Evolution of structure of AlCoCrFeNi high-entropy alloy on irradiation by pulsed electron beam

By the methods of modern physical materials science the change in structural-phase state of AlCoCrFeNi high-entropy alloy (HEA) of nonequiatomic composition obtained by the methods of wire arc additive technology (WAAM) after irradiation by electron beams with energy density of (10 – 30) J/cm$^2$, durality of 50 $\mu$s, frequency 0.3 Hz is studied. In the initial state the alloy had a dendritic structure indicating the inhomogeneous distribution of elements. It is shown that electron beam processing forms the structure of high-velocity cellular crystallization with cell size of 100 – 200 nm, along boundaries of which the nanodimensional (15 – 30 nm) inclusions of the second phase enriched in Cr and Fe atoms are located.