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The role of reversed austenite in hydrogen embrittlement fracture of S41500 martensitic stainless steel
Fan, Y. H.; Zhang, B.; Yi, H. L.; Hao, G. S.; Sun, Y. Y.; Wang, J. Q.; Han, E. -H.; Ke, W.; Zhang, B (reprint author), 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China.
2017-10-15
Source PublicationPERGAMON-ELSEVIER SCIENCE LTD
ISSN1359-6454
Volume139Pages:188-195
AbstractUp to now, the precise role of reversed austenite (RA) in hydrogen embrittlement (HE) of steel is still not fully understood. This work presents new observations and interpretation of fracture surface features immediately beneath the fracture surface for 541500 martensitic stainless steels (MSS) with aim to reveal the role of RA in HE resistance. The MSS were tensile tested with slow strain rate under electrochemical hydrogen charging condition. Steel containing more RA was found to have less hydrogen embrittlement susceptibility. Focused ion beam (FIB) was used to prepare sample for TEM observation of fracture path after HE fracture. It clearly shows that RA near the fracture surface has transformed to the newly formed martensite (NFM) and cracking occurs along both the tempered martensite/NFM boundaries and the lath boundaries. Three dimension atom probe (3DAP) confirms that RA is the H trapping site. Thus the beneficial role of RA is that it can act as a stable hydrogen trapping site which can increase the HE resistance by reducing hydrogen content at lath and grain boundaries. But its beneficial effect should not be overestimated since cracking along tempered martensite/NFM boundaries can occur after martensitic transformation as a result of hydrogen redistribution. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; Up to now, the precise role of reversed austenite (RA) in hydrogen embrittlement (HE) of steel is still not fully understood. This work presents new observations and interpretation of fracture surface features immediately beneath the fracture surface for 541500 martensitic stainless steels (MSS) with aim to reveal the role of RA in HE resistance. The MSS were tensile tested with slow strain rate under electrochemical hydrogen charging condition. Steel containing more RA was found to have less hydrogen embrittlement susceptibility. Focused ion beam (FIB) was used to prepare sample for TEM observation of fracture path after HE fracture. It clearly shows that RA near the fracture surface has transformed to the newly formed martensite (NFM) and cracking occurs along both the tempered martensite/NFM boundaries and the lath boundaries. Three dimension atom probe (3DAP) confirms that RA is the H trapping site. Thus the beneficial role of RA is that it can act as a stable hydrogen trapping site which can increase the HE resistance by reducing hydrogen content at lath and grain boundaries. But its beneficial effect should not be overestimated since cracking along tempered martensite/NFM boundaries can occur after martensitic transformation as a result of hydrogen redistribution. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[fan, y. h. ; zhang, b. ; wang, j. q. ; han, e. -h. ; ke, w.] chinese acad sci, inst met res, cas key lab nucl mat & safety assessment, shenyang 110016, liaoning, peoples r china ; [fan, y. h.] univ sci & technol china, sch mat sci & engn, shenyang 110016, liaoning, peoples r china ; [yi, h. l. ; hao, g. s. ; sun, y. y.] shenyang blower works grp corp, shenyang 110869, liaoning, peoples r china
KeywordReversed Austenite Hydrogen Embrittlement 3dap Fib Tem
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [U1608257]
Indexed BySCI
Language英语
WOS IDWOS:000413381700017
Citation statistics
Cited Times:34[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79043
Collection中国科学院金属研究所
Corresponding AuthorZhang, B (reprint author), 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Fan, Y. H.,Zhang, B.,Yi, H. L.,et al. The role of reversed austenite in hydrogen embrittlement fracture of S41500 martensitic stainless steel[J]. PERGAMON-ELSEVIER SCIENCE LTD,2017,139:188-195.
APA Fan, Y. H..,Zhang, B..,Yi, H. L..,Hao, G. S..,Sun, Y. Y..,...&Zhang, B .(2017).The role of reversed austenite in hydrogen embrittlement fracture of S41500 martensitic stainless steel.PERGAMON-ELSEVIER SCIENCE LTD,139,188-195.
MLA Fan, Y. H.,et al."The role of reversed austenite in hydrogen embrittlement fracture of S41500 martensitic stainless steel".PERGAMON-ELSEVIER SCIENCE LTD 139(2017):188-195.
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