|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Non-equilibrium Features of Grain Boundaries
||Dislocation Interactions with Bi-phase Interfaces Using Phase Field Dislocation Dynamics (PFDD)
||Abigail Hunter, Irene Beyerlein
|On-Site Speaker (Planned)
This research is focused on investigating bi-phase interfaces in nano-layered composites using a mesoscale method called phase field dislocation dynamics (PFDD). Nano-layered composites, consisting of two of more dissimilar phases, have great potential to achieve many outstanding structural properties simultaneously. In recent years, they have been shown to possess not only enhanced strength but also better stability in harsh environments than their coarse-grained counterparts. Many of these unique properties are due to the increased density of bi-material interfaces in nano-layered composites. Mechanisms such as slip transmission can occur, resulting in a significant contribution toward overall material strength. Furthermore, gliding dislocations may interact with misfit dislocations present in the interface region. These misfit dislocations can have different spacing and configurations depending on the difference in lattice parameter mismatch between the two layered metals. Advantageously, mesoscale methods such as PFDD are at a length scale where such mechanisms can be investigated.
||Planned: Supplemental Proceedings volume