Grain orientation, deformation microstructure and flow stress

被引：75
作者：
Hansen, N. [1 ]
Huang, X. [1 ]
Winther, G. [1 ]
机构：
[1] Tech Univ Denmark, Riso Natl Lab, Mat Res Dept, Ctr Fundamental Res Met Struct Dimens 4, DK-4000 Roskilde, Denmark
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 494卷 / 1-2期
关键词：
Grain orientation; Deformation microstructure; Flow stress;
D O I：
10.1016/j.msea.2007.10.086
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Dislocation structures in deformed metals have been analyzed quantitatively by transmission electron microscopy, high-resolution electron microscopy and Kikuchi line analysis. A general pattern for the microstructural evolution with increasing strain has been established and structural parameters have been defined and quantified. It has been found that two dislocation patterns co-exist in all grains, however, with very different characteristics dependent on grain orientation. This correlation with the grain orientation has been applied in modeling of the tensile flow stress and the flow stress anisotropy of fcc polycrystals. In conclusion some future research areas are briefly outlined. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：61 / 67
页数：7
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