Hydrodynamic plastic flow in metal materials

Abstract

The band structures (microbands and shearbands) were first discovered and attracted attention of researchers in connection with plastic flow localization and absence of dislocations sliding signs during deformation. Experimental investigations of structure formations during plastic deformation conducted in subsequent 70 years did not make clear the nature of these bands. Nevertheless the study of structure formation in various metals and alloys at different means of deformation revealed the bands to arise in chaotic ensemble of dislocations after destruction of previous cell structure, to become on all zoom levels and to localize the deformation. Taking into account the plastic deformation to pass far from thermodynamic equilibrium we proposed the synergetic model of these structures formation in metallic crystals. It was revealed the band structures to secure the possibility of plastic deformation without dislocations by hydrodynamic plastic flow.

Keywords

• Hydrodynamic plastic flow
• Metal
• Self-organization
• Shear bands
• Micro bands
• Vacancy