A nanotwinned austenite stainless steel with high hydrogen embrittlement resistance

doi:10.1016/j.jallcom.2019.02.312

CORC > 金属研究所 > 中国科学院金属研究所

	A nanotwinned austenite stainless steel with high hydrogen embrittlement resistance
	Fan, Y. H.2; Cui, F.1,2; Lu, L.1; Zhang, B.1
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-06-05
卷号	788 页码:1066-1075
关键词	Austenite Stainless steel Nanotwin Hydrogen embrittlement TEM
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.02.312
通讯作者	Zhang, B.(bxz011@imr.ac.cn)
英文摘要	A nanotwinned 304 steel with a favorable combination of strength and ductility has been made in this work through the dynamic plastic deformation (DPD) treatment followed by a proper heat treatment. The DPD, DPD-annealed and coarse grain (CG) 304 samples were tensile tested with slow strain rate under electrochemical hydrogen charging condition. Compared with CG sample, DPD-annealed sample with a mixed structure of nanotwins (41% volume fraction), recrystallization grain (RXG, 32% volume fraction) and dislocation structures (27% volume fraction) possesses a high HE resistance. Hydrogen causes a 12.5% reduction in yield strength and 5.4% reduction in tensile strength of DPD-annealed sample because hydrogen enhances dislocations/twin boundaries (TBs) interactions and the subsequent dislocation mobility during the TB-mediated slip transfer. Hydrogen charging also causes a 41% reduction in strain induced martensite of DPD-annealed sample. Strain localization is supposed to be mitigated by the bundle form of TBs and the micro-sized RXGs, accounting for the high HE resistance of DPD-annealed alloy. Our findings suggest a new strategy to design high strength alloys with low HE susceptibility. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[U1608257]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000462767000125
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/132647]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, B.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Fan, Y. H.,Cui, F.,Lu, L.,et al. A nanotwinned austenite stainless steel with high hydrogen embrittlement resistance[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,788:1066-1075.
APA	Fan, Y. H.,Cui, F.,Lu, L.,&Zhang, B..(2019).A nanotwinned austenite stainless steel with high hydrogen embrittlement resistance.JOURNAL OF ALLOYS AND COMPOUNDS,788,1066-1075.
MLA	Fan, Y. H.,et al."A nanotwinned austenite stainless steel with high hydrogen embrittlement resistance".JOURNAL OF ALLOYS AND COMPOUNDS 788(2019):1066-1075.