Interaction between the edge dislocation dipole pair and interfacial misfit dislocation network in Ni-based single crystal superalloys

•The edge dislocation dipole pairs are first characterized in Ni-based single crystal superalloys.•The interacting mechanism between the edge dislocation dipole pair and heterogeneous interfacial misfit dislocation network is clarified by molecular dynamics simulation.•A network of interfacial misfit dislocation can impede, accommodate and pile up edge dislocation dipoles in Ni matrix.•A theoretical model is proposed to depict the loading rate effect on a stimulating period of edge dislocation dipole pairs.