Deformation of Co3AlC0.5 and a Co3AlC0.5-strengthened cobalt-based alloy

Authors
Wei, FG Hwang, KY Mishima, Y
Citation
Fg. Wei et al., Deformation of Co3AlC0.5 and a Co3AlC0.5-strengthened cobalt-based alloy, INTERMETALL, 9(8), 2001, pp. 671-679
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
INTERMETALLICS
ISSN journal
09669795 → ACNP
Volume
9
Issue
8
Year of publication
2001
Pages
671 - 679
Database
ISI
SICI code
0966-9795(200108)9:8<671:DOCAAC>2.0.ZU;2-6
Abstract
Plastic deformation features Of Co3AlC0.5, and a Co3AlC0.5-strengthened cob alt-based alloy were studied by means of transmission electron microscopy. It was found that < 110 > {111} slip system is activated and dissociation o f superlattice dislocations occurs in Co3AlC0.5 in a manner similar to the Ll(2) structure. However, in contrast to the Ll(2) structure, motion of dis locations is hindered by the pre-existing thermally grown-in anti-phase bou ndaries formed by wrong site occupation of carbon atoms, a unique type of c rystal defects in Co3AlC0.5. On the other hand. deformation of the a(Co) al loy containing fine Co3AlC0.5. precipitates is characterized by localized s lip of 1/6 < 211 > Shockley partial dislocations cutting through the fine C o3AlC0.5 particles.. leaving behind a highly disordered band region. (C) 20 01 Elsevier Science Ltd. All rights reserved.