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

doi:10.1016/j.jmrt.2023.12.193

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Polymorphic phase transition in CoCrNi medium-entropy alloy under impact loadings
	Zhou WB(周文博); Cao FH(曹富华); Yang ZY(杨增宇); Li T(李统); Niu YY(牛洋洋); Chen Y(陈艳); Wang HY(汪海英); Dai LH(戴兰宏)
刊名	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
	2024
卷号	28 页码:3583-3596
关键词	Medium-entropy alloy Phase transition Shock compression Ramp-wave Loading path
ISSN号	2238-7854
DOI	10.1016/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.
分类号	一类
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关键词	MOLECULAR-DYNAMICS SIMULATIONS ; SHORT-RANGE ORDER ; MECHANICAL-PROPERTIES ; SHOCK COMPRESSION ; DEFORMATION ; PLASTICITY ; STRAIN ; MICROSTRUCTURE ; TRANSFORMATION ; RESISTANCE
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)
其他责任者	Chen, Yan ; Dai, Lanhong
内容类型	期刊论文
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
推荐引用方式 GB/T 7714	Zhou WB,Cao FH,Yang ZY,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	周文博.,曹富华.,杨增宇.,李统.,牛洋洋.,...&戴兰宏.(2024).Polymorphic phase transition in CoCrNi medium-entropy alloy under impact loadings.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,28,3583-3596.
MLA	周文博,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.