Hydrogen embrittlement susceptibility of a Ni-16Mo-7Cr base superalloy

doi:10.1016/j.msea.2018.07.077

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Hydrogen embrittlement susceptibility of a Ni-16Mo-7Cr base superalloy
	Han, FF; He, SX; Liu, M; Zhou, XT
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2018
卷号	733 期号:-页码:291-298
关键词	STRESS RUPTURE PROPERTIES NICKEL-BASED SUPERALLOY TERM THERMAL EXPOSURE GRAIN-BOUNDARY GH3535 SUPERALLOY INDUCED CRACKING ALLOY TEMPERATURE FRACTURE MICROSTRUCTURE
ISSN号	0921-5093
DOI	10.1016/j.msea.2018.07.077
文献子类	期刊论文
英文摘要	This study investigated the hydrogen embrittlement sensitivity of a Ni-16Mo-7Cr base superalloy under different hydrogen pre-charging states. Detailed electromicroscopy characterization has been employed on the hydrogen pre-charged alloy after tensile testing to understand the mechanism of hydrogen-assisted cracking. The results show that the tensile strength of the alloy is remarkably decreased with the increasing of hydrogen pre-charging time, whereas the yield strength remains stable all the time. The fractographic study combined with ECCI analysis by Scanning Electron Microscopy demonstrates that the cracks propagated predominantly along the grain boundary in the presence of hydrogen, and a few can propagate along planar dislocation slip bands (DSBs) especially along the intersections between nonparallel DSBs. The proposed hydrogen embrittlement mechanism for the Ni-16Mo-7Cr base superalloy is that the coalescence and widening of the nano-voids, which are resulted from the interaction between the hydrogen and dislocations, cause the crack initiation and propagation along the grain boundary, and further cause the alloy intergranular fracture.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/30976]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	Chinese Acad Sci, Thorium Molten Salts Reactor Ctr, Shanghai Inst Appl Phys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Han, FF,He, SX,Liu, M,et al. Hydrogen embrittlement susceptibility of a Ni-16Mo-7Cr base superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,733(-):291-298.
APA	Han, FF,He, SX,Liu, M,&Zhou, XT.(2018).Hydrogen embrittlement susceptibility of a Ni-16Mo-7Cr base superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,733(-),291-298.
MLA	Han, FF,et al."Hydrogen embrittlement susceptibility of a Ni-16Mo-7Cr base superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 733.-(2018):291-298.