| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments III
|
| Presentation Title |
Predicting Internal Oxidation in High-Temperature Ni-Cr Alloys Using a CALPHAD-Informed Phase-Field Model |
| Author(s) |
Ziming Zhong, Peichen Wu, Kumar Ankit |
| On-Site Speaker (Planned) |
Kumar Ankit |
| Abstract Scope |
The morphological evolution of oxides in Ni-based alloys is influenced by complex interactions between multicomponent diffusion and heterogeneous reactions. Understanding this evolution is crucial for mitigating oxygen-induced degradation, especially as the transition from external to internal oxidation is strongly affected by these processes. However, studying these phenomena in high-temperature alloys presents challenges, as the impact of multicomponent diffusion along the phase and the grain boundaries on internal oxidation cannot be fully elucidated through experiments alone.
To overcome this issue, we present a CALPHAD-informed phase-field model for predicting the oxidation kinetics in Ni-Cr alloys during high-temperature oxidation. This model incorporates the influence of grain boundaries, initial microstructure, and operating conditions on the morphological evolution of chromium oxide particles. By comparing the model's predictions with experimental data, we aim to provide valuable insights into the complex mechanisms governing oxide evolution in Ni-based alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, High-Temperature Materials, Phase Transformations |