Materials physics and mechanics

RAR RUS 1-13 0000-0001-7563-5623 National Institute of Technology Kurukshetra Agarwal

Haryana, India

National Institute of Technology Kurukshetra Angra

Haryana, India

0000-0002-5648-6113 National Institute of Technology Kurukshetra Singh

Haryana, India

A review on the mechanical behaviour of aluminium matrix composites under high strain rate loading AMCs (aluminium matrix composites) are commonly utilized in various structural applications as they possess high strength, low weight, and improved wear resistance properties in comparison to monolithic aluminium alloys. The properties of AMCs generally improve by adding reinforcements. These reinforcements can be ceramics like Alumina, Silicon carbide, or inorganic materials like fly ash. It was noticed that AMCs behave differently with a change in strain rate. Additionally, failure mechanisms under dynamic loading settings are discovered to be distinct from those under quasistatic or low strain rate loading conditions. The wide applications of AMCs rely both on their low strain rate behaviour and high strain rate characteristics. The emphasis of this study is to review the dynamic behaviour of AMCs where the strain rate varies from 100-10,000 s-1. AMCs were discovered to be strain rate sensitive at increasing strain rates, where their strength and failure strain increases with the strain rate. 10.18149/MPM.5162023_1 aluminium matrix composites; metal matrix composites; high strain rate; dynamic behaviour; mechanical properties https://mpm.spbstu.ru/article/2023.98.1/ 1-S_-Agarwal%2C-et-al-.pdf

RAR RUS 14-23 National Institute of Technology Kurukshetra Kumar

Haryana, India

0000-0002-5648-6113 National Institute of Technology Kurukshetra Singh

Haryana, India

National Institute of Technology Kurukshetra Angra

Haryana, India

Qualitative and quantitative interdependence of physical and mechanical properties of stir-casted hybrid aluminum composites Aluminum alloys are lightweight, castable, machinable, and have good mechanical and physical properties. Aluminum alloys are used in aerospace, automotive, defense, and structural sectors because of their promising qualities. This work examined how stirring speed, preheating temperature, and particle size affect the mechanical characteristics of stir-cast hybrid aluminum nanocomposites supplemented with GNPs and CeO2 at 0–3 wt. %. The microstructural investigation was done using SEM. EDAX confirmed components in nanocomposite samples. Increased reinforcing percentage improved physical and mechanical properties. The (3 % GNPs and 3 % CeO2) hybrid nanocomposites have 1.06 % porosity. The highest hardness, tensile strength, and yield strength were 104.3, 347.01, and 215.13 MPa. SEM micrographs indicated that hybrid composite samples had a more uniform distribution of reinforcements and defects-free morphology. 10.18149/MPM.5162023_2 Al-6061; nanocomposite; porosity; density; mechanical properties; microstructure https://mpm.spbstu.ru/article/2023.98.2/ 2-Dinesh-Kumar%2C-et-al.pdf

RAR RUS 24-41 BMS College of Engineering Ravikumar

Bengaluru, India

BMS College of Engineering R. Naik

Karnataka, India

BMS Institute of Technology and Management Vinod

Karnataka, India

BMS College of Engineering Chethana

Karnataka, India

BMS College of Engineering Rammohan

Karnataka, India

Study on nanosized Al2O3 and Al2O3-SiC on mechanical, wear and fracture surface of Al7075 composites for soil anchoring applications Mechanical and tribological tests of aluminium 7075 alloy, mono-composite (Al7075 + 1 % Al2O3), and hybrid composite (Al7075 + 1 % Al2O3 + 1 % SiC) have been performed in this study according to ASTM standards. Through the stir casting process, mono and hybrid composite materials were prepared. It was discovered that adding more hard ceramic particles improved hardness and strengthened tensile strength. In contrast to Al7075 alloy, hybrid MMCs enhanced tensile strength and superior hardness. The obtained results indicate that highest hardness of 78 VHN and tensile strength of 126 MPa were achieved for developed hybrid composites. A pin-on-disc wear test rig was used to conduct wear experiments. The Taguchi approach was used to optimise the wear parameters. The findings showed that the load had a greater impact on the wear behaviour of Al7075 alloys than did sliding distance and speed. The wear behaviour in mono composites and hybrid composites was improved by the addition of nano sized Al2O3 and SiC particulates to Al7075. Improved wear resistance for monolithic, mono and hybrid composites was achieved at 5 N of load, 100 rpm of speed and 250 m of sliding distance. Abrasion and adhesion-related damages were discovered by micrograph studies. Flows with the deep grooves were observed on the worn-out surface of mono composite. It provided the evidence of the mono composites' abrasive mechanism. Comparing the hybrid MMCs to the monolithic and mono composite MMCs it was seen that, the hybrid composites (Al7075 + 1 % Al2O3 + 1 % SiC) exhibited better wear resistance. 10.18149/MPM.5162023_3 Al7075; Al2O3/Al2O3-SiC; mechanical behavior; wear behavior; fracture analysis; Taguchi technique https://mpm.spbstu.ru/article/2023.98.3/ 3-M_-Ravikumar.pdf

RAR RUS 42-53 Bangladesh University of Engineering and Technology Kaiser

Dhaka, Bangladesh

Bangladesh University of Engineering and Technology Hossain

Dhaka, Bangladesh

On the precipitation behavior of Al-based automotive alloy with low Si content It investigates the function of Si content at lower level on the precipitation behaviour in terms of hardness, resistivity, impedance, X-ray diffraction analysis, differential scanning calorimetry along with structural transformation of Al-based automotive alloys. Conventional metal cast alloys are subsequently allowed to T6 thermal treatment at progression of homogenizing, solutionizing, quenching and ageing. Solution treated samples are aged naturally and artificially, including isochronal and isothermal for different time and temperature. The results suggest that the formation of clusters and GP zones together with metastable phases leads to considerable hardening in aged alloys. As a result, electrical resistivity also increases but decreases at higher ageing temperature for stress relieving followed by metastable phase dissolution and coarsening of fine precipitation. DSC and XRD study confirms the formation of such phases, showing the different peaks. The Si addition entirely changes the precipitation peak of the base alloy for its increasing properties of heterogeneous nucleation and diffusion kinetics in concert with the Si-rich intermetallic. Microstructural observations confirm that solution treatment improves grains distribution and Si additions creates the eutectic phases and coarsens the alloy grain boundaries. Both alloys as well attained more or less entirely re-crystallized after ageing at 350 °C for 60 minutes. 10.18149/MPM.5162023_4 Al-alloys; T6 heat treatment; intermetallic; resistivity; activation energy; microstructure https://mpm.spbstu.ru/article/2023.98.4/ 4-MS-Kaiser.pdf

RAR RUS 54-64 Peter the Great St. Petersburg Polytechnic University Zisman

St.Petersburg, Russia

National research centre “Kurchatov Institute” - Central Research Institute of Structural Materials “PROMETEY” Petrov

St.Petersburg, Russia

0000-0002-0185-5452 Peter the Great St. Petersburg Polytechnic University Zolotorevsky

St.Petersburg, Russia

National research center "Kurchatov institute" - Central research institute of structural materials "Prometey" Yakovleva

St. Petersburg, Russia

Effect of industrial hot rolling mode on microstructure and properties of low carbon bainitic steel Slabs of low carbon bainitic steel have been subjected to various modes of fractional hot rolling at fixed conditions of the next direct quenching and tempering. To assess influence of such treatments, microstructures and textures of bainite are determined by EBSD on representative areas and then analyzed with allowance for the resulting mechanical properties. The obtained data reveal a specific effect of hot deformation as far as the tempering does not significantly change crystallographic constitution of the quenched steel. According to the bainite textures, all considered modes lead to deformed states of parent austenite; at the same time, dissimilar types of the transformation product have been detected. Specifically, the softer (granular) bainite appears at higher strains and lower temperatures of the finish rolling stage because the work hardening of austenite increases the transformation temperature. Conversely, the lath bainite providing the maximum steel strength corresponds to properly limited strains of austenite at high enough temperatures. 10.18149/MPM.5162023_5 bainitic steels; hot rolling; phase transformation; microstructure; strengthening https://mpm.spbstu.ru/article/2023.98.5/ 5-A_A_-Zisman-et-al.pdf

RAR RUS 65-75 Abdelhamid Ibn Badis University-Mostaganem Bouhamou

Mostaganem, Algeria

Abdelhamid Ibn Badis University-Mostaganem Abbassa

Mostaganem, Algeria

Abdelhamid Ibn Badis University-Mostaganem Abbes

Mostaganem, Algeria

Abdelhamid Ibn Badis University-Mostaganem Boukortt

Mostaganem, Algeria

Abdelhamid Ibn Badis University-Mostaganem Abbes

Mostaganem, Algeria

Abdelhamid Ibn Badis University-Mostaganem Benbedra

Mostaganem, Algeria

Electronic, magnetic properties and pressure-induced phase transition of new D019 Fe2MnSn Heusler alloy Using ab-initio calculations based on density functional theory (DFT) with the generalized gradient approximation (GGA), structural, electronic and magnetic properties of Fe2MnSn full Heusler alloy are calculated within the framework to describe the effect of hydrostatic stress. The total system energy optimization indicates that the ground state corresponds to the hexagonal (D019) structure in ferromagnetic (FM) state. The compound undergoes a structural stress-induced phase transitions under pressure of 7 GPa. The total magnetic moment at the optimized lattice parameters is found 7.19 µB, which does not follow the Slater-Pauling rule. The material tends to rapidly lose its spin polarization under 10 GPa hydrostatic stress. 10.18149/MPM.5162023_6 Full Heusler; electronic; magnetic; FP-LAPW calculations https://mpm.spbstu.ru/article/2023.98.6/ 6-I_-Bouhamou%2C-et-al-F.pdf

RAR RUS 76-83 N-7717-2016 7005519053 0000-0003-4116-4821 Institute of Problems of Mechanical Engineering RAS Kolesnikova Anna anna.kolesnikova.physics@gmail.com

St. Petersburg, Russia

Togliatti State University Dorogov Maksim

Togliatti, Russia

Peter the Great St. Petersburg Polytechnic University Krasnitckii S.A.

St.Petersburg, Russia

ITMO University Smirnov A.M.

St.Petersburg, Russia

F-1445-2014 7202768874 0000-0003-3738-408X ITMO University Romanov Alexey alexey.romanov@niuitmo.ru

St.Petersburg, Russia

Disclination models in the analysis of stored energy in icosahedral small particles A discrete disclination model that describes the stored energy in icosahedral small particles (ISPs) is proposed. The particle energy is defined as a superposition of the energies of six interacting wedge disclinations, each of which connects the opposite vertices of the icosahedron. Isotropic elasticity analytical solution is given for a spheroid with the volume being equal to that of the icosahedron. Distributed disclination model, also known as Marks-Ioffe model, is used for calculation of the stored in ISP energy. The influence of the Poisson's ratio on the stored in ISP energy is studied within both considered disclination models. 10.18149/MPM.5162023_7 disclination; icosahedral small particle; discrete disclination model; distributed disclination model https://mpm.spbstu.ru/article/2023.98.7/ 7_Kolesnikova%2C-et-al.pdf

RAR RUS 84-91 Altai State Technical University Poletaev Gennady M.

Barnaul, Russia

Altai State University Rakitin

Barnaul, Russia

Determination of the formation energy of edge, screw and twinning dislocations in fcc metals using the molecular dynamics A method is proposed for determining the energy of moving edge, screw, and twinning dislocations in fcc metals using molecular dynamics, which consists in constructing and analyzing the graph of the time dependence of the potential energy of the calculation area of the crystal through which the dislocation passes. Nickel, copper, silver, and austenite are considered as examples of fcc metals. The initiation of the formation and movement of a dislocation was carried out by simulating a shear at a constant rate from the end of the computational cell. It was found that the shear rate above about 40 m/s affects the energy of dislocation: with increasing rate, the energy of the dislocation increases. According to the data obtained, the energy of an edge dislocation is approximately one and a half times higher than the energy of a screw dislocation. The energy of a twinning dislocation is much less than the energy of edge and screw dislocations. The moving twinning dislocation in the model was obtained as a result of the splitting of a screw dislocation on the twin into two partial dislocations that slide along the twin after splitting. 10.18149/MPM.5162023_8 molecular dynamics; metal; dislocation; dislocation energy; twinning dislocation https://mpm.spbstu.ru/article/2023.98.8/ 8-Poletaev.pdf

RAR RUS 92-106 Motilal Nehru National Institute of Technology Allahabad Kumar

India

Motilal Nehru National Institute of Technology Allahabad Bharti

India

Motilal Nehru National Institute of Technology Allahabad Kumar

India

Motilal Nehru National Instutute of Technology Allahabad Kushwaha

Prayagraj, India

Motilal Nehru National Institute of Technology Allahabad Patel

Prayagraj, India

Nanomaterials coating for bio-implant applications: a re-analysis Bio-implants are inserted in the body to support the natural part of body either fractured or partially failed. Therefore, bio-implant should be compatible with the body; must not produce harmful effect to body tissues or organs. As body environment is corrosive in nature; the implant should have high corrosion resistance. Also, it should have high strength and low percentage elongation. Additionally, implant material must allow the growth of tissues so that high bonding between the implant and body tissue can be achieved. Based on all the above-mentioned requirements for being a good implant material, titanium, steel, cobalt-chromium alloys, etc. are most widely used as implants. To further enhance the mechanical and biological properties of implants, different types of coating and surface modifications are done. Coating thickness, type of coating, and coating deposition techniques significantly affects the properties of an implant. In the present work, effects of the above-mentioned parameters are studied on the mechanical and biological properties of the implants. It was observed that the biocompatibility and wettability of polymer coatings were relatively less in comparison to ceramic and composite coatings. On the other hand, ceramic coatings were highly biocompatible and wettability was also high. For metallic coating, biocompatibility was less because of high reactivity. But, metals (like Bi) that form protective oxide layer on the surface of implants exhibits very good biocompatibility and mechanical strength. 10.18149/MPM.5162023_9 biological properties; coating; Implant; mechanical properties https://mpm.spbstu.ru/article/2023.98.9/ 9-Kumar-Naveen%2C-et-al.pdf

RAR RUS 107-118 Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science Morozov

Perm, Russia

Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science Beliaev

Perm, Russia

Perm State University Scherban

Perm, Russia

Effect of curing temperature on surface and subsurface properties of polyurethane elastomer Polyurethane elastomers are a class of polymers with two-phase segmented structure. The study of their features at the microstructure level will make it possible to control both macroscopic physical and mechanical properties of polymers and functional properties of surfaces. Polyurethanes of the same formulation were synthesized in this work, varying the curing temperature from 30 to 90 °C. Atomic force microscopy, dynamic mechanical analysis, and wettability were used in the study. Stiff fibrillar supramolecular structures (elastic modulus 14-22 MPa), distributed in a softer matrix, are formed in the polymers. Phase inhomogeneities are hidden under the surface by a soft nanolayer of variable thickness. An increase in the curing temperature leads to an increase in the thickness of this layer, and the stiff structure transforms from homogeneous to a network of agglomerates. Wettability, free surface energy and macroscopic viscoelastic properties nonlinearly depend on the curing temperature, which is explained by the physical and mechanical properties of the stiff and soft phases. 10.18149/MPM.5162023_10 polyurethane; microstructure; atomic force microscopy; physical and mechanical properties https://mpm.spbstu.ru/article/2023.98.10/ 10-I_A_-Morozov%2C-A_Yu-Beliaev%2C-M_G_-Scherban.pdf

RAR RUS 119-126 I.N. Ulyanov Chuvash State University Egorov E.N.

Cheboksary, Russia

V.I. Chapaev Cheboksary Production Association Sandalov

Cheboksary, Russia

I.N. Ulyanov Chuvash State University Kol’tsov

Cheboksary, Russia

Study of the influence of dispersed fillers on properties of rubber for gaskets of rail fastening The effect of dispersed fillers (NDP-D-400 and NDP-230 diatomites, microquartz and magnesium hydrosilicate) on the rheometric, physical-mechanical, operational and dynamic (sound-absorbing) properties of rubber based on general and special purpose caoutchoucs used for the manufacture of rail fastening gaskets has been studied. The rubber mixture was prepared on laboratory rollers LB 320 160/160, and then vulcanized in a P-V-100-3RT-2-PCD press. For the rubber compound, the vulcanization characteristics were studied, and for the vulcanizates, the physical and mechanical properties, their changes after exposure to aggressive environments and dynamic performance. It has been established that dispersed fillers improve the technological properties of the rubber mixture, increase the physical and mechanical, dynamic performance and resistance of rubber to aggressive media. It is shown that vulcanizates containing diatomites NDP-230 and NDP-D-400 in an amount of 5.0 phr, are characterized by improved physical, mechanical, operational and dynamic properties. 10.18149/MPM.5162023_11 diatomites; caoutchoucs; rubber; rheometric; physical-mechanical; operational and dynamic properties https://mpm.spbstu.ru/article/2023.98.11/ 11-Egorov-E_N_-at-al.pdf

RAR RUS 127-134 Belarusian State University of Informatics and Radioelectronics Boiprav Olga V.

Minsk, Belarus

Belarusian State University of Informatics and Radioelectronics Bogush

Minsk, Belarus

Belarusian State University of Informatics and Radioelectronics Lynkou

Minsk, Belarus

Electromagnetic radiation reflection, transmission and absorption characteristics of microwave absorbers based on dilatant liquids and powdered activated wood charcoal The paper presents new microwave absorbers based on dilatant liquids and powdered activated wood (birch) charcoal. The patterns of changes of electromagnetic radiation reflection, transmission and absorption coefficients values in the frequency range 2.0–17.0 GHz of the indicated absorbers are described. In accordance with these patterns, electromagnetic radiation reflection coefficient values in the frequency range of 2.0–17.0 GHz of the absorbers based on a dilatant liquid containing water vary from –2.0 to –15.0 dB, and absorbers based on dilatant liquid containing magnesium chloride water solution or sodium chloride water solution – from –2.0 to –17.0 dB and from –2.0 to –10.0 dB, respectively. Electromagnetic radiation transmission coefficient values of the above absorbers vary respectively from –15.0 to –27.0 dB, from –15.0 to –28.0 dB, from –15.0 to –30.0 dB. Electromagnetic radiation absorption coefficient values of these absorbers achieve a value of 0.95. These absorbers are recommended for use in lining the walls of containers intended for storage and transportation of electronic devices sensitive to microwave interference. 10.18149/MPM.5162023_12 absorption coefficient; activated wood charcoal; dilatant liquid; magnesium chloride; microwave absorber; reflection coefficient; sodium chloride; transmission coefficient https://mpm.spbstu.ru/article/2023.98.12/ 12-Boiprav%2C-Bogush%2C-Lynkou.pdf

RAR RUS 135-144 Ioffe Institute Butenko

St.Petersburg, Russia

Ioffe Institute Boiko

St.Petersburg, Russia

Ioffe Institute Chikiryaka

St.Petersburg, Russia

0000-0003-4205-3226 Ioffe Institute Guzilova L.I.

St.Petersburg, Russia

Ioffe Institute Pozdnyakov

St.Petersburg, Russia

Ioffe Institute Sharkov

St.Petersburg, Russia

Tomsk State University Almaev

Tomsk, Russia

Ioffe Institute Nikolaev

St.Petersburg, Russia

Tribological characteristics of bulk (-201) β-Ga2O3 substrate crystals grown by EFG The tribological and mechanical tests of bulk substate crystals of gallium oxide β-polymorph grown by the EFG technique were carried out. The correlation of coefficient of friction and wear coefficient with hardness is discussed. It is shown that the smooth, epi-ready surface of (-201) Ga2O3 samples has an extremely low resistance to abrasion by a sapphire ball. At the same time, the surface of the β-Ga2O3 wafer that has not undergone a complete post-growth processing cycle has high mechanical properties. It is pointed out that this difference can be due to deformation defects, which are entered into the subsurface layers during the mechanical impact on the semiconductor material. 10.18149/MPM.5162023_13 gallium oxide; EFG; wear; coefficient of friction; tribology; bulk crystals https://mpm.spbstu.ru/article/2023.98.13/ 13-Butenko%2C-et-al-(2).pdf

RAR RUS 145-151 AAU-9903-2020 7201550330 0000-0002-5934-8138 Peter the Great St. Petersburg Polytechnic University Belyaev Alexander belyaev_ak@spbstu.ru

St.Petersburg, Russia

Institute for Problems in Mechanical Engineering RAS Galyautdinova

St. Petersburg, Russia

Institute for Problems in Mechanical Engineering RAS Smirnov

St. Petersburg, Russia

Hydrogen diffusion in rotating cylindrical elastic bodies In this paper, we study the distribution of the hydrogen concentration in a rotating cylindrical elastic body compressed by two concentrated forces. This problem is relevant for diagnostics of bearing failure due to the influence of hydrogen on the mechanical properties of structures. During the study, the plane stress state of a loaded cylindrical elastic body is determined by means of the theory of functions of a complex variable. We used the transition to a rotating coordinate system to obtain the static problem of hydrogen diffusion in a body loaded by the known stresses. The solution of the problem includes the methods of asymptotic analysis for the simplification of partial differential equation, the expansion in a Fourier series and the Galerkin approach for finding the expansion coefficients for several harmonics. The results can be useful for calculating the hydrogen concentration distribution in roller bearings. 10.18149/MPM.5162023_14 hydrogen diffusion; hydrogen destruction; diffusion equation; stress state; rolling bearings https://mpm.spbstu.ru/article/2023.98.14/ 14-A_K_-Belyaev%2C-A_R_-Galyautdinova%2C-S_A_-Smirnov.pdf

RAR RUS 152-159 Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences Sedova

St. Petersburg, Russia

Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences Polyanskiy

St. Petersburg, Russia

AAU-9903-2020 7201550330 0000-0002-5934-8138 Peter the Great St. Petersburg Polytechnic University Belyaev Alexander belyaev_ak@spbstu.ru

St.Petersburg, Russia

Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences Yakovlev

St. Petersburg, Russia

Modeling the skin effect, associated with hydrogen charging of samples, within the framework of the HEDE mechanism of cracking The article is concerned with finite element solution of hydrogen-induced brittle fracture of a metal cylindrical specimen with a semicircular groove. The study is based on the HEDE model of hydrogen brittleness and considers the skin effect of charging the samples with hydrogen. The results showed that taking into account the skin effect leads to the changes in the mechanisms of destruction of samples, and it can be the true cause of the experimentally observed dual fracture pattern. 10.18149/MPM.5162023_15 cracking; decohesion; skin effect; hydrogen diffusion; dissolved hydrogen; destruction https://mpm.spbstu.ru/article/2023.98.15/ 15-Yu_S_-Sedova%2C-V_A_-Polyanskiy%2C-A_K_-Belyaev%2C-Yu_A_-Yakovlev.pdf