About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Discovery and Design of Materials
|
Presentation Title |
Tailoring Oxidation Resistance of Refractory High Entropy Alloys by a Combined First-principles and CALPHAD Approach |
Author(s) |
Shuang Lin, Shun-Li Shang, Allison M. Beese, Zi-Kui Liu |
On-Site Speaker (Planned) |
Shuang Lin |
Abstract Scope |
Refractory high entropy alloys (RHEA) show promise as materials for high-temperature structural applications, thanks to their impressive mechanical properties. However, concerns have been raised regarding the oxidation behavior of RHEA, including potential pest oxidation or complete oxidation at elevated temperatures. This work aims to investigate the oxidation behavior of RHEA by analyzing binary refractory oxides and ternary rutile-type oxides, such as CrMO4 (M = Nb and Ta), using a first-principles method. The thermodynamic stability of these oxides at different temperatures is assessed through predicted Ellingham diagrams and CALPHAD-based thermodynamic calculations. Two case studies are utilized to validate the predictions: 1) the design of Cr-containing alloys using the machine learning-based inverse design approach and 2) the analysis of RHEAs (NbTiZrV and NbCrVWTa) reported in the literature. These case studies will provide valuable insights into the thermodynamic stability of oxides in RHEA. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, |