| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Physics-based Simulations of Microstructural Evolution Using Graph Theory |
| Author(s) |
Iman Javaheri, Veera Sundararaghavan |
| On-Site Speaker (Planned) |
Iman Javaheri |
| Abstract Scope |
A novel physics-based numerical framework based on graph-theoretic techniques is presented for the microstructure evolution of ceramic materials. The primary driving force for crystal formation, precipitate coarsening, and grain growth in the ceramic microstructures is the reduction of orientation-dependent surface free energies. As a result, the equilibrium shape of the crystalline structure (i.e., Wulff construction) can be precisely determined by minimizing its surface free energy. Here, an energy optimization principle based on the Cauchy-Crofton formulation, which embodies the underlying energetic mechanisms of grain boundary (GB) formation, is developed to find the global minimum facets (Wulff shape) in 2D/3D domain for a given set of Riemannian metrics. The efficacy of the proposed technique is demonstrated in several case studies and compared against data from in-situ high-energy tomography techniques. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
ICME, Computational Materials Science & Engineering, Characterization |