Effect of grain size on the hydrogen embrittlement sensitivity of a precipitation strengthened Fe-Ni based alloy

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	Effect of grain size on the hydrogen embrittlement sensitivity of a precipitation strengthened Fe-Ni based alloy
	S. H. Chen; M. J. Zhao; L. J. Rong
	2014
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	594 页码:98-102
摘要	The hydrogen embrittlement (HE) sensitivity of a precipitation strengthened Fe-Ni based alloy with various grain sizes was investigated by hot hydrogen charging experiment and tensile test. The results showed that HE sensitivity was reduced with decreasing grain size, even though the hydrogen concentration in the small-grained specimen was higher than the large-grained specimen. Fractographic features showed that intergranular fracture was less pronounced with decreasing grain size, which was related to the transport of hydrogen to the grain boundary by moving dislocations. During deformation, the number of dislocations expected in the slip bands was proportional to the grain size, leading to that a lower hydrogen concentration being accumulated at the grain boundary in the small-grained specimen. (C) 2013 Elsevier B.V. All rights reserved.
部门归属	[chen, shenghu ; zhao, mingjiu ; rong, lijian] chinese acad sci, inst met res, div mat special environm, shenyang 110016, peoples r china. ; chen, sh (reprint author), chinese acad sci, inst met res, div mat special environm, 72 wenhua rd, shenyang 110016, peoples r china. ; chensh@imr.ac.cn
关键词	Precipitation Strengthened Fe-ni Based Alloy Hydrogen Embrittlement Sensitivity Grain Size Intergranular Fracture Hydrogen Concentration Mechanical-properties Iron-base Behavior Superalloys Fracture Nickel Microstructure Dislocations Performance Boundary
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72535
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. H. Chen,M. J. Zhao,L. J. Rong. Effect of grain size on the hydrogen embrittlement sensitivity of a precipitation strengthened Fe-Ni based alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2014,594:98-102.
APA	S. H. Chen,M. J. Zhao,&L. J. Rong.(2014).Effect of grain size on the hydrogen embrittlement sensitivity of a precipitation strengthened Fe-Ni based alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,594,98-102.
MLA	S. H. Chen,et al."Effect of grain size on the hydrogen embrittlement sensitivity of a precipitation strengthened Fe-Ni based alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 594(2014):98-102.