|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Atomic-Scale Studies of Defect Interactions with Homo- and Heterophase Interfaces
||Enrique Martinez Saez, Blas Uberuaga, Irene Beyerlein
|On-Site Speaker (Planned)
||Enrique Martinez Saez
The ability of interfaces to dictate the material response resides inherently in their atomic structure, which controls the interactions of dislocations and defects with the interface. We show how dislocations nucleated from defect clusters interact with a heterophase interface in Cu–Nb layered composites. We show how the ability of the interface to absorb vacancy clusters depends on the atomic structure at the interface. We also elaborate on the effect of the atomic structure on the ability of the interface to absorb dislocations as well as vacancy and self-interstitial defect clusters. We study a Kurdjumov–Sachs orientation in a Cu–Nb interface and an asymmetric Σ11 grain boundary in pure Cu. On the one hand, the manner in which dislocations react with the interface depends on the misfit dislocation arrangement, which substantially differs between these two cases. On the other hand, vacancy and self-interstitial clusters are absorbed similarly upon interaction with both structures.