About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments III
|
| Presentation Title |
Influence of Microalloying on the High Temperature Oxidation and Mechanical Properties of Chromium-Silicon Alloys |
| Author(s) |
Dipiyanka Shrestha, Emma White, Mathias Christian Galetz, Anke Silvia Ulrich, Jonas Witzgall |
| On-Site Speaker (Planned) |
Dipiyanka Shrestha |
| Abstract Scope |
Chromium-silicon alloys are a promising alternative to Ni-based alloys for future high-temperature aerospace and structural applications due to their higher melting point, lower density, and greater elemental abundance. However, their practical use is limited by challenges like poor room-temperature ductility due to a high ductile-to-brittle transition temperature (DBTT) and nitrogen-induced embrittlement along with limited oxidation resistance above 1200°C. To overcome these issues, Cr-Si alloys were microalloyed and alloyed up to 3% with Y, Zr, and Pt and annealed at 1200°C for 100 hours. Alloying effects on phase evolution and microstructure were investigated, while hardness measurements with crack analysis were employed as a first indication of room temperature toughness. Oxidation tests up to 1200 °C examined oxide scale formation and stability and the influence of the microalloyed dopants on the oxidation kinetics. Results show that targeted microalloying enhances oxidation resistance and mechanical properties, improving the performance of Cr-Si alloys under extreme conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Phase Transformations, Characterization |