Formation of {1 1 (2)over-bar 1} twins in polycrystalline cobalt during dynamic plastic deformation

被引：11
作者：
Zhu, Y. T. [1 ]
Zhang, X. Y. [1 ]
Ni, H. T. [1 ]
Xu, F. [1 ]
Tu, J. [1 ]
Lou, C. [1 ]
机构：
[1] Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400044, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 548卷
基金：
中国国家自然科学基金;
关键词：
{11(2)over-bar 1} deformation twins; Dislocation reaction; Cobalt; Dynamic plastic deformation; CLOSE-PACKED METALS; SINGLE-CRYSTALS; HCP METALS; SLIP; ALLOYS; CO; DUCTILITY;
D O I：
10.1016/j.msea.2012.03.017
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The formation mechanism of the {1 1 (2) over bar 1} deformation twins in polycrystalline cobalt during dynamic plastic deformation has been proposed in this paper. It is found that the dislocation reactions play important roles in the nucleation and growth of {1 1 (2) over bar 1} deformation twins. The basal dislocations dissociate into sessile partials pinned at the intersection of two {1 1 (2) over bar 1} planes and glissile partials glided to nucleate twins on the (0 0 0 2) planes during the deformation. With the help of the applied stress, the dislocation reactions can be repeated, resulting in the formation of {1 1 (2) over bar 1} deformation twins. (C) 2012 Elsevier B.V All rights reserved.
引用
收藏
页码：1 / 5
页数：5
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