| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
Design of γ’-strengthened Co/Ni-based Superalloys |
| Author(s) |
Eric A. Lass |
| On-Site Speaker (Planned) |
Eric A. Lass |
| Abstract Scope |
Co-based alloys strengthened by coherent L12-γ’ precipitates have been extensively studied in recent years as potential alternatives to Ni-based superalloys in high temperature applications. Properties such as increased melting temperature, decreased segregation during solidification, and improved environmental resistance offer potential benefits over Ni-based alloys in some applications. The significant research efforts have produced a significant amount of thermodynamic and phase equilibria data for Co-based alloy systems where little was previously known; which has allowed the development new of Calphad thermodynamic databases focused on Co-based alloys. This work applies computational thermodynamics to design new Co-based γ’-strengthened alloys with improved properties specific to particular applications such as single-crystals, cast and wrought alloys, or additive manufacturing. Microstructure and properties of a recent compositionally-optimized Co/Ni-based alloy are presented, and demonstrate an extremely promising combination of high creep resistance and oxidation resistance. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |