About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Multi-Principal Element Alloys III: Mechanical Behavior
|
Presentation Title |
D-13: High-throughput Fabrication of Refractory High-entropy Alloys |
Author(s) |
Rayna Mehta, Jesse Grant, Tim Weihs |
On-Site Speaker (Planned) |
Rayna Mehta |
Abstract Scope |
Refractory high entropy alloys are attractive for their mechanical properties at high temperatures. However, the vast compositional space presents a fabrication challenge: how does one quickly create hundreds of compositionally unique samples with bulk-like microstructures? Here we introduce a novel combinatorial method to do so by sputter depositing thick foils that can be processed and mechanically tested as free-standing samples at low and high temperatures. We analyze how various sputter parameters (ex: argon pressure and deposition rate) affect stresses in the foil. This analysis enables sputtering 10-200um thick foils that are annealed and rolled to produce bulk-like grain sizes and textures. In this study, we focus on Nb-Ti-Zr and Nb-Ti-Zr-Al alloys and screen the many samples based on their chemistry, phase, hardness, ductility, and oxidation. Through this methodology, we hope to find a range of compositions that yield single-phase, body centered cubic materials with strength, ductility, and oxidation resistance. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, High-Temperature Materials, |