| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Room Temperature Tensile Ductility in a Cr-based Alloy |
| Author(s) |
Bryan Lim, Rangasayee Kannan, Jeffrey M. Brookins, Marissa Brennan, Steve Buresh, Brian Gordon, Michael Spencer, Peeyush Nandwana |
| On-Site Speaker (Planned) |
Bryan Lim |
| Abstract Scope |
As the performance limits of Ni-based superalloys are reached at high temperatures, Cr-based alloys have garnered renewed interest due to their higher melting point. However, room temperature tensile ductility in Cr-based alloys has been rarely demonstrated, except in cases of ultra-high purity Cr or significant additions of Re (>20 at%), posing challenges for industrial-scale applications due to formability issues and cost. In this study, we present the development of a ductile Cr-based alloy composition using high-throughput CALPHAD calculations, achieved without Re additions. The optimal composition was consolidated via (i) vacuum arc-melting and (ii) powder metallurgy methods followed by heat treatments. Room temperature tensile tests confirmed ductility in both consolidation methods, with elevated temperature tensile tests (760 °C) also revealing minimal high temperature strength degradation. We discuss the alloying decisions, processing considerations, and microstructural mechanisms, informed by multiscale microscopy, that contributed to achieving a ductile Cr-based alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Mechanical Properties, High-Temperature Materials |