The peculiarities of the superplasticity effect of the aluminium Al-Zn-Mg-Cu-Zr system alloy with two types of initial grain structure are considered. For the first type of structure, the large grains are predominant, and submicrocrystalline grains take up less volume. Another type of grain microstructure is that of large grains, rounded by small submicrocrystalline grains, which occupy a significantly larger relative volume. Samples with both types of microstructure exhibit superplastic properties, however, the range of flow stresses and strain rates in which the alloy samples are superplastic is much wider for a microstructure where submicrocrystalline grains predominate. For both types of microstructure, deformation processes are mainly localized in those volumes of samples where submicrocrystalline grains were concentrated. However, large grains change their shape during superplastic deformation. The reason for this may be the manifestation of the hydrodynamic flow during the process of deformation.

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The effect of relativistic electron beams on the change in the structure of the 2014 aluminum alloy was studied. The mechanical characteristics (hardness, ultimate strength, conditional yield stress) of the samples were measured before and after irradiation. The influence of phase changes on these mechanical characteristics was investigated. The possibility of cleaning the surface of alloy 2014 using electron beams was studied. The identification of phase inclusions in the aluminum alloy was carried out. The changes in the number of phases that occurred as a result of irradiation with relativistic electron beams were determined.