Numerical simulation of the Portevin-Le Chatelier effect in annealed aluminum alloys

By taking into account of the precipitate kinetics and the dynamic strain aging mechanism, a phenomenological model with clear physical origin is established in this paper. Three types of serrated flow in the Portevin-Le Chatelier effect is reproduced by the numerical simulations of the uniaxial tensile tests with different applied strain rates. The computational results are found in good agreement with the experimental curves, which testifies the validity of the present model.