Microstructure evolution in multi-principal element alloy with millimeter-sized grains subjected to cyclic torsion

doi:10.1016/j.actamat.2025.120766

IMR OpenIR

	Microstructure evolution in multi-principal element alloy with millimeter-sized grains subjected to cyclic torsion
	Liu, L.1,2; Liu, Y.1,2; Pan, Q. S.1,2; Liu, L. Y.1,2; Lu, L.1,2
通讯作者	Pan, Q. S.(qspan@imr.ac.cn) ; Lu, L.(llu@imr.ac.cn)
	2025-04-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	287 页码:11
摘要	In the previous report [Acta Materialia 275 (2024) 120,059], the dislocation patterns and evolution process of fine-grained Al0.1CoCrFeNi multi-principal element alloy with an average grain size of 46 mu m were investigated at varying cumulative plastic strains, gamma cu, by double-beam TEM observations. To further understand larger grain size effect, the mechanism of intrinsic dislocation activities in the same alloy with millimeter-sized grains at the same loading conditions was studied in this paper. Different from the extensive proliferation of multi-slip dislocation activities and the resultant randomly distributed Lomer-Cottrell (L-C) locks and cells in the finegrained alloy, multiple dislocation slip containing less slip-systems and parallel ordered L-C locks are preferentially activated, consequently promoting the generation of profuse geometrically necessary boundaries (GNBs) in the interior of millimeter-sized grains. With further increasing gamma cu, the GNBs progressively increases in the density and decrease in spacing, which also accelerates the formation of ultrafine-scale dislocation cell pattern.
关键词	Multi-principal element alloy Microstructure evolution Grain size effects Cyclic torsion Double-beam TEM
资助者	National Science Foundation of China (NSFC) ; International partnership program of the Chinese Academy of Sciences ; Excellent Youth Innovation Promotion Association, Chinese Academy of Sciences
DOI	10.1016/j.actamat.2025.120766
收录类别	SCI
语种	英语
资助项目	National Science Foundation of China (NSFC)[51931010] ; National Science Foundation of China (NSFC)[92163202] ; National Science Foundation of China (NSFC)[52122104] ; National Science Foundation of China (NSFC)[52471151] ; National Science Foundation of China (NSFC)[52071321] ; International partnership program of the Chinese Academy of Sciences[172GJHZ2023075GC] ; Excellent Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001418138600001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179917
专题	中国科学院金属研究所
通讯作者	Pan, Q. S.; Lu, L.
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
推荐引用方式 GB/T 7714	Liu, L.,Liu, Y.,Pan, Q. S.,et al. Microstructure evolution in multi-principal element alloy with millimeter-sized grains subjected to cyclic torsion[J]. ACTA MATERIALIA,2025,287:11.
APA	Liu, L.,Liu, Y.,Pan, Q. S.,Liu, L. Y.,&Lu, L..(2025).Microstructure evolution in multi-principal element alloy with millimeter-sized grains subjected to cyclic torsion.ACTA MATERIALIA,287,11.
MLA	Liu, L.,et al."Microstructure evolution in multi-principal element alloy with millimeter-sized grains subjected to cyclic torsion".ACTA MATERIALIA 287(2025):11.