About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithms Development in Materials Science and Engineering
|
Presentation Title |
Enumeration and first-principles based parameterization of interfaces and transformation pathways in alloys using CASM |
Author(s) |
Brian Puchala, Anton Van der Ven, Sesha Sai Behara |
On-Site Speaker (Planned) |
Brian Puchala |
Abstract Scope |
Models for property prediction and microstructural evolution of alloys require accurate parameterization of thermodynamic properties, such as free enegies, and the energetics of crystal defects, such as interfaces, and the energetics of the atomistic mechanisms that occur during their evolution. CASM is an open source software package which (i) constructs cluster expansion effective Hamiltonians including the coupled effect of chemical, mechanical, vibrational, and magnetic degrees of freedom, (ii) fits expansion coefficients using density functional theory (DFT) calculations, and (iii) use the Hamiltonians in (kinetic) Monte Carlo calculations of finite temperature thermodynamic and kinetic properties. In this talk, we introduce methods implemented in CASM that use crystal symmetry to efficiently and systematically enumerate interfaces and transformation pathways controlling the kinetics of phase transformations and microstructural evolution in alloys. We describe the application of these methods to diffusion and twinning mechanisms in Mg and consider alloying effects in the Mg-Zn-Ca alloy system. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Magnesium, Computational Materials Science & Engineering |