About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Elements Alloys X: Structures and Modeling
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Presentation Title |
Exploration of Refractory Complex Concentrated Alloys through the Use of High-throughput Calculations and Experimentation |
Author(s) |
Austin M. Hernandez, Sharmila Karumuri, Sona Avetian, Zachary McClure, Logan Ware, Alejandro Strachan, Ilias Bilionis, Kenneth Sandhage, Michael Titus |
On-Site Speaker (Planned) |
Austin M. Hernandez |
Abstract Scope |
Due to several attractive properties of refractory complex concentrated alloys (RCCAs), such as high temperature ductility, strength, and phase stability, they are considered to be excellent candidate materials to replace Ni-based superalloys in high temperature, oxidizing environments. Unfortunately, RCCAs typically fail catastrophically in oxidizing environments at intermediate and high temperatures. Out of millions of possible high strength and oxidation resistant RCCA compositions, we evaluate several promising compositions exploring a design space of 9 refractory elements (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W) and aluminum. To systematically interrogate the oxidation and hardness, the compositions are first evaluated using CALPHAD methods generated from down-selected calculations along a pareto front. In addition, machine learning coupled with an active learning loop is utilized. To facilitate high-throughput experimentation, diffusion couples of Al-containing alloys with Al-free compositions have been explored, and the hardness and oxidation behavior along the concentration gradients have been evaluated. |
Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |
Keywords |
High-Temperature Materials, High-Entropy Alloys, Machine Learning |