About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
C-9: Evaluation of Corrosion in Ni-Based Alloys in Molten Fluoride Salt |
| Author(s) |
Ryan Gordon, Will Ward, Kasturi Sasidhar, Ryan Thier, Adrien Couet, Jaimie Tiley, Soumya Nag, Rishi Pillai, Bruce Pint, Steve Zinkle, Kumar Sridharan |
| On-Site Speaker (Planned) |
Ryan Gordon |
| Abstract Scope |
Hastelloy N was developed for high corrosion resistance in molten fluoride salts in the Molten Salt Reactor Experiment at Oak Ridge National Laboratory in the 1960s. However, the alloy has inadequate mechanical properties at the temperatures being considered for present MSR designs. Multiple precipitation strengthened alloys designed for superior creep strength have been investigated for corrosion performance in molten fluoride salt with emphasis on carbide-phase strengthened alloys. The alloys were cast, homogenized, and annealed to achieve an equiaxed grain structure. The corrosion performance, as measured by weight change and depth of attack, of these alloys has been compared to that of Hastelloy N. Tests were performed in molten FLiNaK (46.5LiF -11.5NaF-42KF, mol %) salt at 700°C in pyrolytic boron nitride capsules. Corrosion mechanisms have been investigated with advanced microstructural characterization techniques including TKD, STEM, EPMA, and APT in concurrence with CALPHAD-based thermodynamic and kinetic modeling. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, High-Temperature Materials |