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A nanotwinned austenite stainless steel with high hydrogen embrittlement resistance
Fan, Y. H.2; Cui, F.1,2; Lu, L.1; Zhang, B.1
Corresponding AuthorZhang, B.(bxz011@imr.ac.cn)
2019-06-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume788Pages:1066-1075
AbstractA 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.
KeywordAustenite Stainless steel Nanotwin Hydrogen embrittlement TEM
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.jallcom.2019.02.312
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[U1608257]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000462767000125
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/132648
Collection中国科学院金属研究所
Corresponding AuthorZhang, B.
Affiliation1.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
Recommended Citation
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.
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