| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Development of Coherent Ru-based BCC + B2 Alloys with High Thermal Stability |
| Author(s) |
Carolina Frey, Haojun You, Sebastian Kube, Kaitlyn Mullin, Andrew Detor, Scott Oppenheimer, Tresa Pollock |
| On-Site Speaker (Planned) |
Carolina Frey |
| Abstract Scope |
Refractory Multi-Principal Element Alloys (RMPEAs) are a new class of structural alloys for extreme environments with the potential to push operating temperatures above 1200 °C. However, the development of alloys that can operate at desired temperatures of 1300-1400 °C has been limited by a lack of strengthening precipitates that can persist at the target temperatures. Recently, HfRu-based B2 precipitates have been shown to be stable above 1200 °C. Alloys in the Hf-Mo-Nb-Ta-V-Ru system have been developed to produce alloys with coherent Ru-B2 precipitates stable at 1300 °C. A series of heat treatments between 1300-1900 °C are presented to refine the two-phase microstructure and tailor hardness. Precipitate volume fractions, sizes and spacings are evaluated. Alloys were also characterized by XRD, SEM and TEM methods. Nanopillar compression experiments were also performed to understand dislocation interactions with precipitates. |
| Proceedings Inclusion? |
Planned: |