About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
Super-Cell Random APproximates (SCRAPs) – improved tool to rapidly generate models of high-entropy alloys and intermetallics for materials design |
Author(s) |
Duane D Johnson, Dhruv Raturi, Prashant Singh, Andrey Smirnov, William A Shelton, Kirill Kovnir |
On-Site Speaker (Planned) |
Duane D Johnson |
Abstract Scope |
High-Entropy Alloys (HEAs) and Intermetallics (HEIs) have intriguing properties (e.g., like high-temperature strength and creep, or catalytic) that can be quantitively designed with reliable models. Building on our density-functional theory (DFT) materials design, we address various bulk, interface, and surface property optimization for HEAs/HEIs. We have extended our Super-Cell Random APproximates (SCRAPs 2.0) method to create HEAs/HEIs having arbitrary chemical compositions and disorder with multiple sublattices (partial order) and specifically-oriented (hkl) interfaces. SCRAPs2.0 creates the required complex cells in seconds to minutes. We showcase SCRAPs for high-temperature HEA design (strength, creep, …) and for Hydrogen-Evolution Reaction (HER) HEA/HEI electrocatalysts design, such as CoCrFeNi or alloysed-Ni2P intermetallics, as validated experimentally. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, High-Entropy Alloys, Computational Materials Science & Engineering |