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

• Published in: Surface investigation, x-ray, synchrotron and neutron techniques x-ray, synchrotron and neutron techniques, 2023-04, Vol.17 (2), p.332-337
• Main Authors: Panova, T. V., Kovivchak, V. S.
• Format: Article
• Language: English
• Subjects: Alloying elements; Alloys; Aluminum; Aluminum base alloys; Chemistry and Materials Science; Coherent scattering; Compressive properties; Deformation effects; Dislocation density; Ion beams; Ion current density; Ion currents; Irradiation; Lattice parameters; Materials Science; Microhardness; Residual stress; Surface layers; Surfaces and Interfaces; Thin Films
• ISSN: 1027-4510; 1819-7094
• DOI: 10.1134/S1027451023020131

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 is studied. The data of elemental and phase analysis, residual stresses, sizes of coherent-scattering regions and dislocation density are 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 is found, which indicates the deforming effect of the resulting compressive residual stresses during irradiation with a high-power ion beam. Analysis of the sizes of the coherent-scattering regions in alloys compared with pure aluminum shows a tendency toward their decrease; in D16 alloy grinding occurs by a factor of 1.5, the dislocation density increases by a factor of two, and in V95T alloy, the dislocation density increases by a factor of 3. This trend indicates the significant influence of alloying elements on the dispersion and density of dislocations with varying irradiation parameters.