| About this Abstract |
| Meeting |
3rd World Congress on High Entropy Alloys (HEA 2023)
|
| Symposium
|
HEA 2023
|
| Presentation Title |
Combinatorial Exploration of Passivating Elements on Refractory High Entropy Alloys |
| Author(s) |
Sebastian Lech, Elaf Anber, David Beaudry, Howie Joress, Charlie Brandenburg, Brian DeCost, Elizabeth Opila, Mitra Taheri |
| On-Site Speaker (Planned) |
Sebastian Lech |
| Abstract Scope |
Refractory high entropy alloys (RHEAs) are candidate materials for next-generation high-temperature materials surpassing superalloys. However, despite high melting temperatures and promising mechanical properties, their oxidation resistance remains a challenge, limiting their applicability in extreme environments. Systematic exploration of passivating elements role is the key to unlocking the full potential of RHEAs.
Current work explores experimental design strategies to enhance the oxidation resistance of RHEAs. The focus is on the addition of passivating elements and the development of compositional gradients using additive manufacturing via the directed energy deposition technique. The role of passivating elements on oxide scale formation was investigated by high-resolution scanning- and transmission electron microscopy along with phase analysis and thermodynamic modeling. Obtained results can be used as a guideline towards sufficient oxidation resistance of RHEAs for applications in aerospace and energy. |
| Proceedings Inclusion? |
Planned: Metallurgical and Materials Transactions |