PI: Yulan Li

Deformation-induced dynamic recrystallization (DRX) is often observed in SPP. Our aim is to understand microstructure evolution under SPP and provide fundamental basis for optimizing SPP parameters to achieve desired microstructures and properties. We developed an in-house code of DRX by integrating phase field method and crystal plasticity theory. The open source of crystal plasticity (DAMASK) is used to simulate large plastic deformation and output information for calculating dislocation density and grain misorientation in polycrystalline material with distributed second-phase particles. Calculated geometrically necessary dislocation density, grain misorientation, and deformation energy are used to analyze the nucleation and growth of DRX. The model has been applied to study the effect of Shear Assisted Processing and Extrusion (ShAPE) operation parameters on DRX, the effect of second particles on grain refinement, and dislocation evolution in biomaterial polycrystals.