Physical Mesomechanics最新文献

{"title":"High–Temperature Flow Stress Prediction of Ti–5Al–4Mo–6V–2Nb–1Fe Alloy by Phenomenological and Physically Based Constitutive Modeling","authors":"Bom Hae Ri,&nbsp;Song Il Jo,&nbsp;Kyong Ho Sim,&nbsp;Il Hyok Kim","doi":"10.1134/S1029959925601083","DOIUrl":"10.1134/S1029959925601083","url":null,"abstract":"<p>Phenomenological and physically based constitutive models were developed using true stress–true strain curves obtained through hot compressing test of Ti–5Al–4Mo–6V–2Nb–1Fe alloy. The experimental data acquired under the different temperatures (700, 800, 900, 1000 and 1100°C) and strain rates (0.001, 0.01, 0.1, 1 and 10 s^–1) conditions were modified considering friction. Based on the modified experimental data, the modified Johnson–Cook model, Arrhenius type model (phenomenological models) and the microstructure–based model (a physically based model) were developed to predict the hot flow stress of the alloy. And for each model, the average absolute relative error and determination coefficient were evaluated by comparing the experimental data to the predicted stress value. The determination coefficients were 0.9937, 0.9949 and 0.9956 for the modified Johnson–Cook model, Arrhenius type model and microstructure–based model, respectively. And the average absolute relative errors were respectively 6.71, 5.59 and 3.57%. Through the comparison of the developed constitutive material models, it is found that the microstructure–based constitutive model possessed the highest prediction accuracy.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 4","pages":"617 - 631"},"PeriodicalIF":2.2,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783018","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":"Effect of High–Temperature Annealing on the Structure and Properties of TiB/TiAl/Ti Layered Composite Material Obtained by Free SHS Compression","authors":"A. D. Bazhina,&nbsp;A. P. Chizhikov,&nbsp;M. S. Antipov,&nbsp;A. S. Ivanov,&nbsp;N. Yu. Khomenko,&nbsp;P. M. Bazhin","doi":"10.1134/S1029959925600636","DOIUrl":"10.1134/S1029959925600636","url":null,"abstract":"<p>In this work, a layered composite material was obtained by the method of free SHS compression, which combines the processes of self-propagating high-temperature synthesis and high-temperature shear deformation, using initial powder components of titanium, boron, and aluminum, as well as a VT1-0 titanium substrate. It is shown that the resulting composite consists of a TiB-based ceramic layer, a Ti-Al-based intermetallic layer, and an α-Ti titanium layer, with the interfaces between them having a wavy and diffuse character. The influence of high-temperature annealing in an oxidizing atmosphere at a temperature of 1000°C for 1 h on the structure, phase composition, and mechanical properties of each layer in the obtained composite was determined. The results of SEM, powder X-ray diffraction, and EDS analysis of the studied layered composite materials before and after annealing are presented. It was found that during annealing, the intermetallic layer, which initially consists primarily of the TiAl₃ phase, undergoes transformation into the main phases TiAl and Ti₃Al due to diffusion processes, while free titanium reacts with nitrogen to form up to 10 wt. % of the TiN nitride phase. It is shown that high-temperature annealing leads to structural and phase transformations in the studied layers, which result in improved mechanical properties: hardness increases up to 2.1 times, and the elastic modulus increases up to 1.7 times.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 4","pages":"713 - 724"},"PeriodicalIF":2.2,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783107","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":"Evaluating Hyperelastic and Alternative Deformation Models for Accurate Characterization of the Mechanical Properties of Biological Tissues","authors":"S. A. Muslov,&nbsp;A. I. Lotkov,&nbsp;P. Yu. Sukhochev","doi":"10.1134/S102995992560051X","DOIUrl":"10.1134/S102995992560051X","url":null,"abstract":"<p>Although hyperelastic models have been studied for almost 80 years, selecting one that accurately describes the mechanical response of materials remains a challenge. The most prominent examples of hyperelastic materials are biological tissues of living organisms. Information on models of hyperelastic biological materials is highly fragmented, typically focusing on specific individual models or particular organ tissues, and is published across various sources, with some applied aspects being insufficiently covered. This paper presents and analyzes the primary analytical formulations of the most common hyperelastic models (neo-Hookean, Mooney–Rivlin, Ogden, Polynomial, Yeoh, Veronda–Westmann) for calculating and analyzing the deformational behavior of materials. Consolidating essential information about these models in a single publication facilitates an informed choice of a model for computations and analysis of the deformation behavior of a hyperelastic material. Stress–strain curves, elastic modulus–strain curves, and statistical modeling parameters constructed based on the examined applied relationships are provided for the duodenum—the initial section of the human small intestine. Finally, formal approximating models: linear, bilinear, trilinear and exponential models of biological tissues are discussed as alternatives to hyperelastic models. The predictive capabilities of these standard analytical models are compared with those of their hyperelastic counterparts.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"461 - 474"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237289","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":"Enhanced Strength–Ductility Synergy of AA5182/Al2O3 Aluminum Matrix Composite Produced by Friction–Stir Processing","authors":"A. A. Kalinenko,&nbsp;S. S. Malopheyev,&nbsp;I. S. Zuiko,&nbsp;S. Yu. Mironov,&nbsp;R. O. Kaibyshev","doi":"10.1134/S1029959925600673","DOIUrl":"10.1134/S1029959925600673","url":null,"abstract":"<p>The AA5182/Al₂O₃ aluminum matrix composite with enhanced synergy of strength and ductility was produced by friction–stir processing. This was achieved using a comparatively low fraction (≈1 vol. %) of nanoscale Al₂O₃ reinforcing particles and applying 12 consecutive passes of friction stir processing. Electron backscatter diffraction was employed for characterization of grain structure, while transmission electron microscopy was applied for examination of dislocation structure and secondary particles. The superior strength of the produced composite was due to the combined influence of the reinforcing particles and grain refinement. On the other hand, the preservation of sufficient ductility was attributed to the relatively low fraction of the reinforcing Al₂O₃ phase and its uniform distribution within the processed material. Thus, the fabricated composite exhibited an optimized balance of strength and ductility.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"362 - 371"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237300","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":"Deformation Behavior of the AMg6 Alloy under the Influence of Pulsed Current of Different Duty Cycle","authors":"M. A. Pakhomov,&nbsp;H. Chen,&nbsp;Y. Li,&nbsp;V. V. Stolyarov","doi":"10.1134/S1029959925600107","DOIUrl":"10.1134/S1029959925600107","url":null,"abstract":"<p>The paper compares the deformation behavior under different tensile conditions (without current; accompanied by pulsed current of different density and duty cycle; when heated by an external source) of the structure and mechanical properties of coarse–grained AMg6 alloy. It is shown that a low duty cycle (<i>Q</i> = 10) of the pulsed current contributes to both an increase and a decrease in flow stresses, depending on the current density used, while a high duty cycle (<i>Q</i> = 20.000) has practically no effect on the deformation behavior. Reducing the current density and duty cycle to minimum values suppresses the Portevin – Le Chatelier effect and contributes to an increase in the strength and relative elongation of the alloy with a negligible thermal effect of the current. Tensioning with an external heat source to temperatures corresponding to the low duty cycle and increased current density pulse current mode results in maximum strength and relative elongation to failure. EBSD analysis showed that the pulsed current contributes to the preservation of a high proportion of large–angle grain boundaries and low dislocation density compared to tensile heating.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"451 - 460"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237343","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":"Effect of Phase Composition and Internal Structure Parameters on the Functional Properties of High–Temperature Heat–Protective Ceramic Composites MgO–MgAl2O4","authors":"A. S. Buyakov,&nbsp;E. V. Shilko,&nbsp;A. S. Grigoriev,&nbsp;V. V. Shmakov,&nbsp;A. S. Volobuev","doi":"10.1134/S1029959925600855","DOIUrl":"10.1134/S1029959925600855","url":null,"abstract":"<p>The paper presents the results of a study of the functional properties of high–temperature heat–protective ceramic materials based on a composition of MgO and MgAl₂O₄ in a wide range of component concentrations. It is shown that a decrease in the characteristic size of powder particles by two orders of magnitude and an increase in the quality of adhesion provide the achievement of extremely low thermal conductivity of sintered ceramics in combination with high strength and fracture toughness. By varying the volume fraction of components, it is possible to purposefully shift the balance of thermal conductivity, resistance to thermal shocks, and mechanical properties of heat–protective products in relation to specific operating conditions. Quantitative estimates of the effect of micro- and submicroscale discontinuities of the internal structure on the macroscopic functional characteristics of ceramic composites were obtained using computer modeling.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"341 - 361"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237247","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 Grain Size in Grade 4 Titanium on Surface Topography and Near–Surface Zone Microstructure Depending on Cutting Parameters","authors":"I. P. Semenova,&nbsp;L. R. Rezyapova,&nbsp;V. S. Danelian,&nbsp;V. F. Makarov,&nbsp;M. V. Pesin,&nbsp;L. V. Konogorova,&nbsp;A. V. Polyakov","doi":"10.1134/S1029959924602112","DOIUrl":"10.1134/S1029959924602112","url":null,"abstract":"<p>Due to their high stored internal energy, nanostructured materials can be susceptible to undesirable changes during turning/cutting machining, which is known to be a heat dissipation process and can negatively affect their unique properties. In this paper, ultrafine–grained Grade 4 titanium rods produced by equal–channel angular pressing–Conform are investigated. The results of experimental studies of the effect of the ultrafine–grained structure (grain size ~0.15 μm) formed in the rods on the roughness and microstructure of the near–surface deformed zone are presented as a function of the cutting parameters (cutting speed <i>V</i>, m/min; cutting depth <i>t</i>, mm; cutting feed <i>S</i>, mm / rev) in comparison with samples with coarse (~10 μm) grain. Differences in surface topography and chip morphology depending on the grain size of the machined titanium are discussed. The fundamental possibility of predicting the surface roughness of titanium alloys depending on grain size using artificial intelligence methods is demonstrated.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"421 - 434"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237288","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":"Physicochemical Principles of Alloying Intermetallic Alloys Based on γ-TiAl and Their Practical Implementation","authors":"V. M. Imayev,&nbsp;D. M. Trofimov,&nbsp;R. M. Imayev,&nbsp;R. R. Mulyukov","doi":"10.1134/S1029959925600387","DOIUrl":"10.1134/S1029959925600387","url":null,"abstract":"<p>Since 2012, intermetallic alloys based on the γ(TiAl) + α₂(Ti₃Al) phases have been used as a material for low–pressure turbine blades in gas turbine aircraft engines replacing conventional nickel–based superalloys. However, the use of these alloys remains limited. This is due not only to their inherent brittleness and low crack resistance, but also to insufficient creep and oxidation resistance at temperatures of 700–750°C and above. In the present work, novel physicochemical approaches to alloying intermetallic alloys based on γ(TiAl) + α₂(Ti₃Al) phases were proposed, followed by their practical implementation. According to the proposed approaches: i) the alloying elements should have high solubility in intermetallic phases; ii) it is preferable for the alloying elements to be refractory metals and have larger atomic radii than Ti and Al; iii) it is desirable that the alloying reduces the lattice misfits of the γ(TiAl) and α₂(Ti₃Al) phases; iv) it is preferable that the alloying does not lead to an increase in the content of the brittle α₂(Ti₃Al) phase and an increase in the tetragonal distortion of the γ(TiAl) phase; v) the difference in electronegativity of the alloying elements and the base elements (Ti and Al) should not be too significant. To achieve the goal, the alloys based on Ti–(43.5–44)Al (at. %) and alloyed with elements meeting the specified conditions were manufactured and subjected to the same hot working and heat treatment, which ensured obtaining similar microstructural conditions. This made it possible to elucidate the effect of alloying on mechanical properties and oxidation resistance of the alloys. Based on this, a new TNZ alloy with the composition Ti–(43.5–44.5)Al–6(Nb, Zr, Hf)–(0.1–0.15)B (at. %) was designed. It was demonstrated that the new alloy possessed enhanced creep and oxidation resistance in comparison with that of the engineering TNM alloy (Ti–43.5A–4Nb–1Mo–0.1B, at. %) without compromising ductility and hot workability.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"372 - 394"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237325","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":"Research of Corrosion Resistance of Titanium Nickelide Rods in Spinal Pedicle Screw Devices with Various Fixation Types","authors":"E. A. Lukina,&nbsp;E. V. Preobrazhenskii,&nbsp;D. E. Gusev","doi":"10.1134/S1029959925600211","DOIUrl":"10.1134/S1029959925600211","url":null,"abstract":"<p>In this work, the finite element method is used for numerical calculation of the stress and strain distribution on the surface of TiNi-based alloy spinal rods locked in pedicle screw constructs with various geometries of fastening elements, and an experimental study of their corrosion resistance is carried out using long–term immersion test into a 0.9% NaCl corrosion solution and fretting corrosion test by applying a cyclic load with a bending moment arising during functional movements in the lumbar spine. It has been revealed that the formation of local plastic deformation zones during initial locking and following cyclic loading, the surface area (<i>S</i>) and the maximum degree of deformation (ε_{plast (max)}) in which depend on the geometry of pedicle screw fastening elements, has a significant negative effect on the corrosion resistance of TiNi rods in the studied constructs. The corrosion damage of TiNi rods after long–term immersion test was revealed when using only one type of pedicle screws which causing the formation of plastic deformation zones on the rods surface at the initial stage of rods locking. It has been shown that the fretting corrosion current decreases from 5.8 ± 3 μA to 1.3 ± 0.4 μA, the area of corrosion damage decreases from 0.23 ± 0.04 to 0.015 ± 0.01 mm², and the content of Ni ions in the corrosive environment reduces by 2.9-fold when testing in screws with fastening elements leading to the formation of local plastic deformation zones with ε_{plast (max) (I)} = 62%; <i>S</i>_(I) = 7.7 mm² and ε_{plast (max) (II)} = 3.7%; <i>S</i>_(II) = 4.9 mm², respectively. It has been demonstrated that the application of the third type of pedicle screws with the fastening elements which do not lead to the formation of plastic deformation zones on TiNi rods surface at initial locking and during the subsequent application of cyclic load, completely prevents the development of the corrosion process, indicating the need to select the optimal geometry of the fastening elements to ensure high reliability and durability of medical implant constructs with components made of TiNi-based alloys.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"435 - 450"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237301","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":"Analysis of the Structural, Electronic, and Thermoelectric Properties of Lead–free Cs2AgBiX6 (X = Br, Cl) Double Perovskites for Non–Toxic Technologies","authors":"K. Bouferrache,&nbsp;M. A. Ghebouli,&nbsp;M. Fatmi,&nbsp;B. Ghebouli,&nbsp;S. Alomairy,&nbsp;Aref Omri","doi":"10.1134/S1029959925600648","DOIUrl":"10.1134/S1029959925600648","url":null,"abstract":"<p>The double perovskite compounds Cs₂AgBiX₆ (X = Br, Cl) are promising lead–free alternatives to conventional halide perovskites. In this study, we employ first–principles calculations based on Density Functional Theory within the WIEN2k framework to investigate their structural, electronic, optical, and thermoelectric properties. The structural properties were analyzed through geometry optimization and stability assessment to ensure the most energetically favorable atomic configuration. Crystallographic parameters and structural stability factors were evaluated to understand their influence on mechanical robustness and phase stability. The electronic properties were studied using both the Generalized Gradient Approximation and the Modified Becke–Johnson approximation to compute the electronic structure and bandgap values. The results indicate that both compounds exhibit an indirect bandgap, with the Modified Becke–Johnson approximation providing more accurate bandgap estimations compared to the Generalized Gradient Approximation, making it more consistent with experimental values. Optical analysis revealed that Cs₂AgBiCl₆ exhibits a stronger optical response, making it a promising material for optoelectronic applications. Additionally, thermoelectric investigations showed that Cs₂AgBiBr₆ has a higher figure of merit, indicating better potential for thermoelectric applications.</p>","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 3","pages":"515 - 524"},"PeriodicalIF":2.0,"publicationDate":"2026-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237323","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}