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Deformation and cracking behaviors of proton-irradiated 308L stainless steel weld metal strained in simulated PWR primary water
Lin, Xiaodong1,3; Peng, Qunjia2,3; Han, En-Hou3; Ke, Wei3
Corresponding AuthorPeng, Qunjia(pengqunjia@yahoo.com)
2022-09-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume120Pages:36-52
AbstractThe proton-irradiated 308L stainless steel weld metal was strained by using constant extension rate tensile testing in simulated PWR primary water, and its deformation microstructures and irradiation assisted stress corrosion cracking (IASCC) behavior were investigated. The results suggest that the irradiation significantly increases the SCC susceptibility of 308L weld metal and causes various deformation microstructures including lathy faulted planes, dislocation channels and deformation twins in austenite and atomic plane rotation in delta-ferrite. The propagation of intergranular IASCC cracks is closely related to the location of the crack tip. For the crack tip in the specimen matrix interior, localized deformation is likely the key factor responsible for the crack growth. For the crack tip close to the specimen surface, however, localized corrosion along the grain boundary rather than the localized deformation appears to dominate the crack propagation. Unlike the intergranular cracks, the IASCC cracks along the delta-ferrite/austenite phase boundary can initiate either by crack initiation at the phase boundary or by crack propagation from the grain boundary. In both cases, the cracked phase boundaries contain a large number of carbides and are severely corroded, but no deformation microstructures are observed, which implies that the localized corrosion may play an important role in the IASCC along the phase boundary. In addition, delta-ferrite can retard the IASCC crack propagation along the grain boundary, which is probably related to the reduction of localized deformation by delta-ferrite. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordStainless steel weld metal Proton irradiation Deformation microstructures Irradiation assisted stress corrosion cracking Grain and phase boundaries
Funding OrganizationJiangsu Natural Science Foundation ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation
DOI10.1016/j.jmst.2021.11.056
Indexed BySCI
Language英语
Funding ProjectJiangsu Natural Science Foundation[BK20191178] ; National Natural Science Foundation of China[52071018] ; China Postdoctoral Science Foundation[2021M692018]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000788171300004
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172723
Collection中国科学院金属研究所
Corresponding AuthorPeng, Qunjia
Affiliation1.Shanghai Univ, Inst Mat, Shanghai 200072, Peoples R China
2.Suzhou Nucl Power Res Inst, Suzhou 215004, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Lin, Xiaodong,Peng, Qunjia,Han, En-Hou,et al. Deformation and cracking behaviors of proton-irradiated 308L stainless steel weld metal strained in simulated PWR primary water[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,120:36-52.
APA Lin, Xiaodong,Peng, Qunjia,Han, En-Hou,&Ke, Wei.(2022).Deformation and cracking behaviors of proton-irradiated 308L stainless steel weld metal strained in simulated PWR primary water.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,120,36-52.
MLA Lin, Xiaodong,et al."Deformation and cracking behaviors of proton-irradiated 308L stainless steel weld metal strained in simulated PWR primary water".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 120(2022):36-52.
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