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Corrosion Fatigue Behavior of 316LN Stainless Steel Hollow Specimen in High-Temperature Pressurized Water
Tan Jibo; Wang Xiang; Wu Xinqiang; Han En-Hou
Corresponding AuthorWu Xinqiang(xqwu@imr.ac.cn)
2021-03-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume57Issue:3Pages:309-316
AbstractEnvironmentally assisted fatigue is an important factor in the design, safety review, and life management of key components used in nuclear power plants. Piping systems, valves, and small-bore pipes are sensitive to fatigue damage in nuclear power plants. In this work, a kind of hollow specimen for fatigue testing was designed. High-temperature pressurized water flows through the inside of the specimen, and the outside of the specimen is exposed to air. The corrosion fatigue behavior of 316LN stainless steel was investigated in high-temperature pressurized water using the hollow specimens. The experimental results show that the fatigue strength of 316LN stainless steel was reduced in a high-temperature pressurized water environment, and its fatigue life decreased with decreasing strain rate. The fatigue lives obtained by hollow and standard round bar specimens were comparable, which indicate that it is reasonable and feasible to use the hollow specimen to study the environmentally assisted fatigue performance of nuclear-grade structural materials in a high-temperature pressurized water environment. At low strain rate conditions, the fatigue crack initiation region is a typical fan-shaped pattern with quasi-cleavage cracking characteristics. The fatigue crack growth region is characterized by fatigue striation, and the environmental effects are highly significant in the stage of fatigue crack initiation. The fatigue damage mechanism of 316LN stainless steel in a high-temperature pressurized water environment is also discussed.
Keywordcorrosion fatigue high-temperature pressurized water stainless steel hollow specimen
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China
DOI10.11900/0412.1961.2020.00134
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFB0702103] ; National Natural Science Foundation of China[51671201]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000618643300005
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161049
Collection中国科学院金属研究所
Corresponding AuthorWu Xinqiang
AffiliationChinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Tan Jibo,Wang Xiang,Wu Xinqiang,et al. Corrosion Fatigue Behavior of 316LN Stainless Steel Hollow Specimen in High-Temperature Pressurized Water[J]. ACTA METALLURGICA SINICA,2021,57(3):309-316.
APA Tan Jibo,Wang Xiang,Wu Xinqiang,&Han En-Hou.(2021).Corrosion Fatigue Behavior of 316LN Stainless Steel Hollow Specimen in High-Temperature Pressurized Water.ACTA METALLURGICA SINICA,57(3),309-316.
MLA Tan Jibo,et al."Corrosion Fatigue Behavior of 316LN Stainless Steel Hollow Specimen in High-Temperature Pressurized Water".ACTA METALLURGICA SINICA 57.3(2021):309-316.
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