Mechanism of hydrogen embrittlement in a gamma-prime phase strengthened Fe-Ni based austenitic alloy

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	Mechanism of hydrogen embrittlement in a gamma-prime phase strengthened Fe-Ni based austenitic alloy
	Z. F. Guo; M. J. Zhao; C. F. Li; S. H. Chen; L. J. Rong
	2012
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	555 页码:77-84
摘要	The mechanism of hydrogen embrittlement (HE) in a gamma'-Ni-3(Al,Ti) phase strengthened Fe-Ni based austenitic alloy has been investigated in detail. Hot hydrogen charging experiment and tensile test reveal that the alloy with coherent gamma' phase exhibits a much higher decrease in reduction of area (RA) than that of the alloy in the solution-treated state. However, three-dimensional atom probe (3DAP) experiment shows that segregation of hydrogen atoms is not found at the coherent interface between the gamma' phase and the matrix, which indicates that the interface is not a strong hydrogen trap. Furthermore, high-resolution transmission electron microscopy (TEM) observation indicates that the interface coherency is maintained during the deformation, even tensile to fracture. It is found that macroscale slip band rupture and intergranular fracture are promoted by serious dislocation planar slip, which become the predominant features in the tensile-to-fracture sample after hydrogen charging. This phenomenon has been interpreted as a result of combined effects of the gamma' phase and hydrogen in the precipitation-strengthened Fe-Ni based austenitic alloy. (C) 2012 Elsevier B.V. All rights reserved.
部门归属	[rong, lijian] chinese acad sci, inst met res, div mat special environm, shenyang 110016, peoples r china.;rong, lj (reprint author), chinese acad sci, inst met res, div mat special environm, 72 wenhua rd, shenyang 110016, peoples r china.;ljrong@imr.ac.cn
关键词	Hydrogen Embrittlement Gamma ' Phase Coherent Interface Planar Slip Planar Slip Bands Stainless-steels Plastic-deformation Low-temperatures Iron-base Fracture Microstructure Nickel Dislocations Performance
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/59983
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. F. Guo,M. J. Zhao,C. F. Li,et al. Mechanism of hydrogen embrittlement in a gamma-prime phase strengthened Fe-Ni based austenitic alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,555:77-84.
APA	Z. F. Guo,M. J. Zhao,C. F. Li,S. H. Chen,&L. J. Rong.(2012).Mechanism of hydrogen embrittlement in a gamma-prime phase strengthened Fe-Ni based austenitic alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,555,77-84.
MLA	Z. F. Guo,et al."Mechanism of hydrogen embrittlement in a gamma-prime phase strengthened Fe-Ni based austenitic alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 555(2012):77-84.