Softening mechanism and failure behavior of 9Cr oxide dispersion strengthened steel resistance spot welded joint

doi:10.1016/j.jmapro.2024.03.062

IMR OpenIR

	Softening mechanism and failure behavior of 9Cr oxide dispersion strengthened steel resistance spot welded joint
	Jia, Xin 1,2,3; Wei, Shitong 1,3; Lu, Shanping 3
通讯作者	Wei, Shitong(stwei@imr.ac.cn) ; Lu, Shanping(shplu@imr.ac.cn)
	2024-05-30
发表期刊	JOURNAL OF MANUFACTURING PROCESSES
ISSN	1526-6125
卷号	118 页码:331-340
摘要	Oxide dispersion strengthened (ODS) steel is one of the most promising materials for nuclear applications. However, there are fewer studies on the spot welding of ODS steel, and the softening mechanism of ODS steel resistance spot welded joint is unclear. The microstructural features of the ODS resistance spot welded joint was characterized to analyze the softening mechanism. The failure behavior and tensile shear performance were studied combined with finite element simulation. The results showed that the fusion boundary has the lowest hardness and the softening zone is divided into fusion zone(FZ) softening and heat affected zone(HAZ) softening according to different location in the joint. In FZ softening, the softening is mainly caused by the presence of delta-ferrite and fewer oxides as well as lower dislocation density. In HAZ softening, the softening is mainly caused by larger grains, less oxides. There are two types of failure, the fracture initiated at HAZ softening shows a brittle feature, while initiated at FZ softening shows a ductile feature. The softening leads to a reduction in tensile-shear strength. Thus, the control of softening zone is critical to improve the reliability of welded joints.
关键词	Oxide dispersion strengthened steel Resistance spot welding Softening Reliability of welded joints
资助者	China National Nuclear Corporation
DOI	10.1016/j.jmapro.2024.03.062
收录类别	SCI
语种	英语
资助项目	China National Nuclear Corporation
WOS研究方向	Engineering
WOS类目	Engineering, Manufacturing
WOS记录号	WOS:001221343500001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：2[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/321006/186074
专题	中国科学院金属研究所
通讯作者	Wei, Shitong; Lu, Shanping
作者单位	1.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jia, Xin,Wei, Shitong,Lu, Shanping. Softening mechanism and failure behavior of 9Cr oxide dispersion strengthened steel resistance spot welded joint[J]. JOURNAL OF MANUFACTURING PROCESSES,2024,118:331-340.
APA	Jia, Xin,Wei, Shitong,&Lu, Shanping.(2024).Softening mechanism and failure behavior of 9Cr oxide dispersion strengthened steel resistance spot welded joint.JOURNAL OF MANUFACTURING PROCESSES,118,331-340.
MLA	Jia, Xin,et al."Softening mechanism and failure behavior of 9Cr oxide dispersion strengthened steel resistance spot welded joint".JOURNAL OF MANUFACTURING PROCESSES 118(2024):331-340.