Факультет робототехніки та штучного інтелекту
Постійне посилання на фондhttps://repository.lntu.edu.ua/handle/123456789/3434
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Item type:Наукова стаття, Application of Carbide Cutting Inserts as Indenters for Surface Plastic Deformation(2023-03-15) Svirzhevskyi, Kostiantyn; Zabolotnyi, Oleg; Machado, José; Tkachuk, Anatolii; Boiarska, InnaSurface plastic deformation has a high productivity and allows for products with unique operational properties, namely: a high quality of the surface layer, increased support stability of the profile of the treated surface, a strengthened surface layer, and the formation of residual compressive stresses in the surface layer. The essence of smoothing is that a tool with regulated geometric characteristics of the deforming element (indenter) under specific technological processing modes penetrates the surface layer of the workpiece and slides, deforming the microgeometry formed as a result of previous technological operations. The article considers the option of using carbide-cutting plates as deforming elements. For this, a morphological table of methods of spatial orientation of the indenter-plate has been developed, which includes 27 possible options for its installation. The algorithm for calculating the geometry of the contact zone of the indenter and the workpiece is presented. The contact interaction of the indenter plate and the workpiece was studied. On the basis of morphological analysis and conducted applied studies, rational installation angles of the deforming element were determined. The interdependence of the properties of the surface layer on the technological modes of processing was defined.Item type:Наукова стаття, Formation of Coatings on Titanium Alloys Saturated with Biocomponents by the PEO Method(Cham: Springer, 2025-02-14) Povstyanoy, Oleksandr; Imbirovych, Nataliia; Boiarska, Inna; Nykoliuk, TamaraIn the work, the influence of the composition of the electrolyte on the elec-trophysical parameters of the synthesis of coatings with increased biocom-patible properties was studied. It was established that under conditions of increased electrolyte concentration, the voltage at which the coating is syn-thesized decreases. This effect can be explained by the thermodynamic Gibbs conditions. According to these conditions, the system needs more energy when the medium contains more elements, which must also con-sume a certain amount of energy. The authors found that sodium salts in-crease the conductivity of the working environment. This effect affects the speed of the synthesis process and can reduce the cost of the energy re-serve of the system as a whole. Spectral analysis established that during the synthesis of a titanium alloy in an alkaline electrolyte, an equilibrium non-degenerate quasi-ideal plasma is realized in the discharge channel with a temperature of (1...1,1)×104 K and an electron density of (3,2...3,4)×1022 m-3. It is under these conditions that molecules dissociate into ions and interact with the components of the elec-trolyte, which leads to oxidation of the surface of valve metals and the formation of stable compounds with high biocompatible properties.