Dmitry Trushnikov

20140304-07
Neural network based approach for quality improvement of electron beam welding
Elena Koleva, Nikolinka Christova, Georgi Mladenov, Dmitrii Trushnikov, Vladimir Belenkiy

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Neural network models for the dependence of the geometry characteristics of welds from 38Cr2Ni2Mo high-strength steel, obtained at electron beam welding in presence of longitudinal beam deflection oscillations, are estimated. ...  read more

20140506-14
Influence of Electron Beam’s Oscillations on Weld’s Structure Formation of Dissimilar Materials on an Example Steel with Bronze
Tatiana V. Olshanskaya, Gleb L. Permyakov, Vladimir Y. Belenkiy, Dmitriy N. Trushnikov

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The results of metallographic studies of dissimilar materials welds joint’s structure are presented. Welds were obtained from steel (12Х21Н5Т in Russian) and bronze (БрХ-06 in Russian), using EBW with the oscillation ...  read more

20140506-13
Model-Based Quality Optimization of EBW of steel
Elena Koleva, Dmitriy Trushnikov, Vladimir Belenkiy, Georgi Mladenov, Stefan Angelov, Dimitar Todorov

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Experimental results (four series of experiments) for EBW of two types of steel – high strength steel of 38Cr2Ni2Mo type and stainless steel are obtained and used for the estimation of models, describing the dependencies ...  read more

20140506-05
Simulation Evaporation Processes in Electron Beam Welding
Dmitriy N. Trushnikov, Ekaterina S. Salomatova, Aleksey I. Tsaplin, Vladimir Ya. Belenkiy

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In this paper the method of experimental estimation of the temperature in a keyhole in electron beam welding is described on the basis of chemical elements concentration in the vapors above welding zone. The temperature of ...  read more

20140506-04
Control of Electron Beam Welding of Plates, Using Current of the Back Plate Side
Elena G. Koleva, Dmitriy N. Trushnikov, Vladimir Ya. Belenkiy, Georgi M. Mladenov

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The conventional systems for control of throughout welds used beam current, that is passing through the crater in the liquid metal to the space on the back side of sample. In this paper a collector, situated not opposite the ...  read more

20140506-03
Ion Current, Collected from Plasma above the Welding Zone during Electron Beam Welding
Dmitriy N. Trushnikov, Georgi M. Mladenov, Vladimir Ya.Belenkiy, Elena G. Koleva

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Measurements of fluctuations of the ion current, collected by the plasma, generated during electron beam welding and treatment of the acquired data with modern digital methods are executed. Through the application of Coherent ...  read more

20140506-02
Numerical modeling of the plasma parameters, generated during electron beam welding
Dmitriy N. Trushnikov, Georgi M. Mladenov

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It is described a model of plasma formation in the crater in liquid metal as well as above electron beam welding zone. Model is based on solution of two equations for density of electrons and mean electron energy. The mass ...  read more

20160506-51
Fractal geometry in metallurgy of welding and coatings
Ekaterina A. Krivonosova, Ekaterina K. Krivonosova, Dmitry N. Trushnikov, Ilya S. Ponomarev

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Application of new methods for the description of structure of metals and alloys, the identification of new quantitative structure-morphology tours are especially important to establish the relationship “structure – ...  read more

20160506-17
Chemical composition of the weld formation at high concentrated energy source welding in vacuum
Ekaterina S. Salomatova, Dmitrii N. Trushnikov, Tatiana V. Olshanskaya, Vladimir Ya. Belenkiy

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Results of numerical modeling of formation of a final chemical composition at electron beam welding with oscillations and dynamic splitting of an electronic beam on three thermal sources are presented in this article. Verification ...  read more

20160506-14
EBW process control on the basis of solving the inverse problem of the keyhole form reconstruction
Dmitriy Trushnikov, Elena Krotova, Nikolay Musikhin

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The direct and inverse problems of keyhole shape reconstruction through the accompanying Xray bremsstrahlung were formulated. It was shown that the inverse problem of reconstruction of channel penetration is reduced to the ...  read more