Effects of Chemical Short-Range Order and Lattice Distortion on Crack-Tip Behavior of Medium-Entropy Alloy by Atomistic Simulations

doi:10.3390/met14020226

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

	Effects of Chemical Short-Range Order and Lattice Distortion on Crack-Tip Behavior of Medium-Entropy Alloy by Atomistic Simulations
	Zhu, Xiuju 2,3; Cao, Fuhua 1; Dai, Lanhong 2,3; Chen, Yan 2,3
刊名	METALS
	2024-02-01
卷号	14 期号:2 页码:14
关键词	chemical short-range order lattice distortion J-integral localized deformation zone crack molecular dynamics
DOI	10.3390/met14020226
通讯作者	Cao, Fuhua(caofuhua@csu.edu.cn) ; Chen, Yan(chenyan@lnm.imech.ac.cn)
英文摘要	It is well demonstrated that the complex chemical fluctuations on high/medium-entropy alloys (H/MEAs) play critical roles in their deformation process, but there are few reports related to the effect of such complex chemical fluctuations on the crack behavior. In this paper, the effects of chemical short-range order (CSRO) and lattice distortion (LD) on the crack-tip behavior of CrCoNi MEAs under mode I loading at room temperature are investigated by carrying out molecular dynamics (MD) simulation, hybrid MD/Monte-Carlo (MC) simulation and the J-integral method. The results reveal that CSRO can improve the J-integral value without significant changes in the localized deformation zone size. On the contrary, LD can lower the J-integral value with an increase in the localized deformation zone size. The energetic analysis shows that CSRO improves the activation energy barrier of Shockley partial dislocation from the crack-tip while LD reduces the activation energy barrier. Our work is a step forward in understanding the effects of CSRO and LD on the crack-tip behavior and deformation mechanisms of CrCoNi MEAs.
资助项目	National Key Research and Development Program of China
WOS关键词	STRENGTH-DUCTILITY MATCH ; MOLECULAR-DYNAMICS ; MECHANICAL-PROPERTIES ; GRAIN-BOUNDARY ; DEFORMATION ; FRACTURE ; INHOMOGENEITY ; PLASTICITY
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:001172188100001
资助机构	National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94567]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Cao, Fuhua; Chen, Yan
作者单位	1.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, 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	Zhu, Xiuju,Cao, Fuhua,Dai, Lanhong,et al. Effects of Chemical Short-Range Order and Lattice Distortion on Crack-Tip Behavior of Medium-Entropy Alloy by Atomistic Simulations[J]. METALS,2024,14(2):14.
APA	Zhu, Xiuju,Cao, Fuhua,Dai, Lanhong,&Chen, Yan.(2024).Effects of Chemical Short-Range Order and Lattice Distortion on Crack-Tip Behavior of Medium-Entropy Alloy by Atomistic Simulations.METALS,14(2),14.
MLA	Zhu, Xiuju,et al."Effects of Chemical Short-Range Order and Lattice Distortion on Crack-Tip Behavior of Medium-Entropy Alloy by Atomistic Simulations".METALS 14.2(2024):14.