Revisiting the effects of hydrogen on deformation-induced γ-ε martensitic transformation
Revisiting the effects of hydrogen on deformation-induced γ-ε martensitic transformation
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DOI：
10.1016/j.matlet.2019.04.093
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发表时间：
2019-08-15
影响因子：
3
通讯作者：
Tsuzaki, Kaneaki
中科院分区：
文献类型：
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作者：
Koyama, Motomichi;Terao, Natsuki;Tsuzaki, Kaneaki
从变形奥氏体钢中ε-马氏体的形态、数量密度和分数等方面重新探讨了氢对变形诱导的γ - ε马氏体转变的影响。充氢在应力准则下抑制了马氏体的应力辅助形核，这与先前氢抑制热诱导的γ - ε马氏体转变的发现一致。在相同应变（例如4%）下，充氢会减小ε-马氏体片的平均厚度，但会增加其数量密度。因此，在相同应变下比较时，充氢促进了变形诱导的γ - ε马氏体转变。这些事实得出以下两个结论：（1）氢增加了马氏体形核所需的弹性应变能；（2）氢促进了与位错运动相关的形核过程。（C）2019爱思唯尔有限公司。保留所有权利。
Hydrogen effects on deformation-induced gamma-epsilon martensitic transformation were revisited in terms of morphology, number density, and fraction of epsilon-martensite in strained austenitic steel. Hydrogen charging suppresses the stress-assisted nucleation of the martensite in stress criterion, which is consistent with a previous finding that hydrogen suppresses thermally induced gamma-epsilon martensitic transformation. At an identical strain (e.g., 4%), hydrogen charging decreases the average thickness of epsilon-martensite plates, but increases their number density. As a result, hydrogen charging promotes deformation-induced gamma-epsilon martensitic transformation when compared at the identical strain. These facts provide the following two conclusions: (1) hydrogen increases the required elastic strain energy for martensite nucleation and (2) hydrogen promotes a dislocation-motion-related nucleation process. (C) 2019 Elsevier B.V. All rights reserved.