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

doi:10.1016/j.jmst.2022.06.028

CORC > 金属研究所 > 中国科学院金属研究所

	Stabilizing nanograined Fe-Cr alloy by Si-assisted grain boundary segregation
	Xu, X. F.1,2; Li, X. Y.2; Zhang, B.2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2023-01-20
卷号	134 页码:223-233
关键词	Segregation Grain boundary Fe -Cr -Si alloy Nanocrystalline Thermal stability
ISSN号	1005-0302
DOI	10.1016/j.jmst.2022.06.028
通讯作者	Li, X. Y.(xyli@imr.ac.cn)
英文摘要	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.
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
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000841304700002
资助机构	Ministry of Science and Technology of the People's Republic of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174560]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, X. Y.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, 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.