| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Interaction Between Irradiation-Induced Heterogeneity and Corrosion Dealloying in Ni20Cr (wt.%) Alloy |
| Author(s) |
Sean H. Mills, Ho Lun Chan, Matthew Chancey, Benjamin Derby, Elena Romanovskaia, Nathan Bieberdorf, Harjot Singh, Valentin Romanovski, Mark Asta, Yongqiang Wang, Peter Hosemann, John Scully, Andrew Minor |
| On-Site Speaker (Planned) |
Sean H. Mills |
| Abstract Scope |
Structural materials in nuclear reactors degrade due to coupled extremes such as irradiation, high temperatures, and corrosion. Drawing the connection between corrosion and microstructure is imperative to understanding underlying mechanisms. However, predicting material degradation and failure is a challenge based on varied interactions among alloying elements, salt species, and nanoscale features from radiation damage. This study implements scanning electron microscopy and transmission electron microscopy techniques to examine the morphology and compositional changes in a model Ni20Cr (wt.%) alloy subjected to heavy Ni ion irradiation followed by LiF-NaF-KF (FLiNaK) molten salt corrosion. Micro and nano-scale heterogeneity within the unique as-irradiated microstructure is characterized and tracked in relation to changes in chemistry and microstructure associated with corrosion de-alloying. The findings from this work highlight the significance of chemistry and the unique irradiated microstructure in metal alloy degradation under corrosive nuclear reactor environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Phase Transformations, Environmental Effects |