Investigation on low cycle fatigue properties of CLAM steel electron beam welded joint at 550 degrees C

doi:10.1016/j.fusengdes.2021.112260

	Investigation on low cycle fatigue properties of CLAM steel electron beam welded joint at 550 degrees C
	Cui, Kaixuan 1,2; Zhao, Yanyun 1; Liang, Mengtian 1,2; Huang, Bo 1; Huang, Qunying 1
刊名	FUSION ENGINEERING AND DESIGN
	2021-04-01
卷号	165
关键词	Low cycle fatigue Electron beam welding CLAM steel Fracture Dislocation
ISSN号	0920-3796
DOI	10.1016/j.fusengdes.2021.112260
通讯作者	Huang, Bo(bo.huang@fds.org.cn)
英文摘要	The low cycle fatigue (LCF) properties of structural materials at high temperatures are important for operational safety of fusion reactors. In this work, the investigation on LCF properties of CLAM steel joints welded by electron beam was conducted at strain amplitudes varying from 0.2 % to 0.7 % at 550 degrees C. It is found that the fatigue life and cyclic stress response of welded joints are lower than those of base metal. Continuous cyclic softening is observed in welded joints and base metal during LCF test. A majority of the fatigue cracks initiated at the surface of the the welded joint specimen with several initiation sites and propagated in a transgranular mode. The area of the crack propagation region decreased and the fatigue striation spacing increased with increasing strain amplitude. The cyclic softening is attributed to the coarsening of martensite laths and the reduction in dislocation density.
资助项目	National Key Research and Development Plan of China[2018YFE0306100] ; National Key Research and Development Plan of China[2017YFE0300601] ; Provincial Key Research Plan of Anhui[1704a0902021]
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000632660000001
资助机构	National Key Research and Development Plan of China ; Provincial Key Research Plan of Anhui
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/121421]
专题	中国科学院合肥物质科学研究院
通讯作者	Huang, Bo
作者单位	1.Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Hefei 230027, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Cui, Kaixuan,Zhao, Yanyun,Liang, Mengtian,et al. Investigation on low cycle fatigue properties of CLAM steel electron beam welded joint at 550 degrees C[J]. FUSION ENGINEERING AND DESIGN,2021,165.
APA	Cui, Kaixuan,Zhao, Yanyun,Liang, Mengtian,Huang, Bo,&Huang, Qunying.(2021).Investigation on low cycle fatigue properties of CLAM steel electron beam welded joint at 550 degrees C.FUSION ENGINEERING AND DESIGN,165.
MLA	Cui, Kaixuan,et al."Investigation on low cycle fatigue properties of CLAM steel electron beam welded joint at 550 degrees C".FUSION ENGINEERING AND DESIGN 165(2021).