| Mechanical responses and crystal plasticity model of CoCrNi medium-entropy alloy under ramp wave compression | |
| Dong JL(董金磊); Zhang, Xuping; Wang, Guiji; Wu XQ(吴先前); Luo, Binqiang; Chen, Xuemiao; Tan, Fuli; Zhao, Jianheng; Sun, Chengwei | |
| Corresponding Author | Zhang, Xuping() ; Wang, Guiji() |
| Source Publication | MATTER AND RADIATION AT EXTREMES
 |
| 2024-09-01 | |
| Volume | 9Issue:5Pages:16 |
| ISSN | 2468-2047 |
| Abstract | 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. |
| DOI | 10.1063/5.0206773 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001253493400001 |
| WOS Keyword | SHORT-RANGE ORDER ; HIGH-STRAIN ; HIGH-PRESSURE ; CONSTITUTIVE MODEL ; SHOCK COMPRESSION ; SHEAR BANDS ; DEFORMATION ; METALS ; TRANSITION ; EVOLUTION |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| Funding Project | National Natural Science Foundation of China[92166201] ; National Natural Science Foundation of China[12002327] ; National Natural Science Foundation of China[12272391] |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 二类/Q1 |
| Ranking | 3+ |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/95848 |
| Collection | 流固耦合系统力学重点实验室 |
| Recommended Citation GB/T 7714 | Dong JL,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 | 董金磊.,Zhang, Xuping.,Wang, Guiji.,吴先前.,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 | 董金磊,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. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment