Transformations of grain boundaries due to disclination motion and emission of dislocation pairs

被引：45

作者：

Gutkin, MY ^{[1
]}

Ovid'ko, IA ^{[1
]}

Skiba, NV ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Problems Mech Engn, St Petersburg 199178, Russia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 339卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

grain boundaries; dislocations; disclinations; polycrystalline materials; nanocrystalline materials;

D O I：

10.1016/S0921-5093(02)00107-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A theoretical model is suggested which describes changes of grain boundary misorientation parameters in plastically deformed polycrystalline and nanocrystalline materials. In the framework of the model, the changes occur via grain boundary disclination motion associated with emission of dislocation pairs from grain boundaries into adjacent grain interiors. Energetic characteristics of the disclination motion in question are calculated. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：73 / 80

页数：8

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