Interstitialcy-based reordering kinetics of Ni3Al precipitates in irradiated Ni-based super alloys

Neutron irradiation tends to promote disorder in ordered alloys through the action of thermal spikes that it generates, while simultaneously introducing point defects and defect clusters. As they migrate, these will reordering alloys, acting against irradiation-induced disordering. In this study, classical molecular dynamics a highly parallel accelerated sampling method are used study kinetics Ni3Al under diffusion self-interstitial atoms (SIA). By monitoring order parameter potential energy from atomistic simulations, we show SIA acts as agent Ni3Al. A mean-field rate theory model interstitialcy-based is introduced, which reproduces simulation data predicts at temperatures low 500 K.