Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension

doi:10.1016/j.ijimpeng.2021.104008

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension
	Qiao, Yu 2,3,4; Chen, Yan 2,3; Cao, Fu-Hua 2,3; Wang, Hai-Ying 2,3; Dai, Lan-Hong 1,2,3,4
刊名	INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
	2021-12-01
卷号	158 页码:12
关键词	High-entropy alloy Split Hopkinson tensile bar Strain rate effect Dislocation Twin
ISSN号	0734-743X
DOI	10.1016/j.ijimpeng.2021.104008
通讯作者	Chen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
英文摘要	High-entropy alloys (HEAs), recently emerging alloy materials with numerous excellent performances, may have a wide application prospect in impact engineering. However, previous research regarding the mechanical behavior of HEAs has primarily focused on quasi-static testing, whereas the dynamic mechanical behavior of HEAs at high strain rates remains elusive. In this paper, the unusual simultaneous strength-plasticity enhancement and the inhibition of the high strain rate embrittlement of CrMnFeCoNi HEA in impact tension were revealed via split Hopkinson tensile bar (SHTB) with high-speed photography. Quantitative microstructural analysis indicates that the cooperation of twins and dislocations is the crucial mechanism for the synchronous enhancement of strength-plasticity in this alloy under impact tension. A thermo-viscoplastic constitutive model based on dislocations and twins evolution was developed to describe dynamic mechanical behavior. The high plastic hardening under dynamic tension was revealed to be induced by high dislocation forest hardening and strong resistance of twins to dislocation motion. The excellent combination of dynamic strength-plasticity of CrMnFeCoNi HEA makes it becoming a promising candidate for impact engineering applications.
资助项目	National Key Research and Development Program of China[2017YFB0702003] ; NSFC[11790292] ; NSFC[11972346] ; NSFC[11672316] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040302] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040303] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDJSSW-JSC011] ; Science Challenge Project[TZ2018001] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102]
WOS关键词	STRAIN-RATE SENSITIVITY ; HIGH-STRENGTH CONCRETE ; DISLOCATION DENSITY ; DEFORMATION-BEHAVIOR ; EVOLUTION ; STRESS ; ENERGY ; MICROSTRUCTURE ; TEMPERATURES ; DIFFRACTION
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000706516300004
资助机构	National Key Research and Development Program of China ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Science Challenge Project ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87627]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Chen, Yan; Dai, Lan-Hong
作者单位	1.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 4.Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China
推荐引用方式 GB/T 7714	Qiao, Yu,Chen, Yan,Cao, Fu-Hua,et al. Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2021,158:12.
APA	Qiao, Yu,Chen, Yan,Cao, Fu-Hua,Wang, Hai-Ying,&Dai, Lan-Hong.(2021).Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,158,12.
MLA	Qiao, Yu,et al."Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 158(2021):12.