About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Modeling Thermal Expansion Coefficient in Ni-Based Superalloys |
| Author(s) |
Chunan Li, Greta Lindwall |
| On-Site Speaker (Planned) |
Chunan Li |
| Abstract Scope |
The compatibility in thermal expansion between components is crucial in designing materials that can withstand large temperature variations without cracking or failing. For commercial Ni-based superalloys, experimental measurements have shown that coefficient of thermal expansion (CTE) is sensitive to temperature and alloy composition, which is difficult to describe using existing models. In this work, we present a CALPHAD-based multi-phase CTE model, from which the effect of individual alloying element on CTE of each phase is considered. The effect of heat treatment is considered by introduction of a freeze-in temperature for phase fraction calculations, enabling prediction of CTE across the entire relevant temperature range. The model-predicted CTE agrees well with experimental measurements for commercial superalloys, such as Haynes 282 alloy. Based on the model predictions, suggestions are made for developing new heat treatments to tune the CTE of Ni-based superalloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Copper / Nickel / Cobalt |