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

文献类型：期刊论文

作者Zhu, Xiuju2,3; Cao, Fuhua1; Dai, Lanhong2,3; Chen, Yan2,3; Dai LH(戴兰宏); Chen Y(陈艳); Cao FH(曹富华); Zhu XJ(朱秀举)
刊名METALS
出版日期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
DOI10.3390/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.
WOS关键词STRENGTH-DUCTILITY MATCH ; MOLECULAR-DYNAMICS ; MECHANICAL-PROPERTIES ; GRAIN-BOUNDARY ; DEFORMATION ; FRACTURE ; INHOMOGENEITY ; PLASTICITY
资助项目National Key Research and Development Program of China
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
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.,戴兰宏.,...&朱秀举.(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.

入库方式： OAI收割

来源：力学研究所

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