SUBSTRUCTURE OF DISLOCATIONS IN THE (111) PLANE IN NI3GA SINGLE-CRYSTALS

被引：9

作者：

MOLENAT, G ^{[1
]}

CAILLARD, D ^{[1
]}

SUN, Y ^{[1
]}

COURET, A ^{[1
]}

机构：

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

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 164卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90702-G

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The weak-beam transmission electron microscopy imaging method was used to investigate the core structure of the [101BAR] (111) dislocations in an Ni3Ga single crystal predeformed at 20-degrees-C, 200-degrees-C and 400-degrees-C. Two different sessile configurations were identified, corresponding respectively to a very short-range cross-slip process and a long-range cross-slip process (Kear-Wilsdorf configuration) onto the (010) cube cross-slip plane. Both sessile configurations were observed to unlock by the reverse cross-slip process leading to their formation: the first at low and possibly high temperatures, and the second at high temperatures only.

引用

页码：407 / 410

页数：4

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