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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
Source PublicationMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN0921-5093
Volume594Pages:98-102
AbstractThe 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.
description.department[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
KeywordPrecipitation 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
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72535
Collection中国科学院金属研究所
Recommended Citation
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.
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