Dislocation core structures in YAg, a ductile B2CsCl-type intermetallic compound

TitleDislocation core structures in YAg, a ductile B2CsCl-type intermetallic compound
Publication TypeJournal Article
Year of Publication2008
AuthorsXie S, Russell AM, Becker AT, Gschneidner KA
Journal TitleScripta Materialia
Date PublishedJun
Type of ArticleArticle
ISBN Number1359-6462
Accession NumberISI:000255900200008
Keywordsalloys, antiphase boundary, dislocation structure, HRTEM, INTERMETALLIC COMPOUND, mechanical-properties, stacking fault

Dislocations are thought to be the primary mechanism for plastic deformation in the ductile B2 YAg compound, but no reports have been made on whether partial dislocations are operating. Here, direct observations made by high-resolution transmission electron microscopy show that in YAg superlattice dislocations dissociate into two superpartials bound to either a stacking fault or an antiphase boundary. A better understanding of dislocation core structures in YAg should improve the understanding of deformation mechanisms in the family of ductile rare-earth B2 intermetallics. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Alternate JournalScr. Mater.