Chernov–Lüders bands and the Portevin–Le Chatelier effect as plastic flow instabilities

Аннотация

The development of macroscopic plastic flow heterogeneities in metals in the form of Chernov–Lüders bands and the Portevin–Le Chatelier effect is studied. The main laws of deformation development in these two cases are found, and the kinetics of the motion of Chernov–Lüders band fronts and the serrated deformation during the Portevin–Le Chatelier effect is investigated. It is shown that both versions of heterogeneities can be considered as macroscopic autowave processes of switching and excitation in deformable media.