Dislocation core structures in YAg, a ductile B2 CsCl-type intermetallic compound

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 d...

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Bibliographic Details
Published in:Scripta materialia 2008-06, Vol.58 (12), p.1066-1069
Main Authors: Xie, S., Russell, A.M., Becker, A.T., Gschneidner, K.A.
Format: Article
Language:English
Subjects:
Antiphase boundaries
Antiphase boundary
Deformation mechanisms
Dislocation structure
DISLOCATIONS
HRTEM
Intermetallic compound
INTERMETALLIC COMPOUNDS
Intermetallics
MATERIALS SCIENCE
Plastic deformation
Rare earth metals
SILVER ALLOYS
Stacking fault
YAG
YTTRIUM ALLOYS
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Summary: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.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2008.01.055