|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Computational Methods for Spatio-temporal Scale-bridging: from Atomistics to Mesoscale
||A Multi-scale Approach to Shearing of Ordered Intermetallic Phase in Multi-phase Alloys: Bridging Ab Initio Calculation and Phase Field Simulation
||Duchao Lv, Pengyang Zhao, Donald McAllister, Michael Mills, Yunzhi Wang
|On-Site Speaker (Planned)
Many commercial alloys are strengthened by ordered intermetallic phases whose deformation involves complicated dislocation and stacking-fault configurations at mesoscales. To quantify various possible deformation pathways, we use a combination of ab initio calculation and microscopic phase field simulation to study interactions between dislocations and ordered precipitates in realistic microstructures seen in commercial alloys. The critical resolved shear stresses for different dislocation + stacking fault shearing events taking place in multi-phase microstructures are quantified and deformation mechanism maps are developed. Modeling framework on incorporating the detailed deformation mechanisms discovered at the mesoscopic scale into continuum level FEM to capture macroscopic responses will also be discussed.
||Planned: A print-only volume