AGEING OF ALUMINUM ALLOY V95PCH IN A CONSTANT MAGNETIC FIELD

This paper presents the results of a comprehensive experimental study of the influence of a weak constant magnetic field on the aging process of aluminum alloy V95pch. Information is provided on the chemical composition of the aluminum alloy V95pch, modes of thermal and thermomagnetic processing and the main experimentally observed patterns of changes in the values of microhardness, elastic modulus of individual local regions, lattice parameter and fine structure parameters of the aluminum alloy V95pch, aged at a temperature of 140 °C, annealing time from 2 up to 8 hours, in a constant magnetic field of 557.0 kA/m and in its absence. It was found that a constant magnetic field significantly affects the strength properties and structure of the aluminum alloy V95pch, but does not change the stages of the aging process. The so-called “negative” magnetoplastic effect has been established, the value of which is 21%. There is a correlation between the results of measuring microhardness and the elastic modulus of the aluminum alloy V95pch. In addition, it is clear that when a constant magnetic field is applied, the average size of coherent scattering blocks becomes smaller, and the dislocation density and the value of relative microstrain are greater than in its absence, which indicates a distortion of the crystal lattice of the V95pch aluminum alloy. X-ray studies have shown that the time dependences of lattice parameters and fine structure parameters correlate with the time dependences of microhardness, which is consistent with the basic classical laws of the aging process. The results of this work can contribute to the creation of new and development of existing technologies for heat treatment of aluminum alloy V95pch and prediction of its physical and mechanical properties.

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