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
Corresponding AuthorChen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
Source PublicationINTERNATIONAL JOURNAL OF IMPACT ENGINEERING
2021-12-01
Volume158Pages:12
ISSN0734-743X
AbstractHigh-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.
KeywordHigh-entropy alloy Split Hopkinson tensile bar Strain rate effect Dislocation Twin
DOI10.1016/j.ijimpeng.2021.104008
Indexed BySCI ; EI
Language英语
WOS IDWOS:000706516300004
WOS KeywordSTRAIN-RATE SENSITIVITY ; HIGH-STRENGTH CONCRETE ; DISLOCATION DENSITY ; DEFORMATION-BEHAVIOR ; EVOLUTION ; STRESS ; ENERGY ; MICROSTRUCTURE ; TEMPERATURES ; DIFFRACTION
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
Funding ProjectNational 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]
Funding OrganizationNational 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
Classification二类/Q1
Ranking1
ContributorChen, Yan ; Dai, Lan-Hong
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/87628
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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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