Mechanical responses and crystal plasticity model of CoCrNi medium-entropy alloy under ramp wave compression

doi:10.1063/5.0206773

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Mechanical responses and crystal plasticity model of CoCrNi medium-entropy alloy under ramp wave compression
	Dong, Jinlei 3; Zhang, Xuping 3; Wang, Guiji 3; Wu, Xianqian 2; Luo, Binqiang 3; Chen, Xuemiao 3; Tan, Fuli 3; Zhao, Jianheng 1; Sun, Chengwei 3
刊名	MATTER AND RADIATION AT EXTREMES
	2024-09-01
卷号	9 期号:5 页码:16
ISSN号	2468-2047
DOI	10.1063/5.0206773
通讯作者	Zhang, Xuping() ; Wang, Guiji()
英文摘要	It is of substantial scientific significance and practical value to reveal and understand the multiscale mechanical properties and intrinsic mechanisms of medium-entropy alloys (MEAs) under high strain rates and pressures. In this study, the mechanical responses and deformation mechanisms of an equiatomic CoCrNi MEA are investigated utilizing magnetically driven ramp wave compression (RWC) with a strain rate of 10(5) s(-1). The CoCrNi MEA demonstrates excellent dynamic mechanical responses and yield strength under RWC compared with other advanced materials. Multiscale characterizations reveal that grain refinement and abundant micromechanisms, including dislocation slip, stacking faults, nanotwin network, and Lomer-Cottrell locks, collectively contribute to its excellent performance during RWC. Furthermore, dense deformation twins and shear bands intersect, forming a weave-like microstructure that can disperse deformation and enhance plasticity. On the basis of these observations, we develop a modified crystal plasticity model with coupled dislocation and twinning mechanisms, providing a relatively accurate quantitative description of the multiscale behavior under RWC. The results of simulations indicate that the activation of multilevel microstructures in CoCrNi MEA is primarily attributable to stress inhomogeneities and localized strain during RWC. Our research offers valuable insights into the dynamic mechanical responses of CoCrNi MEA, positioning it as a promising material for use under extreme dynamic conditions.
资助项目	National Natural Science Foundation of China[92166201] ; National Natural Science Foundation of China[12002327] ; National Natural Science Foundation of China[12272391]
WOS关键词	SHORT-RANGE ORDER ; HIGH-STRAIN ; HIGH-PRESSURE ; CONSTITUTIVE MODEL ; SHOCK COMPRESSION ; SHEAR BANDS ; DEFORMATION ; METALS ; TRANSITION ; EVOLUTION
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:001253493400001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/95847]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Zhang, Xuping; Wang, Guiji
作者单位	1.China Acad Engn Phys, Inst Appl Elect, Mianyang 621999, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 3.China Acad Engn Phys, Inst Fluid Phys, Mianyang 621999, Peoples R China
推荐引用方式 GB/T 7714	Dong, Jinlei,Zhang, Xuping,Wang, Guiji,et al. Mechanical responses and crystal plasticity model of CoCrNi medium-entropy alloy under ramp wave compression[J]. MATTER AND RADIATION AT EXTREMES,2024,9(5):16.
APA	Dong, Jinlei.,Zhang, Xuping.,Wang, Guiji.,Wu, Xianqian.,Luo, Binqiang.,...&Sun, Chengwei.(2024).Mechanical responses and crystal plasticity model of CoCrNi medium-entropy alloy under ramp wave compression.MATTER AND RADIATION AT EXTREMES,9(5),16.
MLA	Dong, Jinlei,et al."Mechanical responses and crystal plasticity model of CoCrNi medium-entropy alloy under ramp wave compression".MATTER AND RADIATION AT EXTREMES 9.5(2024):16.