Tokaruk V. Increasing the wear resistance of D16 duralumin alloy by reinforcing the surface layer with a discrete electrospark coating

The thesis has solved the scientific and technical problem of increasing the tribotechnical and strength characteristics of aluminium alloys and expanding the load-speed range of their workable state by controlling the structure formation and mechanical characteristics at the reinforcement of the surface layers of aluminium alloys with wear-resistant electrospark coatings (ESC). It was proposed to form a discrete combined electrospark coating from VK8 alloy and copper with subsequent surface plastic deformation to increase hardness, wear resistance and expand the load range of the workable state of the reinforced surface using energy-saving D16 duralumin surface reinforcement technology. Empirical dependences of the intensity of wear of steel-duralumin D16 (reinforced/unreinforced ESC) tribosystem were obtained, taking into account anti-friction characteristics, the ability of the material to absorb the mechanical energy of deformation or destruction and the intensity of mechano-destructive processes in the surface layers of the metal at friction, which can be used to predict the effectiveness of the created wear-resistant coatings The practical value of the obtained results is realized in the developed complex of technologically experimental research methods the tribotechnical properties of materials with discrete combined electrospark coatings, which are designed to optimize the technological processes of applying coatings in the manufacture and strengthening of sliding friction pairs. Keywords: acoustic emission, duralumin, dissipative structures, discrete coating, electrospark alloying, wear intensity, friction coefficient, wear resistance, surface oil content, stress-strain state, surface-plastic deformation, average power of acoustic emission.