Hydrogen-induced cracking at grain and twin boundaries in an Fe-Mn-C austenitic steel

被引：183

作者：

Koyama, Motomichi ^{[1
,2
]}

Akiyama, Eiji ^{[1
]}

Sawaguchi, Takahiro ^{[1
]}

Raabe, Dierk ^{[3
]}

Tsuzaki, Kaneaki ^{[1
,2
]}

机构：

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

[2] Univ Tsukuba, Doctoral Program Mat Sci & Engn, Tsukuba, Ibaraki 3050047, Japan

[3] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

来源：

SCRIPTA MATERIALIA | 2012年 / 66卷 / 07期

基金：

日本学术振兴会;

关键词：

Austenitic steel; Tension test; Electron backscattering; Hydrogen embrittlement; Twinning; TRANSFORMATION-INDUCED PLASTICITY; HADFIELD MANGANESE STEEL; STACKING-FAULT ENERGY; SHAPE-MEMORY ALLOYS; STAINLESS-STEEL; MARTENSITIC-TRANSFORMATION; MECHANICAL-PROPERTIES; DEFORMATION; BEHAVIOR; TRANSPORT;

D O I：

10.1016/j.scriptamat.2011.12.015

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hydrogen embrittlement was observed in an Fe-18Mn-1.2C (wt.%) steel. The tensile ductility was drastically reduced by hydrogen charging during tensile testing. The fracture mode was mainly intergranular fracture, though transgranular fracture was also partially observed. The transgranular fracture occurred parallel to the primary and secondary deformation twin boundaries, as confirmed by electron backscattering diffraction analysis and orientation-optimized electron channeling contrast imaging. The microstructural observations indicate that cracks are initiated at grain boundaries and twin boundaries. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：459 / 462

页数：4

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