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

doi:10.1016/j.jmrt.2023.12.193

IMECH-IR > 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)
通讯作者	Chen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lanhong(lhdai@lnm.imech.ac.cn)
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
	2024
卷号	28 页码:3583-3596
ISSN	2238-7854
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.
关键词	Medium-entropy alloy Phase transition Shock compression Ramp-wave Loading path
DOI	10.1016/j.jmrt.2023.12.193
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001153889000001
关键词[WOS]	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
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
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]
项目资助者	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)
论文分区	一类
力学所作者排名	1
RpAuthor	Chen, Yan ; Dai, Lanhong
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/94388
专题	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.