https://www.elibrary.ru/title_about_new.asp?i 1605-8119 Materials physics and mechanics 51 1 2023 1-178
UNK RUS 1-9 Ioffe Institute Nikolaev
St.Petersburg, Russia
 National University of Science and Technology MISiS Polyakov
Moscow, Russia
 Ioffe Institute Stepanov
St.Petersburg, Russia
 Ioffe Institute Pechnikov
St.Petersburg, Russia
 0000-0003-4205-3226 Ioffe Institute Guzilova L.I.
St.Petersburg, Russia
 Ioffe Institute Scheglov
Saint Petersburg, Russia
 Ioffe Institute Chikiryaka
St.Petersburg, Russia
 Epitaxial stabilization of α-Ga2O3 layers grown on r-plane sapphire In this work, we study the thermal stabilization of metastable α-Ga2O3 in growth experiments. Gallium oxide films are grown on c- and r-plane sapphire substrates by halide vapor phase epitaxy (HVPE) at the temperature range of 450-690 oC.  The surface morphology is investigated by scanning electron microscopy.  The structural quality and phase composition of the grown films is studied by X-ray diffraction. It is found that the use of r-plane sapphire substrates prevents the formation of the orthorhombic κ-Ga2O3  and monoclinic β-Ga2O3  and thus extends the growth process window for the deposition of the  rhombohedral  α-phase of gallium oxide. 10.18149/MPM.5112023_1 gallium oxide HVPE epitaxial layers c-plane and r-plane sapphire substrates https://mpm.spbstu.ru/article/2023.93.1/ 1-Nikolaev-et-al.pdf
RAR RUS 10-18 Grozny State Oil Technical University Syzrantsev
Grozny, Russia
 Deformations properties of glassy epoxy doped with SiO2 and Al2O3 nanoparticles of different synthesis methods The variation in the deformation properties of epoxy polymers doped with of SiO2 and Al2O3 nanoparticles obtained by four different methods was experimentally investigated. It was shown that the doping of nanoparticles leads to structural changes in the polymer similar to the effect of plasticization (an increase in the mobility of the polymer chain). The variation of the types of nanoparticles contained in the composite significantly changes the process of the kinetics of microindentation stress relaxation. In particular, the complete recovery from microindentation (healing of the indentation) occurs at different concentrations by varying the method of nanoparticle synthesis. 10.18149/MPM.5112023_2 Microindentation thermally stimulated relaxation delocalization epoxy polymer nanoparticles https://mpm.spbstu.ru/article/2023.93.2/ 2-V_-Syzrantsev.pdf
RAR RUS 19-32 Aliah University Mohibul Khan
Kolkata, India
 Aliah University Md Shahbaz Alam
Kolkata, India
 Aliah University Sk. Faruque Ahmed
Kolkata, India
 Effect of nickel incorporation on structural and optical properties of zinc oxide thin films deposited by RF/DC sputtering technique Reactive co-sputtering technique has been used to fabricate pure zinc oxide and nickel doped zinc oxide thin films on glass substrate at room temperature 30º C. The actual target of this experimental work was to investigate the effect of nickel incorporation on structural and optical properties of nickel doped zinc oxide thin films. The deposited samples were characterized by using Energy-Dispersive Analysis X-ray, X-Ray Diffractometer, Atomic Force Microscope, Fourier Transform Infrared Spectroscopy and Ultraviolet-visible spectrophotometer to investigate the doping growth, structural crystallinity, surface morphology, chemical bonding information and optical properties. Scanning electron microscope has been used to measure the thickness of all deposited films. The X-Ray Diffractometer study of all deposited films reveals that the highly intensive peak has been found near glancing angle at 34.48º corresponds to miller indices (002), which confirmed the wurtzite hexagonal crystallite structure of zinc oxide that matched with JCPDS card no 36-1451. Crystallite size of deposited thin films is increased from 8 nm to 15 nm with the increasing of atomic % of nickel from 0 to 7.5 respectively in zinc oxide. The Fourier Transform Infrared Spectroscopy peak found at 432 cm-1 confirmed the deposited films are zinc oxide thin films. Optical band gap energy decreases from 3.15 eV to 2.21 eV where as the Urbach energy increases from 118meV to 243meVwith increasing of atomic % of nickel from 0 to 7.5 respectively. 10.18149/MPM.5112023_3 Ni-ZnO thin films; RF/DC sputtering technique; XRD; AFM; Optical Property; Urbach energy https://mpm.spbstu.ru/article/2023.93.3/ 3-Mohibul-Khan%2C-Md-Shahbaz-Alam%2C-Sk_-Faruque-Ahmed.pdf
RAR RUS 33-41 0000-0001-8407-8144 Ogarev Mordovia State University Erofeev
Saransk, The Republic of Mordovia, Russia
 National Research Mordovia State University Korotaev S.A.
Saransk, The Republic of Mordovia, Russia
 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin N.I.
St.Petersburg, Russia
 Deformation and Heat-Insulating Characteristics of Light Concrete on Porous Burned Binder Under Heating It is known to use heat-insulating materials with a rigid cellular structure on cement, gypsum, liquid glass binders as a constructive fire protection. The described technologies for the manufacture of such materials do not allow combining a binder with an aggregate. The use of frame technology made it possible to obtain a material with an aggregate on a porous burned soda-lime-silicate waterproof binder. The article presents the results of studies of the fire-proof  properties of samples from the obtained material. The deformation and heat-insulating characteristics of the material when heated are used as criteria for fire-proof  properties. Volumetric heating of the material to a maximum temperature of 892 °C was carried out when studying the deformation characteristics. The heat-insulating characteristics of the material were studied during one-sided heating of a material sample in the form of a tile to a maximum temperature of 1050 °C. The characteristics obtained indicate that the material can be used for fire-proof lining of building structures and as for the construction of screen walls and as a filling material in fire barriers. 10.18149/MPM.5112023_4 coarse aggregate liquid glass soda-lime-silicate glass burned binder fire-proof characteristics of the material https://mpm.spbstu.ru/article/2023.93.4/ 4-V_T_-Erofeev%2C-S_A_-Korotaev%2C-N_I_-Vatin.pdf
RAR RUS 42-60 Post Graduate Government College Baljeet Singh
Chandigarh, India
 Government College Asha Sangwan
Haryana, India
 Maharshi Dayanand University Jagdish Singh
Haryana, India
 Wave propagation in a nonlocal rotating micropolar piezoelectric solid The nonlocal theory of elasticity is applied to formulate the governing equations of nonlocal micropolar piezoelectric material in a rotating frame. The governing equations are specialized for a plane and solved to show the existence of three coupled plane waves. Reflection of a coupled longitudinal displacement wave is considered at a stress-free surface of half-space containing the micropolar piezoelectric material. For the incidence of coupled longitudinal displacement waves, the expressions of reflection coefficients and energy ratios for reflected waves are derived. A quantitative example is set up to illustrate the effects of rotation and nonlocal parameters on the reflection coefficients and energy ratios in a given range of the angle of incidence. 10.18149/MPM.5112023_5 plane waves nonlocality rotation reflection coefficients energy ratios https://mpm.spbstu.ru/article/2023.93.5/ 5-Baljeet-Singh%2C-Asha-Sangwan%2C-Jagdish-Singh.pdf
RAR RUS 61-67 Institute for Problems of Mechanical Engineering RAS Belyaev F.S.
St. Petersburg, Russia
 St. Petersburg State University Evard M.E.
St. Petersburg, Russia
 St. Petersburg State University Volkov A.E.
St. Petersburg, Russia
 Simulation of the plastic deformation of shape memory alloys considering shear anisotropy on the slip plane The plastic deformation of a TiNi single crystal was modeled, taking into account the anisotropy of the yield stress in the slip plane. The material parameters (initial yield stress and hardening factor) were selected for each slip system. Deformation curves were obtained for different orientations of the single crystal. It is shown that Schmid's law prevents obtaining a correct description of deformation for all orientations of single crystals. Good agreement with experiments was observed for the crystal orientations 〈001〉, 〈111〉, and 〈123〉 but not 〈011〉, for which the deformation mechanism was different. In the case of the deformation of a polycrystalline sample, the anisotropy in the slip plane is not significant. 10.18149/MPM.5112023_6 shape memory alloys microstructural modeling plastic deformation TiNi single crystal polycrystal https://mpm.spbstu.ru/article/2023.93.6/ 6-F_S_-Belyaev%2C-M_E_-Evard%2C-A_E_-Volkov.pdf
RAR RUS 68-83 Institute of Machinery and Metallurgy of the Far-Eastern Branch Russian Academy of Sciences Burenin
Komsomolsk-on-Amur, Russian Federation
 Institute of Automation and Control Processes Far Eastern Branch of the Russian Academy of Sciences Gerasimenko E.A.
Vladivostok, Russia
 Institute of Automation and Control Processes Far Eastern Branch of the Russian Academy of Sciences Kovtanyuk
Vladivostok, Russia
 On the unloading dynamics in an elastic/viscoplastic material predeformed by viscometric twisting Solving the problem of large elastic-plastic deformation theory, the present paper addresses, involved two stages. We first derive the exact solution to the problem of slow strain growth in a cylindrical layer consisting of an incompressible elastic/viscoplastic material and experiencing viscometric motion subject to no-slip contact between the material and the rigid instrument's walls. Then a striking stick-slip transition at one of the material-instrument interfaces poses the problem of unloading dynamics. Stress jump at the boundary surface causes a shear cylindrical unloading shock wave, which advances into the material and interacts with the elastic-plastic boundary separating viscoplastic flow from reversible deformation region. To solve this dynamic problem the ray method for constructing approximate solutions is adjusted to the case of elastic/viscoplastic material. 10.18149/MPM.5112023_7 large strains elasticity viscoplasticity viscometric strains unloading wave ray method https://mpm.spbstu.ru/article/2023.93.7/ 7-A_A_-Burenin%2C-E_A_-Gerasimenko%2C-L_V_-Kovtanyuk.pdf
RAR RUS 84-92 National University of Oil and Gas «Gubkin University» Elagina
Moscow, Russia
 Gubkin Russian State University of Oil and Gas (National Research University) Buklakov
Moscow, Russia
 Gubkin Russian State University of Oil and Gas (National Research University) Dubinov
Moscow, Russia
 Gubkin Russian State University of Oil and Gas (National Research University) Dedok
Moscow, Russia
 Gas-abrasive wear of shut-off valves and process piping of compressor and gas distribution stations A high content of mechanical impurities in the gas flow causes intense gas-abrasive wear of the pipe surface, especially at the pipe bends and shut-off valves. To assess the effect of gas flow rate on the failure rate of piping elements, an installation, and a test procedure were designed. The test result was evaluated by the value of the intensity of linear wear of the material, related to the amount of abrasive that was projected on the sample for the entire time of testing. Based on the results obtained, materials were identified that have minimal wear when the gas flow is shut off and when the abrasive carrying gas flow rate changes from 24 m/s to 48 m/s. Steel 20 showed better wear resistance compared to steel 09G2S, but an increase in the flow rate leads to an increase in wear intensity. 10.18149/MPM.5112023_8 gas-abrasive wear gas distribution station shut-off valves sealing materials of shutoff valves gas medium flow rate https://mpm.spbstu.ru/article/2023.93.8/ 8-O_Yu_-Elagina%2C-A_G_-Buklakov-et-al_F.pdf
RAR RUS 93-107 Alexandria University Fayik
Alexandria, Egypt
 Damanhur University El-Dhaba
Egypt
 0000-0002-3330-0822 Alexandria University Awad Emad
Alexandria, Egypt
 Diffusion-induced stresses due to an impulsive mass source under non-Fickian mass transfer models The description of the mass transfer mechanisms in various physical and engineering fields, e.g., Li-ion batteries, is of significant importance for optimizing their performance. The present work introduces a comparative study describing the different responses of a perfectly elastic material when different non-Fickian diffusion situations are considered. The uncoupled theory of elastic diffusion, in which the diffusion process is described by non-Fickian laws, such as Cattaneo, Jeffreys-type, and Burgers-type constitutive laws, is employed in this modeling. The diffusion of lithium ions inside the silicon anode is one of the physical situations in which diffusion-induced stresses may be significant. An impulsive initial value problem, consisting of an initial lithium ions amount that starts impulsively to diffuse over the entire space of a silicon material, is considered. Direct approach together with Laplace and exponential Fourier transforms techniques are employed to obtain the solution in the Laplace transformed domain. The inverse Laplace transform is computed numerically to obtain the solution in the physical domain. Comparisons among the material responses to different diffusion regimes are presented. 10.18149/MPM.5112023_9 Cattaneo equation Jeffreys equation linear elasticity lithium-ion batteries impulsive problem https://mpm.spbstu.ru/article/2023.93.9/ 9-M_-Fayik%2C-A_R_-El-Dhaba%2C-E_-Awad.pdf
RAR RUS 108-118 57209342766 0000-0001-8732-9615 Federal State-Financed Educational Institution of Higher Learning "Komsomolsk-na-Amure State University" Andrianov
Komsomolsk-on-Amur, Russia
 57208741522 0000-0001-8684-7541 Federal State-Financed Educational Institution of Higher Learning "Komsomolsk-na-Amure State University" Feoktistov
Komsomolsk-on-Amur, Russia
 Mechanical properties and deformation curves of the 3D-printed polycarbonate The aim of the study was to evaluate the mechanical characteristics of polycarbonate on the example of polycarbonate samples for 3D printing, to obtain the dependence of stress intensity on strain intensity taking into account compressibility. An experimental study of the mechanical properties of polycarbonate used in 3D printing has been carried out. Polycarbonate samples were made to perform tensile tests on a 3D printer. A series of stretching experiments were carried out in the elastic stage of samples to determine the Poisson's ratio of polycarbonate. To calculate the tensile strength, the conditional yield strength, polycarbonate samples were tested for rupture. Diagrams of conditional stresses from relative deformations are constructed. Since polycarbonate for 3D printing mainly works in the elasticity stage, the study constructed diagrams of polycarbonate deformation taking into account the compressibility of the material. According to the results of the study, the average values of the tensile elastic limit, the conditional yield strength, the tensile strength and the relative deformation at rupture of samples made by the 3d- printing method of polycarbonate were obtained. Deformations curves will allow us to estimate the stress-strain state of loaded polycarbonate elements not only under simple tension, but also under conditions of complex volumetric loading, since they relate the intensity of stresses and deformations. 10.18149/MPM.5112023_10 polycarbonate deformation curve 3D printing stress strain compressibility https://mpm.spbstu.ru/article/2023.93.10/ 10-I_K_-Andrianov%2C-S_I_-Feoktistov.pdf
RAR RUS 119-141 Sanjivani College of Engineering Wakchaure
Maharashtra, India
 Sanjivani College of Engineering Thakur
Maharashtra, India
 Mechanical and microstructural characteristics of underwater friction stir welded AA 6061-T6 joints using a hybrid GRA-artificial neural network approach In this paper hybrid grey relations analysis (GRA) and an artificial neural network (ANN) are applied to study the influence of process parameters on the mechanical properties of friction stir welded aluminum alloy 6061-T6. Thirty experiments were performed by varying tool rotation speed, tool traverse speed, and tool tilt angle to study their effects on ultimate tensile strength, yield strength, percentage elongation, and impact strength of FSW joints. GRA was used to convert all responses into the single response variable, i.e., the grey relation grade (GRG). A feed-forward backpropagation ANN with two hidden layers composed of 9 and 7 neurons each was used to simulate the weld joint characteristics in terms of GRG. ANOVA analysis was used to study the influence of process parameters on grey relation grade. It was found that tool rotation speed has a significant impact on weld characteristics, followed by traverse speed and tilt angle. Based on the results it was revealed that tool rotation speed contributes 39.89% to the mechanical properties of underwater friction stir welding of AA 6061-T6, followed by tool traverse speed and tool tilt angle, respectively, by 29.87% and 19.59%. The tensile test demonstrates that the underwater FSW joint is approximately 8% stronger than the conventional air FSW joint due to grain refinement and increased nugget zone hardness because of less heat exposure and absorption. 10.18149/MPM.5112023_11 microstructure underwater friction stir welding artificial neural network grey relation analysis ANOVA https://mpm.spbstu.ru/article/2023.93.11/ 11-Kiran-Wakchaure%2C-Ajaykumar-Thakur.pdf
RAR RUS 142-150 PSN College of Engineering and Technology Arunprasath
Tamilnadu, India
 PSR College of Engineering Amuthakkannan
India
 PSN College of Engineering and Technology Vijayakumar
Tamilnadu, India
 Institute of Agricultural Engineering, Saveetha school of Engineering Sundarakannan
Tamilnadu, India
 SSM Institute of Engineering and Technology Selwin M.
Tamilnadu, India
 Kalasalingam Academy of Research and Education Kavitha
Tamilnadu, India
 Sharda University Lavish Kumar Singh
Greater Noida, India
 Effect of Mechanical Properties of AL7075/Mica Powder Hybrid Metal Matrix Composite The applications of aluminum-based Metal Matrix Composite (MMC) are very huge and it possesses good output when combined with Mica Powder. Because Mica is one of the naturally available crafted stones of minerals. It can bind with the materials easily in ambient conditions. This research work is to study the mechanical performance of the AL7075/Mica Powder hybrid MMC's. The varying grams of Mica powder (5 g to 25 g) are added with 500 grams of aluminum 7075. From the results obtained for the mechanical properties of AL7075/Mica Powder composite. Specimen 5 (500 g of AL 7075/25 g of Mica Powder) has excellent mechanical properties such as tensile strength of about 285 MPa, impact strength of about 18 J. The Vicker Hardness indentation is about 80 VHN, all these results define that after the addition of Mica Powder in the composite. The bonding nature of Mica with AL7075 always acts as a supporting agent in the defining of excellent mechanical properties of metal matrix composite. 10.18149/MPM.5112023_12 AL7075 Mica Powder Tensile strength Impact strength Vicker's Hardness test SEM morphology https://mpm.spbstu.ru/article/2023.93.12/ 12-K_-Arunprasath-et-al.pdf
RAR RUS 151-167 Middle East Technical University Çalışkan
Ankara, Turkey
 Middle East Technical University Gürbüz
Ankara, Turkey
 Effect of compression precracking on near threshold region for AlSI 4340 steels considering compliance measurements Determining long crack threshold as a design criterion is not a new research topic; however, some anomalies because of different test methods in literature keep it voguish. Inaccurate estimations may result in considerable variation on corresponding endurance stress for components with small crack size. Accepted approach compared to traditional methods is to perform compression-compression precracking before crack growth tests by eliminating history effects and accurately estimating long crack threshold value. Load history effects may result from specimen configuration and test procedure applied. The scale of yielding during precracking cannot be underestimated and these residual stresses have an effect on crack growth rates, even if limited by stress relief in the plastic region. Naturally formed precrack will propagate until diminishing size of the corresponding tensile zone responsible for crack growth. Compression-compression precracking under constant amplitude loading is performed to form non-propagation crack. The advantage of compression precracking is to provide a fully open crack that eliminates possible closure effects. In the scope of this paper, different stress ratios will be tested and the effect of compression precracking on near threshold will be investigated. To present reliable and accurate crack measurement that affects long threshold directly, compliance curves will be also introduced with this article. 10.18149/MPM.5112023_13 Steel Fatigue Compliance Crack growth Threshold https://mpm.spbstu.ru/article/2023.93.13/ 13-SCaliskan.pdf
RAR RUS 168-178 Universidad Señor de Sipan Munoz Perez
Chiclayo, Perú
 Universidad Señor de Sipan Salazar Pretel
Chiclayo, Perú
 Universidad Cesar Vallejo Villena Zapata
Trujillo, Perú
 Mechanical properties of a soil improved with recycled demolition concrete for the construction of shallow foundations To achieve a satisfactory level of safety and stability in the construction of structures in weak soils, one of the best solutions may be soil improvement, the recycling and reuse of construction and demolition materials results in the preservation of natural resources and the reduction of environmental pollution. Therefore, this experimental study proposes to evaluate the mechanical properties of soil for surface foundations incorporating recycled demolition material. The mechanical behavior of a clayey soil improved with recycled concrete from demolition (CRD) was analyzed by means of a series of compaction tests, unconfined compression of soil specimens and direct shear in mixtures with 10 %, 15 %, 20 % and 25 % CRD by weight. As a result, the highest compressive strength of the soil is obtained with 16.67 % CRD according to UCS tests; and an improvement in cohesion and friction angle for all CRD percentages. Thus, it can be demonstrated that CRD has a positive influence on the mechanical properties of a soil with clayey characteristics. 10.18149/MPM.5112023_14 mechanical properties shallow foundations recycled demolition material soil improvement unconfined compression of soil specimens direct shear https://mpm.spbstu.ru/article/2023.93.14/ 14-Munoz-Perez-SP%2C-Salazar-Pretel-TM%2C-Villena-Zapata-LI.pdf