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

Authors
MOLENAT G CAILLARD D SUN Y COURET A
Citation
G. Molenat et al., SUBSTRUCTURE OF DISLOCATIONS IN THE (111) PLANE IN NI3GA SINGLE-CRYSTALS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 164(1-2), 1993, pp. 407-410
Citations number
13
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
164
Issue
1-2
Year of publication
1993
Pages
407 - 410
Database
ISI
SICI code
0921-5093(1993)164:1-2<407:SODIT(>2.0.ZU;2-I
Abstract
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 identifie d, corresponding respectively to a very short-range cross-slip process and a long-range cross-slip process (Kear-Wilsdorf configuration) ont o the (010) cube cross-slip plane. Both sessile configurations were ob served to unlock by the reverse cross-slip process leading to their fo rmation: the first at low and possibly high temperatures, and the seco nd at high temperatures only.