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Information × Registration Number 0310U002036, 0109U000222 , R & D reports Title Effect of shock waves, electrical and magnetic fields on the structure and mechanical properties of the surface layer of metals popup.stage_title Розробка експериментальних методик обробки металевих матеріалів електричним вибухом провідника у рідині. Закономірності структурних перетворень в приповерхневих шарах металів під дією провідника, який вібухає Head Loskutov Stephan Vasiljevich, Доктор фізико-математичних наук Registration Date 28-01-2010 Organization Zaporizhzhia National Technical University popup.description2 Electrohydropulse processing of metals is the effect of the shock wave, which occurs as a result of high voltage electrical discharge in water of a metallic conductor at the surface layer of the material. The explosion of a metallic conductor is accompanied by a flow of nanoparticles, clusters of metal and oxide, which allows to modify the surface layer of samples. In case where high surface quality is not require, detail is used as a second electrode. If traces of individual electrohydraulic shocks are superimposed on each other, there is a continuous zone of work hardening, forms a smooth surface, widening the zone of hardening. The object of researches are the alloys of titan and iron. The purpose of researches is a receipt of experimental information for the construction of physical models of atomic-microscopic processes which take a place in a metal under the action of the impulsive loading, powerful impulses of the electric and magnetic fields. Methods of researches: X-ray analysis; differential thermal analysis; measuring of the work function of electrons (WFE) on the surface; trials on the kinetic macroindentation. Original experimental methods are developed: - a method of research of influencing of electrical discharge in water on the change of structure of metals; - a method of differential thermal analysis of metals; - a method of registration and measuring of hydrodynamic pressure on the wall of working chamber. Basic experimental results: 1. X-ray measurements of residual stresses have shown the changes in the structure of the material of the surface layer of investigated titanium alloys of VT3-1 brand: tensile stresses move seamlessly to the compressive. Relative changes of macrostresses after multiple electrohydropulse treatment compared with the initial state of the samples are of the approximately 20%. 2. Measurements of contact difference of potentials on the surface showed, that the power relief of surface of titanium alloys after multiple treatment was is characterized by a smooth and uniform distribution of WFE values, as compared to the initial state of samples; there is the diminishing of variation in the WFE values, that testifies to the increase of homogeneity of structure of superficial layer. 3. Trials on the kinetic indentation detected the changes in the mechanical characteristics of the titanium alloy after multiple treatment by shock waves. It was observed the correlation between the values of residual macrostresses and calculated mechanical properties of the material. EGIO is the localized type of the superficial consolidating and can be used for laborious surface details (grooves of GTE discs). Product Description popup.authors Золотаревський Іван Володимирович Кубишкін Анатолій Анатолійович Сейдаметов Станіслав Валерійович popup.nrat_date 2020-04-02 Close