Modification of the Properties of the Surface Layers of Aluminum Alloys under the Action of a High-Power Ion Beam

The effect of a high-power ion beam of nanosecond duration on the stress-strain state of the surface layer of aluminum and its alloys was studied. The data of elemental and phase analysis, residual stresses, sizes of coherent scattering regions and dislocation density were compared with the microhardness value for different irradiation regimes. A decrease in the lattice parameters of the α-phase of aluminum with an increase in the ion current density was found, which indicated the deforming effect of the resulting compressive residual stresses during irradiation with a high-power ion beam. The analysis of the sizes of the coherent scattering regions in alloys compared with pure aluminum showed a tendency to their decrease; in the D16 alloy the grinding occurred by a factor of 1.5, the dislocation density increased by a factor of two, and in the V95T alloy, the dislocation density increased by a factor of three. This trend indicates a significant influence of alloying elements on the dispersion and density of dislocations with varying irradiation parameters.