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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Computational Thermodynamics and Kinetics
Presentation Title Anisotropic Phase Field Modeling of Tricrystal Grain Growth Using a Spherical-Gaussian-Based 5-D Computational Approach
Author(s) Lenissongui Cedric Yeo, Jacob Bair
On-Site Speaker (Planned) Lenissongui Cedric Yeo
Abstract Scope The Spherical-Gaussian approach, previously linked to the epsilon and gamma models developed by Moelans, successfully incorporated 5-D anisotropy into bicrystal simulations and now extends to tricrystal investigation. Grain orientations and misorientations are represented using quaternions. To analyze grain boundary evolution in tricrystal scenarios, a segment of the fundamental zone for Σ3 grain boundaries is taken from Olmsted's work, providing a specific minima library. System misorientations between grain pairs are compared using 2-D Gaussian switches, referencing the minima misorientations list. Activating these switches reduces the base energy to the minima library energy. Tricrystal simulations, conducted using the Multiphysics Object Oriented Simulation Environment (MOOSE), test both epsilon and gamma models. Results demonstrate that anisotropy in GB energy alone significantly affects microstructural evolution compared to adding anisotropic GB mobility. Flexible simulation settings lead to diverse microstructural behaviors, highlighting the models' adaptability and versatility under varying conditions.
Proceedings Inclusion? Planned:
Keywords Computational Materials Science & Engineering, Modeling and Simulation,

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