About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Fundamental Science of Microstructural Evolution and Phase Transformations: An MPMD/FMD/SMD Symposium in Honor of Peter Voorhees
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| Presentation Title |
Understanding Dealloying and Coarsening of Ni-20Cr in a Molten Salt Environment through the Comparison of Phase-Field Simulations to 4-D Experiments |
| Author(s) |
W. Beck Andrews, Ellery Hendrix, Yuxiang Peng, Xiaoyang Liu, Yu-chen Karen Chen-Wiegart, Katsuyo Thornton |
| On-Site Speaker (Planned) |
W. Beck Andrews |
| Abstract Scope |
The combination of 4-D X-ray tomography experiments with phase-field modeling pioneered by Professor Voorhees constitutes an exceptionally interesting and useful approach to investigating microstructure evolution. In this work, we apply this approach to understand corrosion of Ni-Cr alloys in molten salt environments. We focused first on the coarsening of the nanoporous metal structure resulting from the dealloying of a Ni-20Cr microwire in MgCl2-KCl molten salt at 800° C. We performed phase-field simulations of coarsening via different dominant transport mechanisms to assess which one is present in the experimental system. Coarsening via surface diffusion provided the best agreement in evolution kinetics, but aspects of the morphological evolution indicated that the experimental system was more complex than assumed in our phase-field model. We are currently investigating the corrosion process itself with the goal of developing a holistic understanding of microstructure evolution in this system. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Characterization, Nuclear Materials |