About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys II
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Presentation Title |
J-39: High-throughput CALPHAD-type Calculation in Design of Coherent Precipitate-strengthening Al-Co-Cr-Mo-Ti Refractory High Entropy Superalloys |
Author(s) |
Shao-Yu Yen, Hideyuki Murakami, Shih-kang Lin |
On-Site Speaker (Planned) |
Shao-Yu Yen |
Abstract Scope |
Refractory high entropy superalloys (RSAs) are one of the most recent developments of structural materials for high temperature applications, which have microstructures with disordered BCC (A2) and ordered B2 phases. However, such kind of microstructures suffer from the poor stability at high temperature because they are formed from spinodal decomposition. Besides, exploration for RSAs in the multi-dimensional composition space with trial-and-error experiments is costly and time-consuming. The present work employs CALPHAD method combined with high-throughput calculation (HTC) to quickly search the desired compositions with A2+B2 phases. Considering oxidation resistance and thermal stability, Al-Co-Cr-Mo-Ti quinary system is selected as the prototype. Experiments were carried out for verification, and the results showed a good agreement with the calculations. We propose a new calculation approach for RSAs design and demonstrate that high-throughput CALPHAD-type calculation is a powerful and reliable method for next-generation material’s design. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, High-Temperature Materials, Modeling and Simulation |