4_2022_sen_6

Title of the article RADIATION RESISTANCE OF MULTILAYER NANOSTRUCTURED COATINGS nc-ZrN/a-ZrCu IRRADIATED WITH HELIUM IONS
Authors

UGLOV Vladimir V., D. Sc. in Phys. and Math., Prof., Head of the Department of Solid State Physics, Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ZLOTSKI Sergey V., Ph. D. in Phys. and Math., Senior Researcher of the Department of Solid State Physics, Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ZHORNIK Viktor I., D. Sc. in Eng., Prof., Head of the Department of Technologies of Mechanical Engineering and Metallurgy – Head of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VEREMEY Ilya S., Technician of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SOLODUKHIN Igor A., Ph. D. in Phys. and Math., Assoc. Prof., Associate Professor of the Department of Solid State Physics, Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING MATERIALS AND TECHNOLOGIES
Year 2022
Issue 4(61)
Pages 53–60
Type of article RAR
Index UDK 544.022.51
DOI https://doi.org/10.46864/1995-0470-2022-4-61-53-60
Abstract The paper presents the results of surface radiation erosion and stress evolution of multilayer coatings made of ZrN ceramic layers and metallic glass (Zr-Cu) under He2+ ion irradiation with an energy of 40 keV and fluences from 5·1016 to 1.1·1018 cm−2. Multilayer coatings of nc-ZrN/a-Zr1−хCuх with an elementary layer thickness of 5 nm/5 nm and 5 nm/10 nm are formed by reactive magnetron sputtering with different copper Cu contents (x = 0.45; 0.53; 0.61 and 0.74). Sputtering took place from Zr and Cu targets at a substrate temperature T = 300 °C. The surface of the films remained stable up to a fluence of 5·1017 cm−2. It has been found that with an increase in the ion fluence, the radiation erosion of the surface develops according to the flecking mechanism. It has been established that an increase in the thickness of the amorphous layer and the copper content increase the resistance to irradiation (the critical fluence increases from 5·1017 cm−2 to 8·1017 cm−2). Irradiation with helium He ions leads to a decrease in the level of compressive stresses. Reducing the level of stresses in multilayer films is associated with the effects of changes in the microstructure of the layers (shape distortion) at a dose of 2·1017 cm−2 and radiation erosion at a dose of 8·1017 cm−2.
Keywords multilayer films, magnetron sputtering, helium ion irradiation, stresses, amorphous layers, flecking
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4_2022_sen_5

Title of the article DEVELOPMENT OF A MATHEMATICAL MODEL OF THE SYNTHESIS OF A POLYCRYSTALLINE SUPERHARD MATERIAL BASED ON CUBIC BORON NITRIDE FROM WURZITE BORON NITRIDE MODIFIED WITH ALUMINUM
Authors

SENYUT Vladimir T., Ph. D. in Eng., Leading Researcher of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

PARNITSKY Alexander M., Ph. D. in Eng., Senior Researcher of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ZHORNIK Viktor I., D. Sc. in Eng., Prof., Head of the Department of Technologies of Mechanical Engineering and Metallurgy – Head of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING MATERIALS AND TECHNOLOGIES
Year 2022
Issue 4(61)
Pages 46–52
Type of article RAR
Index UDK 621.762:621.921.34
DOI https://doi.org/10.46864/1995-0470-2022-4-61-46-52
Abstract A mathematical model is developed for the technological process of synthesis under conditions of high pressures P and temperatures T of a polycrystalline superhard material based on cubic boron nitride (cBN). The superhard material is obtained from a wurtzite boron nitride (wBN) powder modified with aluminum Al, which is the initiator of the wBN→cBN phase transformation process. As a result of modelling, the boundary parameters Р and Т of the superhard material synthesis and the required amount of aluminum addition are calculated. It has been established that the synthesis of a material with a hardness of 28–30 GPa and crack resistance in the range of 7–10 MPa·m1/2 is carried out in the pressure range of 5–7 GPa at temperatures of 2.100–2.250 °C, and the aluminum additive content should be 7.5–10.0 wt.%.
Keywords mathematical model, cubic boron nitride, wurzite boron nitride, modification, synthesis
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4_2022_sen_3

Title of the article COMPUTATIONAL AND EXPERIMENTAL STUDY OF DYNAMIC LOADING OF POWER UNIT OF A TRANSPORT VEHICLE
Authors

TARATORKIN Igor A., D. Sc. in Eng., Prof., Chief Researcher, Head of the Department of Mechanics of Transport Vehicles, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation; Professor of the Department of Tracked Vehicles and Applied Mechanics, Kurgan State University, Kurgan, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

DERZHANSKII Victor B., D. Sc. in Eng., Prof., Leading Researcher, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation; Head of the Department of Tracked Vehicles and Applied Mechanics, Kurgan State University, Kurgan, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

TARATORKIN Alexander I., Ph. D. in Eng., Researcher, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VOLKOV Alexander A., Ph. D. in Eng., Software Eingineer, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation; Associate Professor of the Department of Tracked Vehicles and Applied Mechanics, Kurgan State University, Kurgan, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2022
Issue 4(61)
Pages 28–37
Type of article RAR
Index UDK 629.1.04
DOI https://doi.org/10.46864/1995-0470-2022-4-61-28-37
Abstract The article presents the results of a computational and experimental study of the dynamic loading of the transmission of a transport vehicle with an increased power diesel engine. The novelty of the study is substantiated in the scientifically based applicability of elastic torsion shafts between the engine and transmission as a torsional vibration damper, as well as in the development of a new experimental definition of the dynamic value of torque based on the principle of modulation of high-frequency oscillations of the signal of standard pulse speed sensors by modulating vibrations occurring in the power unit of the transport vehicle. As a result, the main calculated motor-frequency function of acceleration (torque) is obtained, including engine harmonics, harmonic components formed by the mechanisms of the connecting rod-piston and gas distribution mechanisms of the engine, the generator drive, vibrations in the transmission, etc. It is established that the reason for the limitation of the durability of torsion shafts is their operation in off-design modes due to the occurrence of a phenomenon called “task conflict”. On the basis of probabilistic calculations, a high comparative assessment of the probability of sudden fracture of elastic shafts at design and off-design loading modes is carried out. Based on the research results, a conclusion is made on the applicability of torsion shafts as dampers of torsional vibrations in the power unit with increased power.
Keywords dynamic loading, power unit, tracked vehicle, off-design mode, task conflict, modulation
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4_2022_sen_4

Title of the article METHOD FOR SELECTING THE FUNCTIONING MODES OF THE CARRIAGE DRIVE OF PROBE EQUIPMENT DURING TRANSIENT PROCESSES PROVIDING MINIMIZATION OF PROBING CYCLE DURATION. PART 1. METHOD FOR STUDYING MECHANICAL OSCILLATIONS OF THE OBJECT STAGE DRIVE
Authors

KOZINETS Alexei V., Engineer, Planar JSC, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BASINIUK Vladimir L., D. Sc. in Eng., Prof., Chief of the R&D Center “Mechanical Engineering Technologies and Processing Equipment” – Head of the Laboratory of Gearing Systems and Processing Equipment, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VOLKOTRUB Rita E., Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2022
Issue 4(61)
Pages 38–45
Type of article RAR
Index UDK 621.81
DOI https://doi.org/10.46864/1995-0470-2022-4-61-38-45
Abstract The article presents the results of the analysis of preliminary studies of mechanical vibrations with a natural frequency of the object stage of the probe equipment. They made it possible to establish that the duration of their attenuation, until the completion of which the crystals’ validity cannot be controlled, significantly depends on the mode of motion dynamics during acceleration and braking. At the same time their duration is up to ~87 % of time of the probing cycle and under certain modes of drive operation, it has a minimum that allows, without the use of active vibration damping systems, to reduce the duration of the vibration damping process by 25–36 % with a corresponding increase in the productivity of the probing process. It is shown that the range of variation of the step of the object stage displacement from the standpoint of its influence on the damping time of mechanical vibrations can conditionally be divided into two ranges: 1) displacement with a step of less than 2–3.5 mm, the most promising from the standpoint of a stably existing trend of minimizing the size of crystals, at which the damping time of oscillations is significant and depends nonlinearly on the value of this step, and 2) displacement with a step of more than 2–3.5 mm, for which the damping time of oscillations does not practically depend on the displacement step. Algorithm of further studies is proposed that makes it possible, after their implementation, to develop a method for choosing rational modes of operation of the probe equipment carriage drive during transient processes that ensure minimization of the duration of the probing cycle.
Keywords probe equipment, method, microelectronics, transient processes, performance
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4_2022_sen_2

Title of the article ASSESSMENT OF AGROTECHNICAL AND ENERGY INDICATORS OF THE PLOWING UNIT FUNCTIONING UNDER VARIOUS METHODS OF THE POSITION CONTROL OF THE WORKING BODIES
Authors

BELCHIK Leanid D., Ph. D. in Eng., Leading Researcher of the R&D Center “Onboard Control Systems of Mobile Machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ANANCHIKOV Anton A., Ph. D. in Eng., Head of the Department of Electrohydraulic Control Systems of the R&D Center “Onboard Control Systems of Mobile Machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ALEKSANDROVA Tatiana L., Senior Researcher of the R&D Center “Onboard Control Systems of Mobile Machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICS OF MOBILE MACHINES
Year 2022
Issue 4(61)
Pages 19–27
Type of article RAR
Index UDK 621.226
DOI https://doi.org/10.46864/1995-0470-2022-4-61-19-27
Abstract In order to comply with agrotechnical requirements and reduce fuel consumption when performing tillage operations, various methods of controlling the depth of plowing are used: position, draft, height and mixed. The choice of the method is carried out subjectively by the operator in the presence of appropriate technical means and visual assessment of the results of the work, therefore, substantiation of the rational controlling method is an urgent task. The results of theoretical studies of the process of controlling the depth of tillage by the working bodies of the plowing unit are given. Taking into account the elastic and damping properties of tires, the parameters of power wiring, as well as the compressibility of the working fluid in the nodes of the hydraulic system and the pliability of pipelines, a mathematical description of the process of functioning of the plowing unit equipped with an electrohydraulic drive of the attachment is compiled. Using mathematical modelling with force and kinematic disturbances from the soil, comparative statistical estimates are obtained on the accuracy of the tillage depth and energy consumption for the control process with various methods of regulation. Based on the numerical implementations of the model for the given conditions of the agrophone, a rational method of regulation is determined which satisfies the specified requirements. It is noted that with the altitude-force method of control, the smallest deviation of the tillage depth from the specified one is achieved with a decrease in energy consumption in comparison with the power method by 1.2 times.
Keywords plowing unit, control methods, mathematical description, control accuracy, control process, energy consumption, hydraulic drive, working bodies
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