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Numerical Investigation on Residual Stresses of the Safe-End/Nozzle Dissimilar Metal Welded Joint in CAP1400 Nuclear Power Plants
Dong, Wen-Chao; Gao, Dian-Bao; Lu, Shan-Ping
2019-05-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume32Issue:5Pages:618-628
AbstractThe residual stress evolution in a safe-end/nozzle dissimilar metal welded joint of CAP1400 nuclear power plants was investigated in the manufacturing process by finite element simulation. A finite element model, including cladding, buttering, post-weld heat treatment (PWHT) and dissimilar metal multi-pass welding, is developed based on SYSWELD software to investigate the evolution of residual stress in the aforementioned manufacturing process. The results reveal a large tensile axial residual stress, which exists at the weld zone on the inner surface, leads to a high sensitivity to stress corrosion cracking (SCC). PWHT process before dissimilar metal multi-pass welding process has a great influence on the magnitude and distribution of final axial residual stress. The risk of SCC on the inner surface of the pipe will increase if PWHT process is not taken into account. Therefore, such crucial thermal manufacturing process such as cladding, buttering and post-weld heat treatment, besides the multi-pass welding process, should be considered in the numerical model in order to accurately predict the distribution and the magnitude of the residual stress.
KeywordCAP1400 nuclear power plants Nozzle Safe-end Dissimilar metal welding Residual stress
Indexed BySCI
Language英语
WOS IDWOS:000463780700009
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81139
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Dong, Wen-Chao,Gao, Dian-Bao,Lu, Shan-Ping. Numerical Investigation on Residual Stresses of the Safe-End/Nozzle Dissimilar Metal Welded Joint in CAP1400 Nuclear Power Plants[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(5):618-628.
APA Dong, Wen-Chao,Gao, Dian-Bao,&Lu, Shan-Ping.(2019).Numerical Investigation on Residual Stresses of the Safe-End/Nozzle Dissimilar Metal Welded Joint in CAP1400 Nuclear Power Plants.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(5),618-628.
MLA Dong, Wen-Chao,et al."Numerical Investigation on Residual Stresses of the Safe-End/Nozzle Dissimilar Metal Welded Joint in CAP1400 Nuclear Power Plants".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.5(2019):618-628.
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