Slip patterns and preferred dislocation boundary planes

被引:91
作者
Winther, G [1 ]
机构
[1] Riso Natl Lab, Dept Mat Res, Ctr Fundamental Res Met Struct 4D, DK-4000 Roskilde, Denmark
关键词
forming processes; metal and alloys; microstructure; deformation structure; dislocation boundaries;
D O I
10.1016/S1359-6454(02)00423-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The planes of deformation induced extended planar dislocation boundaries are analysed in two different co-ordinate systems, namely the macroscopic system defined by the deformation axes and the crystallographic system given by the crystallographic lattice. The analysis covers single and polycrystals of fee metals in three deformation modes (rolling, tension and torsion). In the macroscopic system, boundaries lie close to the macroscopically most stressed planes. In the crystallographic system, the boundary plane depends on the grain/crystal orientation. The boundary planes in both co-ordinate systems are rationalised based on the slip. The more the slip is concentrated on a slip plane, the closer the boundaries lie to this. The macroscopic preference arises from the macroscopic directionality of the slip. The established relations are applied to (a) prediction of boundary planes from slip patterns and (b) prediction of slip patterns from boundary planes. (C) 2002 Acta. Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:417 / 429
页数:13
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