| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
|
| Presentation Title |
Grain Boundary Mobilities in Polycrystalline Materials |
| Author(s) |
Jin Zhang, Phillip Staublin, Henning Poulsen, James Warren, Peter W. Voorhees |
| On-Site Speaker (Planned) |
Peter W. Voorhees |
| Abstract Scope |
The mobilities of grain boundaries are fundamental to understanding grain growth processes in materials. By comparing the evolution of experimentally determined three-dimensional grain structures measured using diffraction contrast tomography to those derived from phase field simulation, we determine the reduced mobilities of thousands of grain boundaries. Through this approach the reduced grain boundary mobilities of over 1300 grain boundaries in iron are determined. We find that the grain boundary mobilities are largely independent of the five macroscopic degrees of freedom given by the misorientation of the grains and the inclination of the grain boundary. To further probe this large data set, a single order parameter, quantitatively accurate, phase field method that accounts for all five degrees of freedom of the grain boundary energy has been developed. The results of the phase field simulations and the potential role of trijunctions in the evolution of polycrystalline materials will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, |