Positive and negative effects of hydrogen on tensile behavior in polycrystalline Fe-30Mn-(6-x)Si-xAl austenitic alloys

SCRIPTA MATERIALIA

卷:105

Article

Yamada, Kensuke¹  Koyama, Motomichi¹  Kaneko, Takahiro¹  Tsuzaki, Kaneaki^1,2 

[1] Kyushu Univ, Nishi Ku, Fukuoka 8190395, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

关键词: Martensitic phase transformation;    Hydrogen embrittlement;    Tension test;    Twinning;    Austenitic steel;   

DOI  :  10.1016/j.scriptamat.2015.05.007

来源: Elsevier

【 摘 要 】

We investigated the tensile properties of Fe-30Mn-(6 - x)Si-xAl (in wt.%, x = 0, 2, 3, 6) austenitic alloys precharged with hydrogen gas at 10 MPa. The Fe-30Mn-6Al alloy showed hydrogen-improved elongation through enhancement of work hardening capacity in the plastic instability condition, although the other alloys did not. This improvement in elongation is considered to be a result of a reduction in stacking fault energy because deformation twinning appeared only in the hydrogen-precharged condition. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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