| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Cr Migration in De-alloyed Ni-Cr Exposed to Molten FLiNaK via STEM-based Methods |
| Author(s) |
Sean H. Mills, Ho Lun Chan, Nathan Bieberdorf, Minsung Hong, Elena Romanovskaia, Laurent Capolungo, Mark Asta, John Scully, Peter Hosemann, Andrew Minor |
| On-Site Speaker (Planned) |
Sean H. Mills |
| Abstract Scope |
Structural materials used in nuclear reactor environments are exposed to coupled extremes such as irradiation, high temperature, and corrosion which act synergistically to degrade their performance. Connecting corrosion attack with alloy microstructure such as grain boundaries, pore morphology, and accumulating point defects is imperative to understanding underlying mechanisms. However, it is challenging to predict how varied alloying elements, salt species, and nanoscale point defects interact with one another leading to failure of materials, as the multiscale nature of these reactions is hidden. Here we implement scanning electron microscopy and transmission electron microscopy techniques to uncover the morphology and compositional variations associated with corrosion damage at different potentials at the micro and nano-scale in a model Ni-Cr alloy system exposed to fluoride molten salts. This study highlights the significance of chemistry and structure on isolated corrosion pore formation and the uniquely altered morphology that results from non-steady-state nuclear reactor environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Nuclear Materials |