GLIDE SEQUENCES OF DEFORMATION IN THE (111) PLANE OF NI3GA SINGLE-CRYSTALS IN THE YIELD STRESS ANOMALY

被引：50

作者：

COURET, A ^{[1
]}

SUN, YQ ^{[1
]}

HIRSCH, PB ^{[1
]}

机构：

[1] UNIV OXFORD,DEPT MAT,OXFORD OX1 3PH,ENGLAND

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1993年 / 67卷 / 01期

关键词：

D O I：

10.1080/01418619308207141

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ni3Ga single crystals oriented parallel to the [123BAR] direction were deformed in the range of the yield stress anomaly. Successive deformations have also been performed at different temperatures on the same specimen. The substructure of dislocations in the (111) plane has been observed by weak-beam microscopy. The screw dislocations are in the Kear-Wilsdorf configuration and contain many superkinks, the shape of which has been analysed. Simple superkinks and switch-over superkinks have been observed. A statistical analysis of the superkink height has revealed two types of deformation sequence. The locking process corresponding to one of these is thermally activated while that of the other has a geometric cause.

引用

页码：29 / 50

页数：22

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