| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Powder Metallurgy Co Base Superalloys and High Entropy Alloys: Beyond Ni-base Superalloys for High-temperature Applications |
| Author(s) |
Jose M. Torralba, Venkatesh S. Kumaran, Alexander Mejia-Reinoso, Alberto Meza, Ahad Mohammadzadeh, Dariusz Garbiec, Monica Campos |
| On-Site Speaker (Planned) |
Jose M. Torralba |
| Abstract Scope |
Ni-based superalloys have been the most popular material for high-temperature applications. The predominance of these alloys is related to their primary strengthening mechanism, the γ’ precipitation on an FCC γ matrix, together with the high solvus temperature of the γ’ precipitates. In recent years, alternative alloys, such as Co-based superalloys with a similar γ-γ’ microstructure and high-entropy alloys, have shown they can compete in the same field as Ni-based superalloys. In this competition, additive manufacturing and high densification powder metallurgy methods, have opened an opportunity window for PM. PM methods allow better chemical control, finer and homogeneous microstructure and, in AM methods, higher freedom in the design of the parts. The purpose of this work is to review some possibilities, including the use of Co, Co-Ni superalloys, and high-entropy alloys, as well as the use of PM methods (selective laser melting, field-assisted sintering), which provide competitive properties at high temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, High-Temperature Materials, High-Entropy Alloys |