About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
First-Principles Study of the Order-Disorder Transition in the AlCrTiV High Entropy Alloy |
Author(s) |
Michael Widom |
On-Site Speaker (Planned) |
Michael Widom |
Abstract Scope |
The AlCrTiV high entropy alloy undergoes an order-disorder transition from body centered cubic (Strukturbericht A2) at high temperatures to the CsCl structure (B2) at intermediate temperatures. We model this transition using first principles Monte Carlo/molecular dynamics simulations. Simulation results yield the temperature-dependent energy, entropy, heat capacity, occupancy fluctuations, and diffraction patterns. The contribution of chemical disorder to the entropy is calculated on the basis of point and pair cluster frequencies. The simulated structures exhibit compensated ferrimagnetism, and the Fermi level lies in a pseudogap. Sensitivity to the exchange-correlation functional is discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Magnetic Materials, Phase Transformations |