The interaction between extended dislocations and antiphase domain boundaries - II: uncoupled superpartial dislocations and planar slip

Citation
Ts. Rong et al., The interaction between extended dislocations and antiphase domain boundaries - II: uncoupled superpartial dislocations and planar slip, INTERMETALL, 9(6), 2001, pp. 507-514
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
INTERMETALLICS
ISSN journal
0966-9795 → ACNP
Volume
9
Issue
6
Year of publication
2001
Pages
507 - 514
Database
ISI
SICI code
0966-9795(200106)9:6<507:TIBEDA>2.0.ZU;2-K
Abstract
Due to their interactions with antiphase domain boundaries, superdislocatio ns can move effectively as uncoupled superpartial dislocations in ordered s tructures. It is shown that there is a critical domain size below which thi s will occur irrespective of the grain size and APE energy. Our analysis al so indicates that, because of superdislocation/domain boundary interactions , the stress required to move a superdislocation on a 'fresh' slip plane is maximum. Once superdislocations glide over a slip plane, an increasingly e asy slip channel is created for the following superdislocations gliding on the same plane. Therefore, planar slip is expected. The smaller the APD siz e, the more likely is planar slip. (C) 2001 Elsevier Science Ltd. All right s reserved.