| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Gamma (FCC)/Gamma-Prime (L12) Co-Based Superalloys III
|
| Presentation Title |
Microstructural and Compositional Design of Multicomponent Co/Ni-based Superalloys using High-throughput Diffusion Multiples |
| Author(s) |
Wendao Li, Changdong Wei, Longfei Li, Ji-Cheng Zhao, Qiang Feng |
| On-Site Speaker (Planned) |
Qiang Feng |
| Abstract Scope |
In order to systematically understand the alloying effects on novel Co/Ni-based multicomponent alloys and accelerate their development, high-throughput diffusion multiples were used to study the effects of substituting W with γ′ former elements (Al, Ti, Mo, Nb, Ta) and the effects of γ former elements (Ni and Cr) on phase equilibrium at 1000 oC of Co-Ni-Al-W-Ta-Ti-based alloys. The experimental results indicate that W can be partly substituted by lower-density alloying elements such as Al, Ti, Cr and Mo to reduce alloy densities without promoting the precipitation of secondary phases. Both Nb and Ta addition strongly reduce the γ/γ′ microstructural stability. The high-content of Ni addition promotes the formation of W-rich TCP phases. Very large amounts of data gathered from the diffusion multiples can be used to improve the thermodynamics database and to serve as input to machine learning to further understand the phase equilibria and accelerate alloy development. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |