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Polymorphic phase transition in CoCrNi medium-entropy alloy under impact loadings

文献类型：期刊论文

作者Zhou, Wenbo1,3; Cao, Fuhua1,3; Yang, Zengyu1,3; Li, Tong1,3; Niu, Yangyang1,3; Chen, Yan1,3; Wang, Haiying1,3; Dai, Lanhong1,2,3; Dai LH(戴兰宏); Wang HY(汪海英)
刊名JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
出版日期2024
卷号28页码:3583-3596
ISSN号2238-7854
关键词Medium-entropy alloy Phase transition Shock compression Ramp-wave Loading path
DOI10.1016/j.jmrt.2023.12.193
通讯作者Chen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lanhong(lhdai@lnm.imech.ac.cn)
英文摘要Polymorphic phase transition in metallic materials under high pressure is a critical aspect of dynamic properties and has been attracting a great interest. Despite the extensive researches have been made on understanding of this phase transition in traditional single -principal element alloys, little is known about the phase transition in recently emergent multi-principal medium and high entropy alloys, especially compressed under high strain rates. In this work, based on molecular dynamic simulations, three impact loading strategies with distinct loading paths, such as single-shock, double-shock and ramp-wave loading are carried out on the single crystalline CoCrNi medium-entropy alloy (MEA) to investigate the phase transition under high strain-rate compression. Careful characterizations show that the phase transition of CoCrNi MEA is loading-path dependent, as evidenced by the significant differences in macroscopic pressure evolution and microscopic structural phase transition among the samples under various thermodynamic paths. An intriguing pressure "overshoot" is found and demonstrated as the characteristic of the critical structural phase transition from face-centered cubic (FCC) structure to hexagonal-close-packed (HCP) structure mediated by body-centered cubic (BCC) like clusters. We show that such loading-path dependence is attributed to the strain rate and temperature rise in the loading process, which control the evolution of microstructure and deformation field. The inherent correlation between the atomistic process of phase transition and loading strategies results in polymorphic phase transition under high strain rates. These findings shed new light on the nature of impact phase transition of multi-principal alloys.
WOS关键词MOLECULAR-DYNAMICS SIMULATIONS ; SHORT-RANGE ORDER ; MECHANICAL-PROPERTIES ; SHOCK COMPRESSION ; DEFORMATION ; PLASTICITY ; STRAIN ; MICROSTRUCTURE ; TRANSFORMATION ; RESISTANCE
资助项目NSFC Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics[11988102] ; Ye Qisun Science Foundation of National Natural Science Foundation of China[U2141204] ; NSFC[11972346] ; NSFC[12172367] ; Key Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China[KFJJ23-03 M] ; Opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology)[ZDRW-CN-2021-2-3] ; [2022YFC3320504-02]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001153889000001
资助机构NSFC Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics ; Ye Qisun Science Foundation of National Natural Science Foundation of China ; NSFC ; Key Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China ; Opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology)
源URL[http://dspace.imech.ac.cn/handle/311007/94387]  
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, Lanhong
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
2.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Wenbo,Cao, Fuhua,Yang, Zengyu,et al. Polymorphic phase transition in CoCrNi medium-entropy alloy under impact loadings[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,28:3583-3596.
APA Zhou, Wenbo.,Cao, Fuhua.,Yang, Zengyu.,Li, Tong.,Niu, Yangyang.,...&牛洋洋.(2024).Polymorphic phase transition in CoCrNi medium-entropy alloy under impact loadings.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,28,3583-3596.
MLA Zhou, Wenbo,et al."Polymorphic phase transition in CoCrNi medium-entropy alloy under impact loadings".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 28(2024):3583-3596.

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来源：力学研究所

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