2_2026_sen_10

Title of the article DEFORMATION-OXIDATION ACTIVATION OF THE SURFACE LAYER OF CARBON STEEL TO ACCELERATE GAS NITROCARBURIZING
Authors

KONSTANTINOV Valerij M., D. Sc. in Eng., Prof., Head of the Department “Materials Science in Mechanical Engineering”, Belarusian National Technical University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

LESHOK Vladislav A., Assistant Lecturer of the Department “Materials Science in Mechanical Engineering”, Belarusian National Technical University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Year 2026
Issue 2(75)
Pages 87–96
Type of article RAR
Index UDK 621.785.533
DOI https://doi.org/10.46864/1995-0470-2026-2-75-87-96
Abstract The effect of deformation-oxidation activation of the surface layer on the kinetics of gas nitrocarburizing was investigated. It was found that preliminary plastic deformation of steel and surface oxidation lead to the acceleration of the gas nitrocarburizing. The dependences of the intensification degree on deformation level and oxidation temperature were studied. The optimal ranges of the deformation and oxidation temperature were determined. The predominant effect of intensification techniques at the stage of the chemical- thermal treatment was assessed. Reasons for the acceleration of gas nitrocarburizing are discussed.
Keywords plastic deformation, oxidation, activation, steel, nitrocarburizing, acceleration, chemicalthermal treatment, intensification
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2_2026_sen_9

Title of the article METHOD FOR CALCULATING STATIC TECHNOLOGICAL PARAMETERS OF AN ELECTROMAGNETIC DRIVE WITH A FERROMAGNETIC AUSTENITIC SHAPE-MEMORY CRYSTAL ACTUATOR WITH A SINGLE MARTENSITIC INTERLAYER
Authors

OSTRIKOV Vladislav O., M. Sc. in Eng., Ph. D. Student of the Department “Mechanical Engineering Technology, Automation and Robotics”, Sukhoi State Technical University of Gomel, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

OSTRIKOV Oleg M., D. Sc. in Eng., Ph. D. in Phys. and Math., Assoc., Prof. Head of the Department “Graphics”, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Year 2026
Issue 2(75)
Pages 80–86
Type of article RAR
Index UDK 539.4
DOI https://doi.org/10.46864/1995-0470-2026-2-75-80-86
Abstract The behavior of a ferromagnetic crystal acting as an actuating element with a shape memory effect in an electromagnetic drive is considered. The design of an electromagnetic measuring transducer with the shape-memory ferromagnetic crystal actuating element is described. A design feature is shown, which consists in combining magnetic and non-magnetic components for better passage of the magnetic field through the working element. The effect of a magnetic field on the occurrence of shear forces at the austenite/ martensite interfaces has been studied, which lead to deformation of a ferromagnetic crystal with a shape memory effect in a rigid enclosure. The purpose of solving the static problem was to find the force created by the sample as a result of the action of the magnetic field and driving the rod by changing the linear dimensions of the actuator. In the course of solving the static problem, systems of equilibrium of forces and moments for the martensitic layer, the first and second austenitic volumes are compiled. It is established that the problem is statically indefinable due to the discrepancy between the number of unknown quantities and the number of equations. To solve this problem, an assumption was made that represents the equality and parallelism of forces arising at the austenite/martensite interfaces as a result of the action of the magnetic field. Using the known parameters of the crystal lattice, it was possible to calculate the angle of rotation of the martensitic interlayer relative to the crystal surface, as well as the angle of rotation of the austenite/martensite interfaces and the height of the martensitic interlayer. Taking the known values of the forces occurring at the austenite/martensite interfaces and parallel to the applied magnetic field, it was determined that these forces are equal to the compensating forces providing static equilibrium and the magnitude of the force occurring at the end of the sample having a direct connection to the rod. A relationship has been found between the forces resulting from the action of the magnetic field at the austenite/martensite interfaces and shear forces directed parallel to the austenite/martensite interfaces.
Keywords electromagnetic drive, ferromagnetic crystal with shape memory, martensitic interlayer, interface
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2_2026_sen_7

Title of the article BENDING OF AN ELASTOPLASTIC FIVE-LAYER CIRCULAR PLATE SYMMETRIC IN THICKNESS
Authors

STAROVOITOV Eduard I., D. Sc. in Phys. and Math., Prof., Professor of the Department “Structural Mechanics, Geotechnical and Structural Engineering”, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

SALICKI Vladislav S., PhD Student, Belarusian State University of Transport, Gomel, Republic of Belarus,  This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICS OF DEFORMED SOLIDS
Year 2026
Issue 2(75)
Pages 62–70
Type of article RAR
Index UDK 539.3
DOI https://doi.org/10.46864/1995-0470-2026-2-75-62-70
Abstract The problem of bending of a five-layer circular plate symmetric in thickness by axisymmetric distributed load is considered. The central and outer layers are assumed to be load-bearing, thin, and of increased rigidity. They perceive the main part of the force load and can exhibit elastoplastic properties. Their deformation follows the Kirchhoff hypotheses. Two relatively thick nonlinearly elastic fillers are used to connect the load-bearing layers. They provide redistribution of forces between the layers and are used to protect against unwanted external influences such as temperature and radiation. The deformation of the fillers is described by Timoshenko hypotheses, which take into account the relative shift, the additional rotation of the normal to the middle surface of the layer. The system of differential equations of equilibrium for the considered plate is obtained using the variational method of Lagrange. It includes a system of two nonlinear differential equations. The sought-for functions are the deflection of the plate, the radial displacement of the midplane of the central supporting layer, and two relative shear displacements in the fillers. The Ilyushin method of elastic solutions is used to solve the corresponding boundary value problem. The general solution is obtained in a recursive form. Formulas are provided for calculating the sought-for displacements and relative shear displacements under the boundary conditions of rigid clamping of the plate contour. The convergence of the method and the dependence of the solution on the physical nonlinearity of the layer materials are numerically investigated.
Keywords five-layer circular plate, physical nonlinearity, bending, analytical solution, numerical results
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2_2026_sen_8

Title of the article ANALYSIS OF THE FEATURES OF THE STRESS-STRAIN STATE OF THE THIN SILICON WAFER DURING BLADE CUTTING PROCCES
Authors

MARMYSH Denis E., Ph. D. in Phys. and Math., Associate Professor of the Department of Theoretical and Applied Mechanics, Belarusian State University, Minsk, Republic of Belarus,  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.

TYCHINSKAYA Irina D., Researcher of the Laboratory of Gearing Systems and Processing Equipment of the R&D Center “Mechanical Engineering Technologies 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.
In the section MECHANICS OF DEFORMED SOLIDS
Year 2026
Issue 2(75)
Pages 71–79
Type of article RAR
Index UDK 539.3
DOI https://doi.org/10.46864/1995-0470-2026-2-75-71-79
Abstract The article presents the modeling of the stress-strain state (SSS) of a thin silicon wafer during high-speed blade cubic boron nitride cutting process. The mathematical model of the system SSS is formulated, as well as a model of contact interaction between the wafer and the cutter. The mechanical and mathematical model is solved using the finite element method in ANSYS Workbench software package. The distribution of stress fields in the area of contact interaction is analyzed for various values of the cut-off wafer allowance. Patterns have been established that relate the amount of allowance to the normal stresses that occur during processing. Their analysis showed that with a decrease in the cut-off allowance from 20 to 1.5 μm, normal stresses also decrease. This may be due to the fact that at relatively small cutting depths, the angle of inclination of the contact segment between the plate and the cutter to the x axis decreases and the influence of stresses σxx on the stress state also decreases, while at the same time the influence of stresses σyy increases. Data on the experimental processing of three silicon wafer samples with preset cutting modes are presented. The numerical variation of the values of the average roughness Ra for all samples varies in the range of 0.25–0.55 μm, the sample with the largest amount of allowance has the highest numerical value for all the characteristics presented. A logarithmic scale with superposition of average values according to the characteristics Ra, Rq, Rsk, Rku, mathematical reconstruction of the 3D relief according to the parameters Rsk, Rku and the ratio of nominal to total area are shown.
Keywords silicon wafer, cubic boron nitride, stress-strain state, SSS, blade processing, numerical simulation
  You can access full text version of the article.
Bibliography
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2_2026_sen_6

Title of the article DETERMINING THE STATIONARY MOTIONS OF A STATICALLY UNBALANCED ROTOR WITH A BALL SELF-BALANCING DEVICE BY A SMALL PARAMETER METHOD
Authors

SIDIKOV Mansur N., Ph. D. in Eng., Associate Professor of the Department “General Technical Disciplines”, Almalyk branch of NUST “MISIS”, Almalyk, Republic of Uzbekistan, This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING COMPONENTS
Year 2026
Issue 2(75)
Pages 52–61
Type of article RAR
Index UDK 531.01
DOI https://doi.org/10.46864/1995-0470-2026-2-75-52-61
Abstract The small parameter method was used to analyze the necessary conditions for stationary motions of a rotor mounted on a flexible shaft with a ball self-balancing device, when running tracks of the balancing balls are installed not only by eccentricity, but also have a horizontal axis of rotation. In this case, the parameter inversely proportional to the square of the angular velocity of the rotor is taken as the small parameter. In a particular case, an asymptotic solution is obtained taking into account the second power of the small parameter, as well as an exact solution to one of the cases of unbalanced rotor motion.
Keywords self-balancing device, eccentricity, running track, generalized coordinates
You can access full text version of the article.
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