| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7976360 | Materials Science and Engineering: A | 2017 | 10 Pages |
Abstract
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.
Keywords
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Y. Bai, Y. Momotani, M.C. Chen, A. Shibata, N. Tsuji,