Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension

doi:10.1016/j.ijimpeng.2021.104008

IMECH-IR > 非线性力学国家重点实验室

	Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension
	Qiao Y(乔禹)1,2,3; Chen Y(陈艳)2,3 ; Cao FH(曹富华)2,3 ; Wang HY(汪海英)2,3; Dai LH(戴兰宏)1,2,3,4
通讯作者	Chen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
发表期刊	INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
	2021-12-01
卷号	158 页码:12
ISSN	0734-743X
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.
关键词	High-entropy alloy Split Hopkinson tensile bar Strain rate effect Dislocation Twin
DOI	10.1016/j.ijimpeng.2021.104008
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000706516300004
关键词[WOS]	STRAIN-RATE SENSITIVITY ; HIGH-STRENGTH CONCRETE ; DISLOCATION DENSITY ; DEFORMATION-BEHAVIOR ; EVOLUTION ; STRESS ; ENERGY ; MICROSTRUCTURE ; TEMPERATURES ; DIFFRACTION
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
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]
项目资助者	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
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Chen, Yan ; Dai, Lan-Hong
引用统计	被引频次：38[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/311007/87628
专题	非线性力学国家重点实验室
作者单位	1.Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 4.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Qiao Y,Chen Y,Cao FH,et al. Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2021,158:12.
APA	乔禹,陈艳,曹富华,汪海英,&戴兰宏.(2021).Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,158,12.
MLA	乔禹,et al."Dynamic behavior of CrMnFeCoNi high-entropy alloy in impact tension".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 158(2021):12.

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