State Industrial University, Novokuznetsk, Russia:

D. V. Zagulyaev, Senior Lecturer
S. V. Konovalov, Assistant Professor, e-mail: konovserg@gmail.com
V. E. Gromov, Professor, Head of a Physics Chair
I. A. Sinyavskiy, Assistant Professor
V. Ya. Tsellermaer, Professor

The influence of weak magnetic field with induction 0.3 T on the microhardness of aluminum with different impurity contents of Fe and Si are experimentally investigated. The change of microhardness: without the influence of the magnetic field, immediately after exposure to the magnetic field, and after certain time intervals, while the exposure time was varied in a magnetic field are carry out. It is shown that the nature of the magnetic field is to reduce the microhardness, followed by a return to its original value. It is established that the effect of magnetic field on the microhardness of Al depends uniquely on the mass content of impurities The dependence of the relative change in the microhardness of the mass content of Fe and Si in the samples of Al, at the time of processing the magnetic field of 2 and 0.25 h. Set to the extreme nature of the dependence of the relative change in the microhardness of the aluminum content of Fe and Si at a 2 h treatment of the magnetic field. When reducing the exposure time dependence of the nature of the magnetic field varies. Studies of the effect of time of aging in a magnetic field on the microhardness of aluminum with different Fe content showed that the curves have the form of curves with saturation. The maximum effect of the magnetic field for different exposure time it is observed in samples with Al content of Fe 0.001 and 0.26%. It is suggested that the physical mechanism of the effect of magnetic field on the microhardness of the aluminum associated with the change in the state of the defect substructure, which consists in the fact that during plastic deformation is a continuous interaction of dislocations with each other and with point defects, resulting in repetitive chemical reactions in the process of plastic deformation. This leads to an increase dislocation mobility and, consequently, lower microhardness.

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