Superior dynamic shear properties and deformation mechanisms in a high entropy alloy with dual heterogeneous structures

doi:10.1016/j.jmrt.2022.06.074

IMECH-IR > 非线性力学国家重点实验室

	Superior dynamic shear properties and deformation mechanisms in a high entropy alloy with dual heterogeneous structures
	Tan S(覃双)1 ; Yang MX(杨沐鑫)1 ; Liu YK(刘琰珂)1,2 ; Jiang P(姜萍)1 ; Fan JT 3; Yuan FP(袁福平)1,2 ; Wu XL(武晓雷)1,2
通讯作者	Yuan, Fuping(fpyuan@lnm.imech.ac.cn)
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
	2022-07-01
卷号	19 页码:3287-3301
ISSN	2238-7854
摘要	Both heterogeneous grain structure and dual nanoprecipitates were designed in a Al-0.5 Cr0.9FeNi2.5V0.2 high entropy alloy (HEA), and the dynamic shear responses were investi-gated by hat-shaped specimens in split Hopkinson pressure bar tests. The present HEA with heterogeneous structure displays an unprecedented synergy of dynamic shear strength and ductility, as compared to the literature data for other metals and alloys. The excellent dynamic shear properties in the unaged samples could be due to the dynamical grain refinement, the dislocations hardening, and the precipitation hardening. The aged samples with a higher volume fraction of coherent L1(2) nanoprecipitates display even better dynamic shear properties, as compared to the unaged samples, which can be attributed to the triggered planar dislocation slip, the stored higher density of dislocations, the formation of dislocation substructure and the more pronounced precipitation hardening for postponing the occurrence of the adiabatic shear band (ASB). The high strain rate, high strain/stress magnitude, high adiabatic temperature rise, and fast-cooling process within ASB were observed to induce the dynamic recrystallization and the phase transformation from FCC phase to B2 phase, and this newly observed phase transformation phenomenon was not observed before under quasi-static deformation conditions. (C) 2022 The Author(s). Published by Elsevier B.V.
关键词	High-entropy alloys Heterogeneous structures Precipitates Strain hardening Adiabatic shear band Dynamic properties
DOI	10.1016/j.jmrt.2022.06.074
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000830291700002
关键词[WOS]	GRADIENT ; STRAIN ; MICROSTRUCTURE ; EVOLUTION ; BANDS ; LOCALIZATION ; PLASTICITY ; STRENGTH ; BEHAVIOR ; METALS
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助项目	National Key R&D Program of China[2017YFA0204402] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Natural Science Foundation of China[11790293] ; China Postdoctoral Science Foundation[2021M703292]
项目资助者	National Key R&D Program of China ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation
论文分区	一类
力学所作者排名	1
RpAuthor	Yuan, Fuping
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/89795
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China; 3.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Tan S,Yang MX,Liu YK,et al. Superior dynamic shear properties and deformation mechanisms in a high entropy alloy with dual heterogeneous structures[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2022,19:3287-3301.
APA	覃双.,杨沐鑫.,刘琰珂.,姜萍.,Fan JT.,...&武晓雷.(2022).Superior dynamic shear properties and deformation mechanisms in a high entropy alloy with dual heterogeneous structures.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,19,3287-3301.
MLA	覃双,et al."Superior dynamic shear properties and deformation mechanisms in a high entropy alloy with dual heterogeneous structures".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 19(2022):3287-3301.

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