Core properties of dislocations in YCu and YAg B2 intermetallic compounds
|Title||Core properties of dislocations in YCu and YAg B2 intermetallic compounds|
|Publication Type||Journal Article|
|Year of Publication||2010|
|Authors||Chen Q, Ji M, Wang CZ, Ho KM, Biner SB|
|Keywords||ab initio calculations, alloys, cross-slip, defects: dislocation geometry and arrangement, dissociation, energy, mechanical-properties, NIAL SINGLE-CRYSTALS, peierls-nabarro model, rare-earth intermetallics, simulations, stability|
In this study, the dissociation and core properties of dislocations with the Burgers vectors  and  in YCu and YAg B2 rare-earth intermetallic compounds were investigated by utilizing the generalized Peierls-Nabarro model. The results are compared with those seen for the common B2 intermetallic alloy MAL The results indicate that the dislocations with the Burgers vector  in the three intermetallics exhibit similar dissociation characteristics and the core sizes. On the other hand, owing to the lower stacking fault energy along the  direction in YAg and YCu, the dislocations with the Burgers vector  show a different dissociation in comparison to those seen in NiAl, indicating an easier activation of the  slip modes in YCu and YAg. (C) 2009 Elsevier Ltd. All rights reserved.
|URL||<Go to ISI>://000274970700003|