Effect of grain refinement on hydrogen embrittlement behaviors of high-Mn TWIP steel

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:651

Article

Bai, Y.¹  Momotani, Y.¹  Chen, M. C.¹  Shibata, A.^1,2  Tsuji, N.^1,2 

[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan

[2] Kyoto Univ, ESISM, Sakyo Ku, Kyoto 6068501, Japan

关键词: Twinning induced plasticity (TWIP) steel;    Grain refinement;    Tensile property;    Hydrogen embrittlement;    Grain boundary;   

DOI  :  10.1016/j.msea.2015.11.017

来源: Elsevier

【 摘 要 】

Hydrogen embrittlement behaviors of a high-Mn TWIP (twinning induced plasticity) steel with various grain sizes from coarse grains to ultra-fine grains were studied by hydrogen pre-charging and subsequent slow stain rate tensile tests. The results of the tensile tests showed that the yield strength and tensile strength were not influenced by hydrogen-charging, whereas the total elongation reduced with hydrogen-charging in coarse-grained specimen but no change in the ultrafine-grained specimen. Fracture surfaces showed dimple patterns in all specimens. The present results suggested that the grain refinement suppressed hydrogen embrittlement in the high-Mn TWIP steel, even though the diffusible hydrogen content increased by grain refinement. (c) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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