AbstractThe velocity x of grown‐in (1010) 〈1210〉 edge dislocations in the intermetallic compound MgZn2 has been measured as a function of stress τ at 390 °C. Dislocation displacements produced by compression pulses were detected by etch pitting (0001) surfaces. The fraction of mobile dislocations ϱm/ϱtot has also been determined as a function of stress. The results indicate that the velocity depends exponentially on τ−1. They are analyzed in terms of a modified kink model after Celli et al‥ Microscopic measurements are in good agreement with stationary creep data.