| 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 |
From Co-Al-W-alloys to Advanced CoNi-base Superalloys |
| Author(s) |
Steffen Neumeier, Mathias Göken |
| On-Site Speaker (Planned) |
Steffen Neumeier |
| Abstract Scope |
The discovery of a Co3(Al,W) phase in the Co-Al-W system more than a decade ago stimulated worldwide research on γ/γ' Co-base superalloys. However, the initial Co-Al-W-based alloys suffered from a poor oxidation resistance, low phase stability and high density.
In this talk, an overview about the investigations on the effect of elements on the alloy system and the interdiffusion coefficients of transition metals in Co are presented. It is shown, how alloying elements affect the thermo-physical properties, microstructures, mechanical properties, oxidation resistance and diffusion, and how this resulted in the development of advanced γ/γ' CoNi-base superalloys with promising properties. The differences and similarities as well as advantages and disadvantages of these novel Co-base superalloys are compared to the established Ni-base superalloys and their future prospects are discussed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |