Kinetics and statistics of jerky flow: experiments and computer simulations

The paper presents an overview of experimental and theoretical studies of the Portevin-Le Chatelier effect with regard to the statistics of stress discontinuities and spatio-temporal behaviour of strain localisations. It is shown that the statistics of stress drops changes progressively from peak-shaped to monotonie distributions when the strain rate or temperature are increased. A mesoscopic model accounting for strain inhomogeneity and …