EFFECT OF INERT GAS IONS IRRADIATION ON RADIATION DAMAGE OF HIGH-ENTROPY ALLOY CrFe2MnNi AND 18Cr10NiTi STEEL

High-entropy alloys (HEAs) are of great interest as promising materials for use in nuclear reactors due to their exceptional mechanical properties, thermal stability, as well as corrosion and radiation resistance. In order to understand the effect of irradiation on the properties of HEAs and to demonstrate their potential advantages compared to conventional austenitic stainless steels, experiments on the irradiation of CrFe2MnNi HEA and 18Cr10NiTi steel (both with FCC lattice) with 20 keV He ions and 1.4 MeV Ar ions under identical conditions were conducted. Microstructure evolution of the irradiated materials and radiation-induced segregation of HEAs constituent elements were studied. It was found that the average size and density of cavities in 18Cr10NiTi steel are higher, and the swelling is almost twice as high compared to HEA.