About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
High Temperature Mechanical Behaviour of Novel Chromium Superalloys via Small Punch Testing |
| Author(s) |
Thomas Blackburn, Kan Ma, Rebeca Hernandez, Michael Kerbstadt, Tatu Pinomaa, Mathias Galetz, Marta Serrano, Alexander Knowles |
| On-Site Speaker (Planned) |
Thomas Blackburn |
| Abstract Scope |
Next generation Concentrated Solar Power (CSP) plants aim to achieve efficiency improvements through the use of supercritical CO2 Brayton cycle combined with novel ceramic particles as heat transfer media. Such a operate design represents an extreme environment, including temperatures >700°C, pressures >25 MPa, corrosive/oxidising atmospheres and particle erosion/wear. Current candidates including nickel-based superalloys and austenitic steels are excellent for many high-temperature applications, however, have limitations on cost, environmental & erosion resistance in this application. Chromium presents an exciting alternative owing to its high melting point and high-temperature oxidation resistance. However, Cr alloys are often limited by their Ductile to Brittle Transition Temperature (DBTT) being greater than room temperature. Here a β/β’ BCC-superalloy, comprising an A2 chromium matrix with B2 nickel-aluminide intermetallic precipitates has been developed. The mechanical properties (small punch), and oxidation (TGA) resistance are investigated, and results presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Other |