Effect of strain-induced martensite on hydrogen embrittlement of austenitic stainless steels investigated by combined tension and hydrogen release methods
Effect of strain-induced martensite on hydrogen embrittlement of austenitic stainless steels investigated by combined tension and hydrogen release methods
复制标题
DOI：
10.1016/j.ijhydene.2013.01.198
复制
发表时间：
2013-06-27
影响因子：
7.2
通讯作者：
Li, Xiao
中科院分区：
文献类型：
--
作者：
Zhang, Lin;Li, Zhiyuan;Li, Xiao
通过拉伸和放气联合实验，研究了充氢304和316不锈钢在变形过程中的氢迁移行为和氢脆行为。在473 K、30 Mpa氢气中热充氢48h，充氢304钢的He随预应变的增加而减小，而充氢316钢的He几乎为零。208K时预应变形成的应变诱发α‘马氏体与HE关系不大，而预应变后变形过程中形成的动态α’马氏体具有明显的HE特征。α‘马氏体和奥氏体(伽马体)之间氢的扩散率和溶解度的差异导致氢从动态的α’马氏体扩散，然后在富α‘区和富伽马区的交界处聚集，导致在富α’区和富伽马区交界处的裂纹萌生。版权所有(C)2013，氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
The hydrogen transport behavior together with hydrogen embrittlement (HE) in hydrogen-charged type 304 and 316 stainless steels during deformation was investigated by combined tension and outgassing experiments. The specimens were thermally hydrogen-charged in 30 MPa hydrogen at 473 K for 48 h. HE of hydrogen-charged type 304 steel decreases with increasing prestrain and almost no HE is observed in hydrogen-charged type 316 steel. Prior strain-induced alpha' martensite formed by the prestrain at 208 K has little relation with HE, while dynamic alpha' martensite formed during deformation after the prestrain shows obvious HE. The differences in hydrogen diffusivity and solubility between alpha' martensite and austenite (gamma) induce hydrogen diffusion from dynamic alpha' martensite and then its accumulation at the boundary between the alpha'-rich and gamma-rich zones, resulting in crack initiation at the boundary between the alpha'-rich and gamma-rich zones. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.