CHANGES IN THE MECHANICAL CHARACTERISTICS OF COMMERCIALLY PURE ALUMINUM UNDER THE CONDITIONS OF MAGNETIC FIELD INFLUENCES

At present, the improvement of the physical parameters and special properties of the surfaces of materials is becoming increasingly important due to the multifaceted research problems associated with the introduction of high technologies into production processes. Since most structures and mechanisms operate under mechanical loads that lead to destruction, to analyze their service life, it is necessary to study the behavior of metals under external energy influences. In the work, the influence of weak magnetic fields up to 0.5 T on the deformation characteristics of aluminum for the possibility of plasticizing the material was studied. It has been established that exposure to constant magnetic fields leads to a reversible decrease in the microhardness of aluminum. The threshold value of the induction of a constant magnetic field (В = 0.1 T) was determined, above which it is possible to observe the effect of the influence of a constant magnetic field on the microhardness of aluminum. A further increase in the magnetic field leads to a linear increase in the effect. In the study of the creep rate of commercially pure aluminum, the dependence of the creep rate of aluminum, at the steady and accelerated stages, on the magnitude of the magnetic field induction was revealed. It has been investigated that the application of a magnetic field significantly changes the creep rate of aluminum. The effect of the induction of the magnetic field leads to a significant decrease in the creep rate compared to the sample that was destroyed without the action of the magnetic field. At the steady and logarithmic stages, the creep rate decreases regardless of the magnetic field induction. It was also found that the effect of the influence of the magnetic field is not unambiguous: there is both an increase in the creep rate, reaching a maximum value at B = 0.1 T, and its slowing down, reaching a minimum at B = 0.5 T. Thus, the dependence of the relative change in the creep rate of aluminum on the value of the magnetic field induction was revealed.

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