Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging

doi:10.1016/j.matchar.2021.111309

IMR OpenIR

	Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging
	Xiao, Xiaopeng 1,2; Li, Dianzhong 1; Li, Yiyi 1,3; Lu, Shanping 1
通讯作者	Lu, Shanping(shplu@imr.ac.cn)
	2021-08-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	178 页码:11
摘要	Stress relaxation cracking failure is widely reported in the materials used for thermal power plants, which seriously affected the safety of thermal power units under long-term service. In our study, the influence of intergranular precipitation behavior on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal was investigated based on the pre-compressed CT technique. The 45 degrees misorientation grain boundary has the lowest critical interfacial nucleation energy, followed by the grain boundaries away from the 45 degrees misorientation. As a result, the coarse intergranular M23C6 carbides were more prone to precipitate at 45 degrees misorientation grain boundary, which led to the lowest resistance to stress relaxation cracking susceptibility at 35 to 45 degrees grain boundary. Further analysis indicated that intergranular cavities were easily initiated at the noncoherent M23C6/gamma interface. Since the non-coherent interface with a low Cr concentration zone and high specific interfacial energy had a lower strength, the lattice distortion at the non-coherent interface could lead to higher strain concentration.
关键词	Stress relaxation cracking Austenitic stainless steel weld metal Grain boundary misorientation Depletion of Cr
资助者	Shenyang National Laboratory for Materials Science Innovation
DOI	10.1016/j.matchar.2021.111309
收录类别	SCI
语种	英语
资助项目	Shenyang National Laboratory for Materials Science Innovation[L2019R35]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:000678042300002
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：10[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/321006/159736
专题	中国科学院金属研究所
通讯作者	Lu, Shanping
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Xiaopeng,Li, Dianzhong,Li, Yiyi,et al. Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging[J]. MATERIALS CHARACTERIZATION,2021,178:11.
APA	Xiao, Xiaopeng,Li, Dianzhong,Li, Yiyi,&Lu, Shanping.(2021).Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging.MATERIALS CHARACTERIZATION,178,11.
MLA	Xiao, Xiaopeng,et al."Intergranular precipitation behavior and its influence on the stress relaxation cracking susceptibility of Super304H austenitic stainless steel weld metal during long-term aging".MATERIALS CHARACTERIZATION 178(2021):11.