Microstructure and evolution of gradient dislocation cells in multi-principal element alloy subjected to cyclic torsion

doi:10.1016/j.actamat.2024.120059

IMR OpenIR

	Microstructure and evolution of gradient dislocation cells in multi-principal element alloy subjected to cyclic torsion
	Zhang, L. X.1,2; Liu, L.1,2; Guo, S.1,2; Pan, Q. S.1; Lu, L.1
通讯作者	Pan, Q. S.(qspan@imr.ac.cn) ; Lu, L.(llu@imr.ac.cn)
	2024-08-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	275 页码:13
摘要	Cyclic torsion induced dislocation patterns and evolution process of a single-phase Al0.1CoCrFeNi multi-principal element alloy at varying cumulative plastic strain, gamma(cu), from 0.1 to 14.6, were systematically investigated in this study. The results reveal that conventional single-slip individual dislocations dominate plastic deformation at initial straining stage. Whereas, at larger gamma(cu )up to 1.2, a large number of dislocation locks formed by mutual dislocation interactions in turn induce the extensive proliferation of multi-slip dislocations within the grain interiors. At gamma(cu) > 4, a large number of individual multiple dislocations are gradually organized into massive two dimensional micrometer-scale multi-slip dislocation wall segments; at gamma(cu) > 8, profuse three-dimensional finer equiaxed low-angle dislocation cells are formed. The distinctive structural characteristics of the sample-level hierarchical dislocation cell structure in metals with low stacking fault energies are mainly caused by the gradient distribution of small but large cumulative plastic strain, which are closely related to the enhanced multiple-slip dislocation activities.
关键词	Multi-principal element alloy Gradient dislocation cells Multi-slip Dislocation locks 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.2024.120059
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)[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:001251583200001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：6[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/321006/187163
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	Zhang, L. X.,Liu, L.,Guo, S.,et al. Microstructure and evolution of gradient dislocation cells in multi-principal element alloy subjected to cyclic torsion[J]. ACTA MATERIALIA,2024,275:13.
APA	Zhang, L. X.,Liu, L.,Guo, S.,Pan, Q. S.,&Lu, L..(2024).Microstructure and evolution of gradient dislocation cells in multi-principal element alloy subjected to cyclic torsion.ACTA MATERIALIA,275,13.
MLA	Zhang, L. X.,et al."Microstructure and evolution of gradient dislocation cells in multi-principal element alloy subjected to cyclic torsion".ACTA MATERIALIA 275(2024):13.