| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Mechanical and Environmental Behaviour of Novel Cr(Fe)-NiAl bcc-Superalloys Tailored for High Temperature Applications |
| Author(s) |
Thomas Blackburn, Kan Ma, Michael Kerbstadt, Rebeca Hernandez, Marta Navas, Marta Serrano, Mathias Galetz, Alexander Knowles |
| On-Site Speaker (Planned) |
Thomas Blackburn |
| Abstract Scope |
Improving the thermal efficiency of concentrated solar power requires materials that can withstand extreme environments. With operating temperatures >700°C, pressures >25 MPa combined with oxidising atmospheres (air/sCO2); material selection presents significant challenges. Current state-of-the-art materials for high temperature applications (advanced Ni-superalloys) provide an excellent solution to many extreme applications, however, they present limitations in high temperature (>900°C) yield stress and corrosion resistance. Chromium provides an interesting alternative owing to its innate high melting point, corrosion/oxidation resistance and good thermal conductivity. However, chromium suffers from an above room temperature DBTT and reduced oxidation resistance at very high temperatures (>900°C) restricting their engineering adoption. Novel β/β’ chromium based bcc-superalloys (Cr(Fe)-NiAl) comprising an A2 chromium matrix, strengthened by B2 NiAl precipitates have been developed as foundation research into this nascent class of materials. Mechanical testing (small punch and sub-scale tensile) and exposure to oxidative environments (TGA and cross-sectional analysis) results will be presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, Other |