Role of Ni content on microstructural and mechanical responses of Nb-stabilized metastable austenitic stainless steel weld metals

doi:10.1016/j.jmrt.2023.09.182

IMR OpenIR

	Role of Ni content on microstructural and mechanical responses of Nb-stabilized metastable austenitic stainless steel weld metals
	Chen, Yakui 1,2; Wei, Shitong 1,3; Wu, Dong 1,3; Lu, Shanping 1
通讯作者	Wu, Dong(wudong@imr.ac.cn) ; Lu, Shanping(shplu@imr.ac.cn)
	2023-09-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	26 页码:8425-8439
摘要	Three Nb-stabilized metastable austenitic stainless steel (15Cr-9Ni-Nb steel) weld metals with Ni contents of 8.4 wt%, 9.2 wt%, and 10.2 wt% were designed and prepared by gas tungsten arc welding. The effects of Ni content on the solidification behavior, microstructure, and the mechanism of deformation-induced martensitic transformation in the tensile process were investigated via scanning electron microscopy, transmission electron microscopy, scanning transmission electron microscopy, and high-resolution transmission electron microscopy, and their effects on mechanical properties were also discussed. As the Ni content increased, the solidification mode of weld metals changed from ferrite-austenite mode to austeniteferrite mode, which made the segregation of Nb and Si at the interdendritic region more obvious and increased the total volume and the average size of primary NbC significantly. The large amount of coarse primary NbC in the AF weld metal damaged the impact toughness and reduction of area by inducing intergranular cracks and intergranular fractures. Moreover, both the three weld metals had poor mechanical stability and the deformation-induced martensitic transformation (DIMT) (g/a0) occurred during the tensile process, which contributed to increased tensile strength. As the Ni content increased, the mechanical stability of austenite increased, and the strengthing effect of DIMT decreased, while the uniform elongation of weld metals increased.(c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
关键词	Metastable austenitic stainless steel Weld metal Solidification mode Primary NbC Deformation-induced martensitic transformation
资助者	Innovation Project of Shenyang National Laboratory for Ma-terials Science ; China Institute of Atomic Energy
DOI	10.1016/j.jmrt.2023.09.182
收录类别	SCI
语种	英语
资助项目	Innovation Project of Shenyang National Laboratory for Ma-terials Science[SYNL-2022] ; China Institute of Atomic Energy[E141L803J1]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001088775900001
出版者	ELSEVIER
引用统计	被引频次：5[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/321006/177992
专题	中国科学院金属研究所
通讯作者	Wu, Dong; Lu, Shanping
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 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, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yakui,Wei, Shitong,Wu, Dong,et al. Role of Ni content on microstructural and mechanical responses of Nb-stabilized metastable austenitic stainless steel weld metals[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,26:8425-8439.
APA	Chen, Yakui,Wei, Shitong,Wu, Dong,&Lu, Shanping.(2023).Role of Ni content on microstructural and mechanical responses of Nb-stabilized metastable austenitic stainless steel weld metals.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,26,8425-8439.
MLA	Chen, Yakui,et al."Role of Ni content on microstructural and mechanical responses of Nb-stabilized metastable austenitic stainless steel weld metals".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 26(2023):8425-8439.