| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Aging-Induced α' Precipitates in FeCrAl Alloys and Its Effects on Corrosion Behavior |
| Author(s) |
Rupesh Rajendran, Rajnikant V Umretiya, Andrew K Hoffman, Richard J Blair, Christopher Perlee, Raul B Rebak |
| On-Site Speaker (Planned) |
Rupesh Rajendran |
| Abstract Scope |
FeCrAl alloys are candidate materials for accident tolerant fuel (ATF) cladding applications in light water reactors (LWR) owing to their high resistance to hydrothermal corrosion, high temperature steam oxidation, fretting, and creep properties. Although these alloys were previously used in high temperature applications, Cr-rich α' phase can be precipitated at temperatures below the miscibility gap. The effect of volume fraction and morphology of α' phase on the material behavior of FeCrAl alloys is not clearly understood. In this work, we study the effects of aging temperature and duration of Fe-Cr-Al-Mo-based advanced powder metallurgy tube (APMT) specimens on the α' phase and its effect on electrochemical behavior in 3.5%NaCl environment. Preliminary results show an increase in α' phase increases the polarization resistance and reduces the corrosion rate, enhancing corrosion performance in chloride environments. Hydrothermal corrosion and high temperature steam oxidation results are found not to be affected by the α' phase. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Nuclear Materials, Environmental Effects |