Study of the materials subjected to electric rolling

Abstract

Electric rolling (ER) is one of the ways in which the electromagnetic field and electric current can affect the deformation zone of metallic materials (powder, composite and compact). The results of studying the structure and properties of ER materials: compact metals (copper, aluminum and titanium), powder materials of the system Fe - Cr - Ni, powder compositions containing the particles of boron nitride, glass and graphite (fillers) with a metal matrix of nickel and nichrome are presented. The capabilities of ER with imposition of high density current 10⁸ - 10⁹ A/m² on the hot spot resulting in a significant improvement of the mechanical properties of the studied materials compared to conventional cold rolling are shown. Metallic materials made in the form of tapes were studied on a special installation for electric rolling. The method is based on imposing high-density current through a deformable material between the roll-electrodes at a temperature not exceeding the temperature of the recrystallization onset and assessing the contribution of the impact of high-density current and electrophysical parameters (heat capacity, density, electrical resistivity, and magnetic susceptibility) to an increase in the mechanical properties of materials upon electric rolling. The high density current is shown to increase in the strength of materials and expand the technological capabilities of rolling. New experimental and theoretical data of the study can be used in the developing the technology for producing metallic tape materials.