Achieving superior superplasticity in CoCrFeNiCu high entropy alloy via friction stir processing with an improved convex tool

doi:10.1016/j.msea.2023.145034

IMR OpenIR

	Achieving superior superplasticity in CoCrFeNiCu high entropy alloy via friction stir processing with an improved convex tool
	Li, N.1,2; Wu, L. H.1,2,3; Li, Z. K.4; Fu, H. M.1; Zhu, Z. W.1; Xue, P.1,2,3; Liu, F. C.1; Ni, D. R.1,2; Xiao, B. L.1,2; Ma, Z. Y.1,2
通讯作者	Wu, L. H.(lhwu@imr.ac.cn) ; Xiao, B. L.()
	2023-05-17
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	873 页码:13
摘要	The investigation of the superplastic behavior of HEAs is significant since superplastic forming shows a great potential in fabricating complex components of HEAs. In this study, the superplastic behavior of the CoCrFeNiCu HEA fabricated by friction stir processing (FSP) was first time investigated at the temperature range of 900-950 & DEG;C and strain rate range of 3 x 10-4-3 x 10-2 s- 1. The ultrafine grained structure with 320 nm in grain size and 91% of high angle grain boundaries (HAGBs) was achieved by FSP with the improvement of stirring tool based on the characteristics of HEAs, which exhibited a good thermal stability when annealing at 900 & DEG;C. The FSP CoCrFeNiCu HEA exhibited a largest elongation of 620% and a low flow stress of 5 MPa at 950 & DEG;C and 3 x 10-3 s- 1. The flow stress in this study is the lowest in all the HEAs reported during superplastic deformation, which shows the great potential in the practical superplastic forming application. This is the first time to report the excellent superplasticity of dual-phase FCC HEAs. The superplastic deformation mechanism was mainly dominated by grain boundary sliding (GBS), accommodated by the diffusion of Cu-rich second phase. The failure mechanism was related to the aggregation of cavities. The excellent superplastic property was attributed to the stable equiaxed ultrafine microstructure, the high HAGB ratio, and soft Cu-riched second phase, which promoted the occurrence of GBS and its accommodation behavior. This study provides a way for fabricating superplastic HEAs and theoretical basis for superplastic forming of HEAs.
关键词	High entropy alloy Friction stir processing Superplasticity Ultrafine grains Grain boundary sliding
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Natural Science Foundation of Liaoning Province ; Liaoning Revitalization Talents Program
DOI	10.1016/j.msea.2023.145034
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52271043] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021193] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2021061] ; Natural Science Foundation of Liaoning Province[2021-MS-007] ; Natural Science Foundation of Liaoning Province[2021-YQ-01] ; Liaoning Revitalization Talents Program[XLYC2002099]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001026522500001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：9[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/321006/178535
专题	中国科学院金属研究所
通讯作者	Wu, L. H.; Xiao, B. L.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Peoples R China 4.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Li, N.,Wu, L. H.,Li, Z. K.,et al. Achieving superior superplasticity in CoCrFeNiCu high entropy alloy via friction stir processing with an improved convex tool[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,873:13.
APA	Li, N..,Wu, L. H..,Li, Z. K..,Fu, H. M..,Zhu, Z. W..,...&Ma, Z. Y..(2023).Achieving superior superplasticity in CoCrFeNiCu high entropy alloy via friction stir processing with an improved convex tool.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,873,13.
MLA	Li, N.,et al."Achieving superior superplasticity in CoCrFeNiCu high entropy alloy via friction stir processing with an improved convex tool".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 873(2023):13.