Stabilizing nanograined Fe-Cr alloy by Si-assisted grain boundary segregation

doi:10.1016/j.jmst.2022.06.028

IMR OpenIR

	Stabilizing nanograined Fe-Cr alloy by Si-assisted grain boundary segregation
	Xu, X. F.1,2; Li, X. Y.1; Zhang, B.1
通讯作者	Li, X. Y.(xyli@imr.ac.cn)
	2023-01-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	134 页码:223-233
摘要	Intentional solute segregation at grain boundary (GB) can effectively stabilize the nanograined alloys by reducing the excess energy and mobility of GB, but it usually works for binary alloys with sufficient GB segregation tendency. Here, we found that the segregation of Cr can be enhanced in a nanostruc-tured Fe-8Cr alloy with insufficient GB segregation tendency through the interaction of another solute Si (1.0 wt.%). After surface mechanical grinding treatment and subsequent annealing, the nanograined Fe-8Cr-1Si is more thermally stable than the nanograined Fe-8Cr, which is mainly attributed to the Si -enhanced Cr segregation as observed by Super-X energy-dispersive X-ray spectroscopy (EDS) mapping system. With the grain refinement to nanoscale, the thermal stability is further improved due to the in-crease of Cr content at GBs and the precipitates formed at appropriate high temperatures. The present finding provides guidance for the development of advanced nanostructured ternary alloys. ?? 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Segregation Grain boundary Fe -Cr -Si alloy Nanocrystalline Thermal stability
资助者	Ministry of Science and Technology of the People's Republic of China
DOI	10.1016/j.jmst.2022.06.028
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Technology of the People's Republic of China[2017YFA0204401] ; Ministry of Science and Technology of the People's Republic of China[2017YFA0700700]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000841304700002
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：3[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/321006/174561
专题	中国科学院金属研究所
通讯作者	Li, X. Y.
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, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Xu, X. F.,Li, X. Y.,Zhang, B.. Stabilizing nanograined Fe-Cr alloy by Si-assisted grain boundary segregation[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,134:223-233.
APA	Xu, X. F.,Li, X. Y.,&Zhang, B..(2023).Stabilizing nanograined Fe-Cr alloy by Si-assisted grain boundary segregation.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,134,223-233.
MLA	Xu, X. F.,et al."Stabilizing nanograined Fe-Cr alloy by Si-assisted grain boundary segregation".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 134(2023):223-233.