Effects of stabilized heat treatment on stress rupture properties of high Si-bearing austenitic stainless steel weld metal

doi:10.1016/j.ijpvp.2024.105300

IMR OpenIR

	Effects of stabilized heat treatment on stress rupture properties of high Si-bearing austenitic stainless steel weld metal
	Chen, Yakui 1,2; Wu, Dong 1,3; Lu, Shanping 1
通讯作者	Wu, Dong(wudong@imr.ac.cn) ; Lu, Shanping(shplu@imr.ac.cn)
	2024-10-01
发表期刊	INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
ISSN	0308-0161
卷号	211 页码:10
摘要	The 15Cr-9Ni-Nb austenitic stainless steel weld metal with a Si content of 3.5 wt% was prepared via gas tungsten arc welding and then held at 900 degrees C for 3 h for the stabilized heat treatment (SHT). The stress rupture properties of the as-welded (AW) and SHT weld metals at 550 degrees C were evaluated via the Larson-Miller parameter. The microstructure evolution was discussed during the 550 degrees C stress rupture process. The coarse a-phase and relatively fine G-phase formed on the S-ferrite during aging at 550 degrees C. In the AW weld metal, the continuous S-ferrite with a large amount of coarse a-phase led to the formation and expansion of cracks during the stress rupture process, which accelerated the eventual rupture and damaged the stress rupture properties. The SHT decreased the S-ferrite content and formed a large amount of nanoscale NbC precipitated in the matrix. The decreased S-ferrite content avoided the rapid formation and expansion of cracks and the nanoscale NbC blocked the dislocation movement during the stress rupture process, which improved the stress rupture properties.
关键词	Austenitic stainless steel weld metal delta-ferrite Stabilized heat treatment Stress rupture properties
资助者	National Key Research and Development Program of China ; Innovation Project of Shenyang National Laboratory for Materials Science (SYNL-2022) ; China Institute of Atomic Energy
DOI	10.1016/j.ijpvp.2024.105300
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2018YFA0702902] ; Innovation Project of Shenyang National Laboratory for Materials Science (SYNL-2022) ; China Institute of Atomic Energy[E141L803J1]
WOS研究方向	Engineering
WOS类目	Engineering, Multidisciplinary ; Engineering, Mechanical
WOS记录号	WOS:001312886400001
出版者	ELSEVIER SCI LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189910
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,Wu, Dong,Lu, Shanping. Effects of stabilized heat treatment on stress rupture properties of high Si-bearing austenitic stainless steel weld metal[J]. INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING,2024,211:10.
APA	Chen, Yakui,Wu, Dong,&Lu, Shanping.(2024).Effects of stabilized heat treatment on stress rupture properties of high Si-bearing austenitic stainless steel weld metal.INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING,211,10.
MLA	Chen, Yakui,et al."Effects of stabilized heat treatment on stress rupture properties of high Si-bearing austenitic stainless steel weld metal".INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING 211(2024):10.