|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Design and Simulation of Materials (CDSM 2018): Meso/Macroscale Simulations
||Phase Field Simulation of Microstructure Evolution Driven by Strong Grain Boundary Anisotropy Computed Using Realistic Models for Grain Boundary Energy
||Brandon Runnels, Josep Gras
|On-Site Speaker (Planned)
Nanocrystalline materials are known for their exceptional mechanical properties due to small grain size. As a result of their small characteristic length scale, grain boundaries (GBs) have been shown to be key players in a variety of mesoscopic processes, such as solidification, recrystallization, grain boundary migration, and severe plastic deformation. Numerous experimental and computational studies indicate that grain boundary energy is strongly dependent on the full geometric character of the interface. The lattice-matching grain boundary model (with relaxation) provides a means for determining the influence of anisotropic grain boundary energy on material properties with interface-dense structures such as twins and nanocrystalline metals. We present a phase-field model incorporating boundary energy computed on-the-fly, informed by crystallographic orientation relationship and interface inclination. This simulation framework, combined with the lattice-matching boundary model, is shown to accurately capture faceted microstructure observed experimentally.
||Planned: Supplemental Proceedings volume