Atomic simulation study on the effect of Y atom and grain boundary on tensile deformation in polycrystalline magnesium alloy

被引：14

作者：

Mei, Wanwan ^{[1
]}

Li, Quanan ^{[1
,2
,3
]}

Chen, Xiaoya ^{[1
,2
]}

机构：

[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China

[2] Prov & Ministerial Coconstruct Collaborat Innovat, Luoyang 471023, Peoples R China

[3] Longmen Lab, Luoyang 471000, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 23卷

基金：

中国国家自然科学基金;

关键词：

Polycrystalline magnesium alloy; Mg-Y; Grain boundary; Crack form; Twin nucleate; C PLUS; MG-Y; SLIP; DISLOCATIONS; TWIN; ZN; DUCTILITY; AL; SEGREGATION; STRESS;

D O I：

10.1016/j.jmrt.2023.01.059

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The deformation of polycrystalline magnesium alloy was studied by molecular dynamics simulation. The influencing factors of tensile properties and its deformation mechanism were discussed. It was found that Y atom could inhibit the activation of basal < a > slip and promote the activation of pyramidal < c + a > slip. The crack was formed at the grain boundary with large orientation differences and propagated along the grain boundary. The stress concentration mainly occurred at grain boundaries, and its concentration decreases with the grain size decreasing. The formation of deformation twin was inhibited by small grains. The twin tended to nucleate at grain boundary and grew by absorbing dislocations. It was also found that new twin was preferentially formed near the old twin. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：931 / 942

页数：12

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