Improving the operating characteristics of aluminium by electroplastic deformation

The article presents the results of theoretical and experimental studies of electroplastic deformation by drawing (EPD) of electrical aluminum on an industrial multi-pass mill. The influence of a pulsed current with a density of ~ 10³ A/mm² and a duration of ~10^–4 s on the implementation of EPT in a deformation unit loaded above the yield limit, under conditions of excitation of the electronic subsystem of the metal, is considered, and the fundamental possibility of programmed control of deformation processes for modifying the physical and mechanical properties of technically important materials is shown. It was revealed that under conditions of electroplasticity, due to ponderomotive effects in the deformation zone, with the periodicity of current pulses at the front of their increase, ultrasonic vibration is created, causing additional mechanical stresses of the crystal lattice skeleton and actively influencing the kinetics of plastic deformation with improving the service characteristics of the material. The areas of technological application of EPV are drawing of ultra-fine, thin wire (up to ~ 1 mm in diameter), rolling of thin sheets, drawing and stamping of material. The installed technologies correspond to the most widespread production in the metalworking industry.

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