Engineering Physics Annotation << Back The Effect of Electroexplosive Alloying and Electron Beam Action on the Surface Morphology and Roughness of the Al-15%Si Alloy Shliarova Yu.A., Shlyarov V.V., Zaguliaev D.V., Gromov V.E. The paper presents studies aimed at identifying the effect of complex modification on the structure and surface roughness of the hypereutectic silumin Al-15%Si. The complex treatment included coating the Y2 O3 system by electroexplosive doping followed by irradiation with a pulsed electron beam. Studies have been conducted on the patterns of changes in the relief (surface roughness (Ra) of the modifi ed layer. The formation of a multilayer multi-element multiphase structure has been revealed. The dependences of the properties of the modifi ed layer on the main parameters of electron beam irradiation are established: energy density, pulse duration, and number of pulses. The effective effect of complex processing has been established, which helps to increase the possibility of regulating the quality of the resulting surface. It is shown that complex treatment at an electron beam energy density of 35 J/cm2 (17 keV, 150 μs, 3 imp, 0.3 s–1) leads to a decrease in surface roughness (Ra) by 1.9 times, and the height of profi le irregularities (Rz) by 1.7 times relative to the level of roughness of silumin in the state after electroexplosive alloying. Keywords: electro-explosive alloying, electron beam treatment, Al-15%Si alloy, roughness, surface, structure. DOI: 10.25791/infi zik.3.2025.1467 Pp. 33-42.