| Abstract Scope |
Chemically disordered concentrated solid-solution alloys, including high-entropy alloys (HEAs), have demonstrated good mechanical properties and promising irradiation resistance depending on their compositions. Recently, it has been shown that ordered precipitates introduced into the HEA matrix can improve the mechanical performance significantly, due to the formation of L12 phase that affects dislocation movement during deformation. Here we employ molecular dynamics simulations to study how these ordered phases can influence the evolution of irradiation damage during accumulated cascade conditions. We studied two systems, i.e. Ni-Fe and Ni-Al, with L12 ordered phases embedded into the disordered matrix. Our results show that the size and density and the ordered phase affect the irradiation damage states of the alloy, and the ordered phase can reduce defect diffusivity which is related to the specific defect energetics in these two systems. |