| Abstract Scope |
We present an integrated computational and experimental approach to understand the coupled effects of molten salt corrosion and irradiation on the performance of both traditional and additively manufactured (AM) 316H alloys in FLiNaK. Ion and proton irradiations were employed to emulate in-reactor irradiation effects. SEM imaging, combined with energy-dispersive X-ray spectroscopy (EDS) mapping, provided detailed microstructural and compositional insights, including localized cavity distribution and characterization of intergranular and intragranular Cr loss. A multiphysics model, coupling phase-field and rate-theory techniques, was introduced to simulate microstructure evolution under coupled irradiation and corrosion. It was shown that the corrosion rate is sensitive to the composition of Cr and Mo, the grain size and morphology, and temperature. A good agreement between the model predictions and experimental data was demonstrated |