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Control of Electrical Conductivity of Bimetal by Joint Plastic Deformation and Heat Treatment

It is shown that metals and alloy binary systems are widely used in technology due to the uniqueness of their mechanical, physical and chemical properties. Anisotropy of mechanical and electrical properties, which is due to cold plastic deformation, is not unimportant. Binary systems use is not limited to the mechanical engineering industry but also finds application in electrical engineering, automobile, aircraft, and rocket production. In this case, many parts are obtained by metal forming methods, which are characterized by ultimate plastic strain, heating, and hardening. Therefore, to predict the quality of products made of bimetallic compositions, it is necessary to be able to control the stress and deformation fields in the form alteration process. This is achieved by analyzing the component's initial mechanical properties, threshold deformation, anisotropy, hardness, and plasticity, and electrical conductivity. Based on this information, it is possible to find the system deformation regularities in which there is an inextricable layer connection. It is shown that as a result of the binary system deformation, the soft layer deformation becomes more difficult, and the hard layer deformation is facilitated, which leads to the convergence of the soft and hard layers deformation, and, consequently, to a decrease in the uneven bimetal deformation. This circumstance affects the electrical resistance of the bimetal and leads to anisotropy of electrical conductivity, which consequently contributes to an increase in heat losses due to eddy currents in electrical grids and devices.