Microstructure evolution and mechanical properties of 16Cr-25Ni superaustenitic stainless steel weld metal during 600 degrees C aging

doi:10.1016/j.jmrt.2022.11.134

IMR OpenIR

	Microstructure evolution and mechanical properties of 16Cr-25Ni superaustenitic stainless steel weld metal during 600 degrees C aging
	Tian, Wenbin 1,2,3; Dong, Wenchao 3; Lu, Shanping 1
通讯作者	Lu, Shanping(shplu@imr.ac.cn)
	2023
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	22 页码:461-472
摘要	The effect of high temperature aging on the microstructure evolution and mechanical properties of 16Cr-25Ni superaustenitic stainless steel weld metal was investigated at 600 degrees C for up to 5000 h. Interdendritic micro-size M6C carbide, nano-size M6C and M23C6 carbides were identified in the 200 h aged weld metal, which appeared in clusters and distributed dispersedly. With the aging time increased to 1000 h, the interdendritic region was filled with newly formed precipitates, which were identified as nano-size M12C and M23C6 carbides. Compared with M6C carbide, M12C carbide was preferred to precipitate for lower Gibbs free energy, and the pre-existed M6C carbide had transformed to M12C carbide through the release of C atoms to the matrix. As the aging time further increased to 5000 h, the M12C carbide kept stable with the M23C6 carbide. Due to the precipitation and coarsen of M12C and M23C6 carbides that consumed massive solute atoms from matrix, which weakened the precipitation strengthening effect and suppressed the dynamic strain aging, the tensile properties kept superior stability during aging. The evolution of impact toughness was also closely related to the interdendritic precipitates. As the interdendritic region was occupied by precipitates since the aging time increased from 200 h to 1000 h, the impact toughness rapidly decreased from 76 J to 39 J, and then slightly decreased to 33 J with the aging time increased to 5000 h.(c) 2022 The Author(s). 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	Superaustenitic stainless steel Weld metal Carbide Mechanical properties Aging
资助者	Shenyang National Laboratory for Materials Science Innovation ; LingChuang Research Project of China National Nuclear Corporation
DOI	10.1016/j.jmrt.2022.11.134
收录类别	SCI
语种	英语
资助项目	Shenyang National Laboratory for Materials Science Innovation[SYNL-2021] ; LingChuang Research Project of China National Nuclear Corporation
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000900961100009
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/175452
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, 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	Tian, Wenbin,Dong, Wenchao,Lu, Shanping. Microstructure evolution and mechanical properties of 16Cr-25Ni superaustenitic stainless steel weld metal during 600 degrees C aging[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,22:461-472.
APA	Tian, Wenbin,Dong, Wenchao,&Lu, Shanping.(2023).Microstructure evolution and mechanical properties of 16Cr-25Ni superaustenitic stainless steel weld metal during 600 degrees C aging.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,22,461-472.
MLA	Tian, Wenbin,et al."Microstructure evolution and mechanical properties of 16Cr-25Ni superaustenitic stainless steel weld metal during 600 degrees C aging".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 22(2023):461-472.