Evolution of Structure in AlCoCrFeNi High-Entropy Alloy Irradiated by a Pulsed Electron Beam

High-current pulsed electron-beam (HCPEB) surface modification of Al-Co-Cr-Fe-Ni high-entropy alloy (wt. %) Al—15.64; Co—7.78; Cr—8.87; Fe—22.31; Ni—44.57, fabricated via wire-arc additive manufacturing was studied. The initial condition the sample is characterized by a highly inhomogeneous distribution chemical elements that form alloy. samples were irradiated with different electron beam energy densities 10, 20 and 30 J/cm2. structure then analyzed in relation to an deposition mode. study has established HCPEB induces high-speed crystallization cells varying size from 100 200 nm. There are nano-dimensional (15–30 nm) second-phase inclusions enriched atoms Cr Fe along grain boundaries. most liquating Al. Electron its homogenization. highlighted mode J/cm2, 50 µs, 3 pulses, 0.3 s−1 results formation layer homogenously distributed elements.