Models of dislocation glide and strengthening mechanisms in bcc complex concentrated alloys

Abstract The mechanical response of complex concentrated alloys (CCAs) deviates from that their pure and dilute counterparts due to the introduction a combinatorially sized chemical concentration dimension. Compositional fluctuations constantly alter energy landscape over which dislocations move, leading line roughness appearance defects such as kinks jogs under stress temperature conditions where they would ordinarily not exist in metals alloys. presence gives rise atomic-level mechanisms fundamentally change how CCAs deform plastically at meso- macroscales. In this article, we provide review recent advances modeling dislocation glide processes CCAs, including atomistic simulations using molecular dynamics, kinetic Monte Carlo edge screw motion refractory phase-field models evolution landscapes. We also discuss pathways develop comprehensive simulation methodologies connect an description compositional complexity with mesoscopic dislocation-mediated plastic eye toward improved design CCA superior response. Graphical abstract