AUTOWAVES OF LOCALIZED PLASTIC DEFORMATION ON THE YIELD PLATEAU AND ON THE WORK HARDENING STAGE
- 1 Institute of Strength Physics and Material Science Siberian Branch of Russian Academy of Sciences. Tomsk Polytechnic University, Tomsk, Russia
- 2 Institute of Strength Physics and Material Science Siberian Branch of Russian Academy of Sciences
- 3 Institute of Strength Physics and Material Science Siberian Branch of Russian Academy of Sciences. Tomsk State University, Tomsk, Russia
Abstract
A study was made of the macro-scale plastic flow non-homogeneities, which occur in metals in the form of Luders bands or Portevin-Le Chatelier effect. The motion kinetics was investigated for the mobile fronts of Luders bands observed for the yield plateau as well as localized plasticity fronts traveling in the course of serrated plastic flow behavior (Portevin-Le Chatelier effect). It is shown that the propagation of the above two kinds of band fronts can be regarded as macro-scale auto-wave processes of switching and excitation, respectively, which frequently occur in active media of different kinds.