Tensile properties and bend ductility of PCA after irradiation in HFIR

The objective of this work was to determine the effect of neutron irradiation on the tensile properties of prime candidate alloy (PCA) irradiated in several different initial microstructural conditions. Three different microstructures of PCA were irradiated in the High Flux Isotope Reactor (HFIR) at temperatures from 300 to 6000C to approximately 22 dpa and approximately 1750 at. ppm He. The B3 condition with coarse MC in the grain boundaries and cold-worked matrix resisted helium embrittlement better than the PCA-A1 (solution annealed) or PCA-A3 (25% cold worked). Disk bend ductility data were useful for screening, but correlation with tensile ductility was poor