Effects of Zn atoms on the basal dislocation in magnesium solution from Peierls-Nabarro model

被引：10

作者：

Fan, Tou-Wen ^{[1
]}

Luo, Li-Guo ^{[1
]}

Ma, Li ^{[2
]}

Tang, Bi-Yu ^{[1
,2
]}

Peng, Li-Ming ^{[3
]}

Ding, Wen-Jiang ^{[3
]}

机构：

[1] Xiangtan Univ, Dept Phys, Xiangtan 411105, Hunan, Peoples R China

[2] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

[3] Shanghai Jiao Tong Univ, Light Alloy Net Forming Natl Engn Res Ctr, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 582卷

关键词：

Magnesium; Peierls-Nabarro model; Dislocation; Peierls stress; BRILLOUIN-ZONE INTEGRATIONS; SOLID-SOLUTION; CORE STRUCTURE; 1ST-PRINCIPLES CALCULATIONS; STACKING-FAULTS; ALLOY AZ31; CROSS-SLIP; MG; DEFORMATION; TEXTURE;

D O I：

10.1016/j.msea.2013.06.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Effects of Zn atoms on basal dislocation in Mg solution have been studied by means of the improved 2D Peierls-Nabarro model in combination with misfit approximation under the Fermi-Dirac distribution function of solute atoms. With increasing Zn concentration, the separation distance for edge dislocation is decreased, while the separation distance is increased for screw dislocation. From function of the total dislocation line energy surfaces as shift displacement of dislocation center and separation distance between the partials, it is found that with the increase of solute concentration of Zn atoms, the Peierls energies, Peierls stresses and yield stresses for edge dislocation increase more quickly than ones for screw dislocation, and the increase of edge dislocation is stronger. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：299 / 304

页数：6

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