| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spatially Tailored Materials: Processing-Structure-Properties
|
| Presentation Title |
Diffusion gradients to rapidly explore composition space & precipitation behaviour of bcc-superalloys and refractory high entropy alloys. |
| Author(s) |
Alexander J. Knowles, Paraic O'Kelly, Vincent Gagneur, Adam Cretton, Matthew Lloyd |
| On-Site Speaker (Planned) |
Alexander J. Knowles |
| Abstract Scope |
Bcc-superalloys and refractory high entropy alloys (RHEAs) are next-generation materials for high temperatures applications of fusion, Gen-IV fission, gas turbines and concentrated solar power. However, there is a need to improve their balance of properties, tying together composition-microstructure-properties, specifically in the context of intermetallic precipitate formation to impart high temperature strength.
Here the use of diffusion gradients will be discussed to rapidly explore composition space for phase equilibria, as well as the resulted graded precipitation behaviour of bcc-superalloys and RHEAs. This will include (1) beta-Ti superalloy Ti-TiFe for oxidation resistance, strength & deformation behaviour, with tailored additions of Al and Cr (2) RHEAs such as WCrTaV and ZrTiNbV. These materials offer advantages of increased melting point and lower cost; while second-phase nano-structuring offers further advantage, for strength, creep resistance, as well giving new design bases for ductility and irradiation damage resistance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Titanium, High-Entropy Alloys |