66 (7), 459-462, 2012
2122012
Recent progress in microstructural hydrogen mapping in steels: quantification, kinetic analysis, and multi-scale characterisation
M Koyama, M Rohwerder, CC Tasan, A Bashir, E Akiyama, K Takai, ...
Materials Science and Technology 33 (13), 1481-1496, 2017
2112017
Hydrogen embrittlement in a Fe–Mn–C ternary twinning-induced plasticity steel
M Koyama, E Akiyama, K Tsuzaki
Corrosion Science 54, 1-4, 2012
1652012
Effect of hydrogen content on the embrittlement in a Fe–Mn–C twinning-induced plasticity steel
M Koyama, E Akiyama, K Tsuzaki
Corrosion Science 59, 277-281, 2012
1242012
Hydrogen-assisted quasi-cleavage fracture in a single crystalline type 316 austenitic stainless steel
M Koyama, E Akiyama, T Sawaguchi, K Ogawa, IV Kireeva, ...
Corrosion Science 75, 345-353, 2013
1142013
Mechanism of reversible transformation-induced plasticity of Fe–Mn–Si shape memory alloys
T Sawaguchi, LG Bujoreanu, T Kikuchi, K Ogawa, M Koyama, ...
Scripta Materialia 59 (8), 826-829, 2008
1082008
Effect of strain rate on hydrogen embrittlement susceptibility of twinning-induced plasticity steel pre-charged with high-pressure hydrogen gas
B Bal, M Koyama, G Gerstein, HJ Maier, K Tsuzaki
international journal of hydrogen energy 41 (34), 15362-15372, 2016
1022016
In situ observations of silver-decoration evolution under hydrogen permeation: Effects of grain boundary misorientation on hydrogen flux in pure iron
M Koyama, D Yamasaki, T Nagashima, CC Tasan, K Tsuzaki
Scripta Materialia 129, 48-51, 2017
1012017
Comparative study of hydrogen embrittlement in stable and metastable high-entropy alloys
K Ichii, M Koyama, CC Tasan, K Tsuzaki
Scripta Materialia 150, 74-77, 2018
1002018
Spatially and kinetically resolved mapping of hydrogen in a twinning-induced plasticity steel by use of scanning Kelvin probe force microscopy
M Koyama, A Bashir, M Rohwerder, SV Merzlikin, E Akiyama, K Tsuzaki, ...
Journal of The Electrochemical Society 162 (12), C638, 2015
972015
Enhancing hydrogen embrittlement resistance of lath martensite by introducing nano-films of interlath austenite
M Wang, CC Tasan, M Koyama, D Ponge, D Raabe
Metallurgical and Materials Transactions A 46, 3797-3802, 2015
952015
First-principles study on hydrogen diffusivity in BCC, FCC, and HCP iron
K Hirata, S Iikubo, M Koyama, K Tsuzaki, H Ohtani
Metallurgical and materials transactions A 49, 5015-5022, 2018
922018
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Artikler 1–20