About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Re-Co Based BCC-B2 Refractory Multiprincipal Element Alloy Systems |
| Author(s) |
Kirmina Monir, Ben Neuman, Carolina Frey, Sebastian A Kube, Tresa M. Pollock |
| On-Site Speaker (Planned) |
Kirmina Monir |
| Abstract Scope |
Refractory multi-principal element alloys offer a promising route for future high-temperature materials due to their high melting points; however, many suffer from poor ductility and strength loss at elevated temperatures. One approach to address these limitations mimics the γ–γ′ microstructure of Ni superalloys by forming a ductile BCC matrix with B2 intermetallic precipitates. While Ru-based systems have shown great promise, Ru’s high cost limits scalability. In this work, the Re–Co-based RMPEA design space was explored as a more cost-effective route to achieve BCC–B2 microstructures. Alloys were produced via arc melting and characterized in both the as-cast and heat-treated conditions. Transmission electron microscopy was used to verify phase composition, thermal stability, and precipitate coherency. Mechanical testing and dislocation analysis were performed to evaluate strengthening mechanisms. The results indicate that Re–Co-based BCC–B2 RMPEAs may provide a balanced combination of strength, ductility, and thermal stability, while offering a lower-cost alternative to Ru-containing systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, High-Entropy Alloys, |