Physical Mesomechanics最新文献

{"title":"The Effect of Casting-Defined Phase Composition on the Structural Transformation and Electro-Mechanical Properties in Al-Fe Alloy after Severe Plastic Deformation","authors":"A. E. Medvedev,&nbsp;O. O. Zhukova,&nbsp;N. A. Enikeev,&nbsp;V. U. Kazykhanov,&nbsp;R. L. Narayan,&nbsp;M. Yu. Murashkin","doi":"10.1134/S1029959925600259","DOIUrl":"10.1134/S1029959925600259","url":null,"abstract":"<p>This paper studies the effect of the phase composition of cast Al-Fe alloy on its microstructure, properties and thermal stability after severe plastic deformation by high-pressure torsion (HPT). The aluminum alloy containing 1.7 wt. % Fe was produced by conventional casting (CC) and casting into electromagnetic mold (EMC), providing different phase composition, morphology and distribution in the initial state due to the different crystallization rate. In the CC alloy, the iron formed Al₁₃Fe₄ and Al₆Fe phases or particles, while in the EMC alloy, intermetallic particles have primarily Al₂Fe-alike composition. Such differences in size, distribution and composition of particles prior to HPT resulted in different levels of electro-mechanical properties in the deformed state. Both CC and EMC alloys demonstrate an increase in ultimate tensile strength (σ_UTS) and a decrease in electrical conductivity (EC) after HPT. The effects are more pronounced in the CC alloy, most likely due to the coarser particles. Annealing the samples after HPT at 230°C for 1h leads to a twofold decrease of the σ_UTS in the CC alloy and is accompanied by an increase in EC. At the same time, such heat treatment seemingly increased EC, decreased elongation to failure and had seemingly no effect on the σ_UTS of the EMC alloy. Overall, EMC alloy demonstrates higher thermal stability, most likely due to the presence and dispersion of the Al₂Fe intermetallic phase, which forms primarily due to the high cooling rate of the alloy, which is inherent in the EMC method.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"287 - 305"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Influence of the Structural-Phase State on Physical and Mechanical Characteristics of Fe-Mn Alloy","authors":"O. V. Rybalchenko,&nbsp;N. S. Martynenko,&nbsp;G. V. Rybalchenko,&nbsp;E. A. Lukyanova,&nbsp;P. D. Dolzhenko,&nbsp;I. V. Shchetinin,&nbsp;S. V. Konushkin,&nbsp;P. A. Prokofev,&nbsp;K. S. Kravchuk,&nbsp;A. G. Raab,&nbsp;A. N. Belyakov,&nbsp;S. V. Dobatkin","doi":"10.1134/S1029959925600065","DOIUrl":"10.1134/S1029959925600065","url":null,"abstract":"<p>The paper presents a study of various structural-phase states of the Fe-Mn-5Si alloy after severe plastic deformation by equal channel angular pressing and high-pressure torsion. Various physical and mechanical characteristics of the alloy were experimentally measured and analyzed in the austenitic coarse-grained, nanostructured grain-subgrain and twinned states, as well as in the predominantly martensitic and two-phase ultrafine-grained states. Indentation methods were used to find that severe plastic deformation increases the modulus of elasticity, the work of elastic deformation, and its elastic component, reducing the contact rigidity of the indenter with the deformed material and the work of plastic deformation. In this case, the alloy in the two-phase state after deformation has the lowest modulus of elasticity and work of plastic deformation at the highest work of elastic deformation.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"197 - 210"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calculating the Effective Mechanical Properties of Polymer Composites with Dispersed Particles Based on the Particle Size Distribution","authors":"M. Danilaev,&nbsp;S. Karandashov,&nbsp;V. Kuklin,&nbsp;I. Sidorov,&nbsp;A. Enskaya","doi":"10.1134/S1029959924602215","DOIUrl":"10.1134/S1029959924602215","url":null,"abstract":"<p>Development of adequate mathematic models of the mechanical properties of polymer composites with dispersed particles (PCDP) requires their verification. The following reasons complicate the verification of these mathematical models: lack of information on the mechanical properties of the transition layer at the boundary between the modified particle and the polymer; lack of information on the mechanical properties of the agglomerates that inevitably appear during the preparation of the PCDP. This study suggests a mathematical model for calculating effective mechanical properties (bulk modulus, shear modulus, Young’s modulus, and Poisson’s ratio) of the PCDP with encapsulated particles and verification of this model using PCDP samples with inclusions—nearly spherical dispersed aluminum oxide (Al₂O₃) particles that are not encapsulated and the particles encapsulated in a thin polymer shell. Equations for calculating the effective mechanical characteristics of these PCDPs are obtained. As demonstrated, the proposed model reliably provides the values of the bulk modulus, shear modulus, Young’s modulus and Poisson’s ratio of PCDPs with a small relative volume of dispersed submicron particles in the matrix.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"224 - 239"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a Reliable Numerical Model for a Process of Band Extrusion for Ceramic Roofing Tiles to Improve Durability of Forming Tools","authors":"M. Hawryluk,&nbsp;J. Marzec,&nbsp;L. Madej,&nbsp;K. Perzynski","doi":"10.1134/S1029959925600028","DOIUrl":"10.1134/S1029959925600028","url":null,"abstract":"<p>The specifics of the ceramic industry processes result in high pressures acting on the set of forming tools, leading to intense wear, which directly affects production costs and increases environmental impact. Therefore, the analysis of improving the efficiency of the technological stage of clay band extrusion in the production process of ceramic roofing tiles, using a combination of laboratory, industrial, and numerical studies, is the subject of this work. Extensive laboratory and industrial studies on the operational durability of clay band forming tools demonstrated that the dominant mechanism of destruction is tribological wear, particularly intense abrasive wear. The work also emphasizes the need to enhance the interpretation of research results through the use of computer-aided design techniques for technology development. As part of the research, a comprehensive numerical model was developed, incorporating the definition of a constitutive model based on the Drucker-Prager equation, a rheological model of the studied material, and initial and boundary conditions reflecting the specifics of the extrusion process. A key aspect was developing the rheological model in a tabular form and based on the Hansel-Spittel equation. The friction conditions based on specially designed laboratory tests were also determined. The identification of the flow stress model parameters was carried out using inverse analysis techniques. The reliability of the proposed material model, as well as the model for the entire technological stage, was verified by comparing the calculation results with measurement results. The obtained numerical simulation results preliminarily indicate the correctness of the conducted research, as both the shape of the extruded band and the preliminary results of stress distributions in the formed mass and on the tools are acceptably consistent with experimental observations. Such a numerical model for simulating band extrusion in the production process of ceramic roofing tiles will enable a comprehensive and more in-depth analysis of tool wear, especially over a longer operational period. However, further verification of the modeling results is necessary, followed by additional research aimed at fine-tuning the numerical model to fully reflect the specifics of the studied process. It should be emphasized that the developed numerical model represents one of the first approaches to addressing this type of issue concerning the process of clay band extrusion through forming tools.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"251 - 273"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retraction Note: Investigation of Thermal Impacts and Different Gradient Elasticity Theories on Wave Propagation through the Polymer Matrix Incorporated Carbon Nanotube Walls","authors":"K. Antar,&nbsp;Kh. Amara,&nbsp;A. Besseghier","doi":"10.1134/S1029959926020128","DOIUrl":"10.1134/S1029959926020128","url":null,"abstract":"","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"339 - 339"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interaction Features of Components during the Sintering of Powder Mixtures Ti-Al-(Fe-Fe2O3)","authors":"A. G. Knyazeva,&nbsp;E. N. Korosteleva,&nbsp;V. V. Korzhova","doi":"10.1134/S1029959924602136","DOIUrl":"10.1134/S1029959924602136","url":null,"abstract":"<p>The phase composition and microstructure of sintered powder materials based on multicomponent mixtures of Ti + Al + (Fe + Fe₂O₃), where one of the components is an oxidized steel swarf powder, has been studied. Two variants of the ratio of titanium and aluminum with the same volume content of swarf powder are considered. It was found that the presence of iron oxide in the initial swarf powder does not guarantee the formation of separate aluminum oxide phases. During vacuum sintering, both in the first version of the composition and in the second one, iron aluminides are mainly formed. The formation of ternary intermetallides TiFe₂Al and complex oxides FeTiO₃ was also observed.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"321 - 338"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multilevel Model Considering the Influence of Alloying Additions for Describing Superplasticity of Aluminum Alloys","authors":"E. R. Sharifullina,&nbsp;A. I. Shveykin,&nbsp;P. V. Trusov,&nbsp;A. A. Vshivkova","doi":"10.1134/S1029959925601150","DOIUrl":"10.1134/S1029959925601150","url":null,"abstract":"<p>Superplasticity is a promising technology aimed at manufacturing products of complex shapes with improved physical, mechanical and performance characteristics due to the fine-grained structure of materials. Deformation under superplastic conditions is characterized by lower loads on processing tools in comparison with conventional plastic working and by a reduction in the number of finishing operations. For many alloys prepared by methods of severe plastic deformation, experimental data on uniaxial tension in the range of relatively moderate temperatures and high strain rates, entering the superplasticity mode, staged (bell-shaped) stress-strain curves. This is associated with the action and interaction of various physical mechanisms and the change in their roles during deformation, as well as with the evolution of the defect structure in the material. These factors are influenced by temperature-strain rate conditions and by the structural characteristics of the material after preliminary processing, in particular, the shape and size of grains, the fraction of high-angle boundaries, the degree of recrystallization, and the presence of alloying additions that can form various phases in the material. The paper considers a modified statistical three-level constitutive model based on the crystal plasticity for describing superplastic deformation of an aluminum-magnesium alloy with an explicit consideration of crystallite boundaries and a change of their relative positions. The model takes into account the main deformation mechanisms: grain boundary sliding, intragranular dislocation sliding, and their interaction, as well as the processes of grain boundary diffusion, lattice rotations, and dynamic recrystallization. The paper introduces the model with a focus on a more detailed description of the influence of intermetallic particles on the material behavior. The results of numerical experiments for the aluminum-magnesium alloy 1565ch (Russian analogue of foreign alloy 5182), taking into account the particles of secondary phases, demonstrate satisfactory agreement with the experimental data.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"306 - 320"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Wire and Electron Beam Additive Manufacturing for Large-Sized Industrial Products","authors":"A. V. Chumaevskii,&nbsp;D. A. Gurianov,&nbsp;K. S. Osipovich,&nbsp;A. V. Filippov,&nbsp;S. V. Fortuna,&nbsp;N. N. Shamarin,&nbsp;V. M. Semenchuk,&nbsp;E. A. Sidorov,&nbsp;Yu. V. Kushnarev,&nbsp;A. A. Belosludtseva,&nbsp;V. E. Rubtsov,&nbsp;S. Yu. Tarasov,&nbsp;E. A. Kolubaev","doi":"10.1134/S102995992560123X","DOIUrl":"10.1134/S102995992560123X","url":null,"abstract":"<p>This paper focuses on studying the structure formation of large-scale nickel-based alloy and steel samples and compares them with previously obtained data on additive titanium, aluminum, copper, and other alloys. These studies demonstrate that the structural and phase state of nickel-based alloys and steels mainly depends on the alloy type and alloying elements. The longer existence of a melt pool and resulting partitioning of alloying elements for Inconel 625 alloys pose a significant printing challenge, while Inconel 718 alloys and high-alloy nickel-based high temperature alloys exhibit excellent mechanical properties. Furthermore, partitioning of alloying elements along dendrite boundaries can be unavoidable during heat treatment due to the formation of insoluble carbide particles. Printing austenitic stainless steels results in a structure represented by dendritic colonies, while ferrite-pearlite steels are characterized by the formation of a grain structure. Various types of steels and nickel-based alloys, as well as bimetallic components based on them, do not typically exhibit defects such as pores or cracks. A smooth transition zone from one material to another is formed in the structural gradient zone. The obtained data demonstrate that wire and feed electron beam additive manufacturing is one of the most suitable for the manufacture of parts from various types of steels and nickel-based alloys, including bimetallic components based on them.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 2","pages":"153 - 181"},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Study of Dynamic Yield Strength of Coarse-Grained and Fine-Grained M1 Copper Alloys Based on a New Approach to Anvil Impact Testing","authors":"R. V. Lukashov,&nbsp;A. A. Gruzdkov,&nbsp;G. A. Volkov,&nbsp;E. S. Ostropiko,&nbsp;N. A. Kazarinov,&nbsp;R. R. Valiev,&nbsp;Y. V. Petrov","doi":"10.1134/S1029959924601891","DOIUrl":"10.1134/S1029959924601891","url":null,"abstract":"<p>Coarse-grained and fine-grained M1 copper is experimentally investigated using a new methodology for processing the results of anvil impact tests. Dynamic test data are supplemented by yield strength measurements in static tests and microstructural studies before and after impact testing. Key parameters characterizing the material response to high-speed loading are evaluated within the incubation time approach, which provides new insights into the dynamic behavior of copper with different grain structures. Comparison is made between the results of classical Taylor tests and the data derived within the new approach, which allows the yield strength to be predicted under both impulse and high-speed loading. It is shown that coarse-grained or fine-grained specimens can exhibit higher strength depending on the loading rate.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 1","pages":"1 - 13"},"PeriodicalIF":2.0,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147341990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation of Zigzag Deformation Twins in Aluminum Nanowires","authors":"M. Yu. Gutkin,&nbsp;N. V. Skiba","doi":"10.1134/S1029959924602008","DOIUrl":"10.1134/S1029959924602008","url":null,"abstract":"<p>A theoretical model is proposed that describes the formation micromechanism of a zigzag-shaped deformation twinning structure in aluminum nanowires covered with an amorphous aluminum oxide layer. Within the framework of a two-dimensional model, this structure is formed by successive nucleation of twins in the aluminum nanolayer between the interfaces with the amorphous oxide films. In this case, the primary twin is formed at a stress concentrator near one of these interfaces, secondary twins nucleate in the stress concentration sites at the ends of the primary twin, and then this process repeats cyclically, i.e., new twins nucleate at the ends of the previous ones. Contour plots of von Mises shear stresses and elastic energy density of the primary twin are generated. Using these plots, the nucleation sites and growth directions of secondary twins are determined. According to the results of the model, the successive nucleation of deformation twins should lead to the formation of a zigzag twinning structure. It is concluded that the main reason for the formation of such a structure in aluminum nanowire is the presence of an oxide amorphous layer on its surface, which prevents the escape of the twins to the free surface of the nanowire, and as a result new stress concentration sites emerge in their locking points.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 1","pages":"83 - 92"},"PeriodicalIF":2.0,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147341826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}