The self-excited wave nature of the instability and localisation of plastic deformation

The nature of the localisation of plastic flow observed during deformation of crystalline solids is discussed. The nucleation and evolution of the zones of strain localisation have been shown to reveal certain trends which could be described as autowaves of different kinds initiated by the processes of self-organization. Examples of self-excited wave processes, e.g., phase and excitement waves, that were observed experimentally by the deformation of mono- and polycrystalline metals and alloys are cited. Some of the numerical parameters of self-excited wave processes have been evaluated.