Numerical Investigation on Residual Stresses of the Safe-End/Nozzle Dissimilar Metal Welded Joint in CAP1400 Nuclear Power Plants

doi:10.1007/s40195-018-0803-8

IMR OpenIR

	Numerical Investigation on Residual Stresses of the Safe-End/Nozzle Dissimilar Metal Welded Joint in CAP1400 Nuclear Power Plants
	Dong, Wen-Chao 1; Gao, Dian-Bao 2; Lu, Shan-Ping 1
通讯作者	Lu, Shan-Ping(shplu@imr.ac.cn)
	2019-05-01
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
卷号	32 期号:5 页码:618-628
摘要	The 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.
关键词	CAP1400 nuclear power plants Nozzle Safe-end Dissimilar metal welding Residual stress
资助者	Open-ended Fund of the CAS Key Laboratory of Nuclear Materials and Safety Assessment
DOI	10.1007/s40195-018-0803-8
收录类别	SCI
语种	英语
资助项目	Open-ended Fund of the CAS Key Laboratory of Nuclear Materials and Safety Assessment[2015NMSAKF02]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000463780700009
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/132983
专题	中国科学院金属研究所
通讯作者	Lu, Shan-Ping
作者单位	1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China 2.China First Heavy Ind, Nucl Power & Petrochem Business Grp, Dalian 116113, Peoples R China
推荐引用方式 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.