About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamental Science of Microstructural Evolution and Phase Transformations: An MPMD/FMD/SMD Symposium in Honor of Peter Voorhees
|
| Presentation Title |
Phase-field modeling of microstructure evolution driven by strongly anisotropic interfaces |
| Author(s) |
Carla Rospigliossi Georger, Enugala Sumanth Nani, Thomas Philippe, Hervé Henry, Mathis O. Plapp |
| On-Site Speaker (Planned) |
Mathis O. Plapp |
| Abstract Scope |
When the interface free energy of a crystal is so strongly anisotropic that the interface stiffness becomes negative, the equilibrium shape exhibits sharp ridges and corners. In this situation, both the sharp-interface equations and phase-field models for interface motion are ill-posed. We use a phase-field model in which these singluarities are regularized by the addition of a Willmore free energy to simulate several pattern formation processes. We study the coarsening of pseudo-facets after the occurrence of a Herring instability and find that the scaling laws for coarsening depend on the orientation of the initial flat surface. The influence of the pseudo-facets on the breakup of anisotropic nanowires is also studied. Finally, we show that growth from solution can produce dendrites with a corner on their tip, and we discuss the role of the corner size in the selection of the operating state. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Phase Transformations, Solidification |