Effects of Si on the stress rupture life and microstructure of a novel austenitic stainless steel

doi:10.1016/j.jmrt.2023.06.131

IMR OpenIR

	Effects of Si on the stress rupture life and microstructure of a novel austenitic stainless steel
	Lu, Chengxu 1,2,3; Yi, Haoyu 4; Chen, Minli 4; Xu, Yang 4; Wang, Min 1,3; Hao, Xianchao 1,3; Liang, Tian 1,3; Ma, Yingche 1,3
通讯作者	Wang, Min(minwang@imr.ac.cn) ; Ma, Yingche(ycma@imr.ac.cn)
	2023-07-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	25 页码:3408-3424
摘要	A novel Si-bearing austenitic stainless steel was designed as the cladding material for leadcooled fast reactors with an operating temperature range of 450 degrees C-550 degrees C, and the effects of Si (1.0 wt% - 2.0 wt%) on the creep life and fractured microstructure of material were studied at 550 degrees C and 650 degrees C. Results show that the addition of Si increased the stress rupture life of steel at 550 degrees C whereas brought in an opposite effect at 650 degrees C, which was closely related to the precipitation behavior of a phase at these two temperatures during creep. At 550 degrees C the precipitation of a phase was quite slow, but it was substantially accelerated at 650 degrees C. Since the experimental materials used in this work were in a cold worked state, so deformation twins existed and they were discovered to be able to promote the nucleation and growth of a phase on the grain boundaries. With the increase of Si content at 550 degrees C, a phase became larger in quantity and denser in distribution on the grain boundary, which improved the anti-cracking ability of grain boundary and enhanced the creep life of material. However, at 650 degrees C, a particles apparently coarsened and congregated on the grain boundary under thermal activation, leading to an evident drop in the stress rupture property of steel. (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	Austenitic stainless steel Si addition Deformation twin Sigma phase Stress rupture life
资助者	CAS Key Laboratory of Nuclear Ma- terials and Safety Assessment, Chinese Academy of Sciences
DOI	10.1016/j.jmrt.2023.06.131
收录类别	SCI
语种	英语
资助项目	CAS Key Laboratory of Nuclear Ma- terials and Safety Assessment, Chinese Academy of Sciences[2021NMSAKF02]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001089085000001
出版者	ELSEVIER
引用统计	被引频次：8[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/321006/177925
专题	中国科学院金属研究所
通讯作者	Wang, Min; Ma, Yingche
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.IMR NMSA, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 4.China Nucl Power Technol Res Inst, Shenzhen 518000, Peoples R China
推荐引用方式 GB/T 7714	Lu, Chengxu,Yi, Haoyu,Chen, Minli,et al. Effects of Si on the stress rupture life and microstructure of a novel austenitic stainless steel[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,25:3408-3424.
APA	Lu, Chengxu.,Yi, Haoyu.,Chen, Minli.,Xu, Yang.,Wang, Min.,...&Ma, Yingche.(2023).Effects of Si on the stress rupture life and microstructure of a novel austenitic stainless steel.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,25,3408-3424.
MLA	Lu, Chengxu,et al."Effects of Si on the stress rupture life and microstructure of a novel austenitic stainless steel".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 25(2023):3408-3424.