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

doi:10.3390/met14020226

IMECH-IR > 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 XJ(朱秀举)1,2 ; Cao FH(曹富华)3 ; Dai LH(戴兰宏)1,2 ; Chen Y(陈艳)1,2
通讯作者	Cao, Fuhua([email protected]) ; Chen, Yan([email protected])
发表期刊	METALS
	2024-02-01
卷号	14 期号:2 页码:14
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.
关键词	chemical short-range order lattice distortion J-integral localized deformation zone crack molecular dynamics
DOI	10.3390/met14020226
收录类别	SCI
语种	英语
WOS记录号	WOS:001172188100001
关键词[WOS]	STRENGTH-DUCTILITY MATCH ; MOLECULAR-DYNAMICS ; MECHANICAL-PROPERTIES ; GRAIN-BOUNDARY ; DEFORMATION ; FRACTURE ; INHOMOGENEITY ; PLASTICITY
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助项目	National Key Research and Development Program of China
项目资助者	National Key Research and Development Program of China
论文分区	二类
力学所作者排名	1
RpAuthor	Cao, Fuhua ; Chen, Yan
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/94568
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 3.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
推荐引用方式 GB/T 7714	Zhu XJ,Cao FH,Dai LH,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.Rp_Au:Cao, Fuhua, Chen, Yan
APA	朱秀举,曹富华,戴兰宏,&陈艳.(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	朱秀举,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.