Аннотация:This work is focused on theoretical investigation of dislocation nucleation processes occurred in the
course of shockwave and nanoindentation experiments. Molecular dynamics simulations have been applied to study the rate and mechanism of dislocation nucleation in aluminum with copper precipitates that form solid solutions or Guinier-Preston (GP) zones. The computation of the rate is based on the life-time evaluation ofthe metastable state. The nucleation speed as the function of stress and temperature has been approximated by Arrhenius equation depending on activation energy and volume. The activation parameters grow up with temperature and drop upon increasing of copper concentration in solutions and GP zones. Effect of copper precipitation on dislocation nucleation rate is discussed in wide range of shear stresses and temperatures.