Physical Mesomechanics最新文献_第3页

Effect of Cooling Rate on the Microstructure and Strength of Friction Stir Welded Joints in a High-Strength AA7075 Alloy 冷却速率对高强度AA7075合金搅拌摩擦焊接接头组织和强度的影响

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2026-02-25 DOI: 10.1134/S1029959925601010

E. A. Sidorov, S. Yu. Tarasov, A. V. Chumaevskii, D. A. Gurianov, S. V. Fortuna, A. I. Amirov, V. E. Rubtsov, E. A. Kolubaev

{"title":"Effect of Cooling Rate on the Microstructure and Strength of Friction Stir Welded Joints in a High-Strength AA7075 Alloy","authors":"E. A. Sidorov, S. Yu. Tarasov, A. V. Chumaevskii, D. A. Gurianov, S. V. Fortuna, A. I. Amirov, V. E. Rubtsov, E. A. Kolubaev","doi":"10.1134/S1029959925601010","DOIUrl":"10.1134/S1029959925601010","url":null,"abstract":"The application of arc, plasma, laser, or electron beam welding methods to high-strength heat-treatable aluminum alloys, such as AA7075 belonging to a Al-Zn-Cu-Mg system, makes little sense because of the formation of weak heat-affected zones and hot cracks. Attempts were made to produce strong joints in these alloys using friction stir welding, which is a low heat input method. However, there are still problems with overaging and the formation of weak thermomechanically affected zones. In this research, we employ liquid flow cooling of the weld zone to eliminate overaging. It is found that the microhardness in the stir zone and the joint strength are maximum due to cooling at a medium liquid flow rate of ~4–6 l/min. All samples were subjected to artificial aging to eliminate weak thermomechanically affected zones, which further increased the microhardness and strength of joints. Structural studies reveal that the contribution from the dispersion strengthening mechanism under internal aging, which can be further enhanced by artificial aging, is maximum at medium cooling rates.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 1","pages":"127 - 141"},"PeriodicalIF":2.0,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147341988","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}

引用次数: 0

Behavior of Ultrafine-Grained Zn-1%Mg-0.1%Ca Alloy under Cyclic Loading 循环加载下超细晶Zn-1%Mg-0.1%Ca合金的行为

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2026-02-25 DOI: 10.1134/S1029959924601921

N. S. Martynenko, G. V. Rybalchenko, N. Yu. Tabachkova, O. V. Rybalchenko, E. A. Lukyanova, D. R. Temralieva, D. V. Prosvirnin, S. V. Dobatkin

{"title":"Behavior of Ultrafine-Grained Zn-1%Mg-0.1%Ca Alloy under Cyclic Loading","authors":"N. S. Martynenko, G. V. Rybalchenko, N. Yu. Tabachkova, O. V. Rybalchenko, E. A. Lukyanova, D. R. Temralieva, D. V. Prosvirnin, S. V. Dobatkin","doi":"10.1134/S1029959924601921","DOIUrl":"10.1134/S1029959924601921","url":null,"abstract":"The paper studies the microstructure and mechanical characteristics, in particular, fatigue strength, of the Zn-1%Mg-0.1%Ca alloy subjected to high-pressure torsion (HPT) at room temperature. The study shows that a mixed microstructure is formed in the alloy after HPT, which consists of α-Zn grains 700–900 nm in size, nanograins of a magnesium-rich phase 50–100 nm in size, and finely dispersed particles ~30–50 nm in size. The formation of such a structure leads to an increase in the yield stress of the alloy by ~2.5 times and in the ultimate tensile strength by ~2.7 times with a simultaneous significant growth in ductility (approximately by 13 times). An increase in the static strength is also accompanied by an increase in the fatigue strength by 1.7 times. However, the increase in fatigue strength is less pronounced compared to the increase in static strength. The fatigue strength increases by almost 70% above that of the initial alloy (from 65 MPa to 110 MPa, respectively). Upon reaching 2.8 × 106 loading cycles by the repeated tension scheme, fracture of the specimen is accompanied by the formation of microcracks directed perpendicular to the fatigue crack front and located near the final fracture zone.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 1","pages":"14 - 24"},"PeriodicalIF":2.0,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147341828","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}

引用次数: 0

Regularities of Dispersion Hardening of Al-Mg-Si-Cu Alloy during Artificial Aging Al-Mg-Si-Cu合金在人工时效过程中的弥散硬化规律

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2026-02-25 DOI: 10.1134/S1029959924601945

A. I. Bodyakova, I. S. Zuiko, A. A. Kalinenko, D. Yu. Yuzbekova, E. I. Chistyukhina, R. O. Kaibyshev

{"title":"Regularities of Dispersion Hardening of Al-Mg-Si-Cu Alloy during Artificial Aging","authors":"A. I. Bodyakova, I. S. Zuiko, A. A. Kalinenko, D. Yu. Yuzbekova, E. I. Chistyukhina, R. O. Kaibyshev","doi":"10.1134/S1029959924601945","DOIUrl":"10.1134/S1029959924601945","url":null,"abstract":"The effect of solution treatment and aging on the phase composition and physicomechanical properties of an Al-Mg-Si-Cu alloy is investigated. An increase in the solution temperature from 530 to 550°C leads to the hardness increase from 59 ± 1 to 68 ± 2 HV and the electrical conductivity decrease from 38.9 ± 0.1 to 36.0 ± 0.1 % IACS, respectively. The stress–strain curves after solution treatment are characterized by jerky flow or the Portevin–Le Chatelier effect, which is associated with the dissolution of particles at high temperatures and the formation of a supersaturated solid solution in the alloy after solution treatment. Aging at 190°C leads to a nonmonotonic behavior of hardness. The maximum hardness of 143 ± 4 HV is observed after aging for 2 h. The β″, β′, Q′ particles, clusters, and Guinier–Preston zones provide maximum hardness in the alloy. Dispersion hardening leads to an increase in the yield stress and ultimate tensile strength to 340 ± 5 and 390 ± 10 MPa, respectively, at the elongation of about 12.3 ± 1.6%. The high ductility of the alloy (approximately 2% higher than the previously published literature data) may be a result of the absence of needle-like Al5FeSi particles due to a targeted reduction in the Fe concentration in the alloy.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 1","pages":"25 - 41"},"PeriodicalIF":2.0,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147341829","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}

引用次数: 0

Additional Substrate Heating in Direct Laser Deposition of Inconel 738 直接激光沉积Inconel 738的附加衬底加热

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2026-02-25 DOI: 10.1134/S1029959925600910

M. A. Gulov, I. S. Gertsel, A. G. Malikov

{"title":"Additional Substrate Heating in Direct Laser Deposition of Inconel 738","authors":"M. A. Gulov, I. S. Gertsel, A. G. Malikov","doi":"10.1134/S1029959925600910","DOIUrl":"10.1134/S1029959925600910","url":null,"abstract":"The paper is devoted to the study of the process of direct metal deposition of nickel alloy Inconel 738. It is shown that the use of additional substrate preheating to 750°C prevents crack formation in the material. The influence of additional heating during the deposition process on the structural-phase composition of the formed material is studied. It is demonstrated that additional heating promotes an increase in the grain size, as well as changes in their shape and growth direction. The microstructure is studied using electron microscopy, and the distribution of alloying elements within and at grain boundaries is investigated depending on the substrate preheating temperature. Using synchrotron radiation, it is established that preheating the substrate to 750°C during direct laser deposition of Inconel 738 leads to the formation of M23C6 carbides and the enrichment of the metal matrix with the strengthening γ' (Ni3Al) and γ'' (Ni3Al) phases. Data on the change in the temperature gradient and the cooling rate of the melt pool depending on the substrate temperature are obtained. The mechanical properties of the resulting specimens are measured: hardness, microhardness, wear resistance, and friction coefficient. The substrate preheating contributes to an increase in hardness by 48%, microhardness by 55%, and wear resistance of the obtained coating by 35%.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"29 1","pages":"115 - 126"},"PeriodicalIF":2.0,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147341987","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}

引用次数: 0

Variability of Effective Elastic Properties of Two-Layered Plates of Orthorhombic Crystals 正交晶体两层板有效弹性性能的变异性

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2025-12-26 DOI: 10.1134/S102995992560034X

M. A. Volkov, V. А. Gorodtsov, D. S. Lisovenko

引用次数: 0

Hierarchy of the Metal Fatigue Mechanisms Based on the Physical Mesomechanics Methodology 基于物理细观力学方法的金属疲劳机制层次分析

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2025-12-26 DOI: 10.1134/S1029959925600120

A. A. Shanyavskiy, A. P. Soldatenkov, A. D. Nikitin

引用次数: 0

Dislocation-Based Constitutive Model: Description of the Influence of Grain Boundaries on the Deformation of Metals 基于位错的本构模型：描述晶界对金属变形的影响

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2025-12-26 DOI: 10.1134/S1029959925600442

P. V. Trusov, K. A. Kurmoyartseva, D. S. Gribov

{"title":"Dislocation-Based Constitutive Model: Description of the Influence of Grain Boundaries on the Deformation of Metals","authors":"P. V. Trusov, K. A. Kurmoyartseva, D. S. Gribov","doi":"10.1134/S1029959925600442","DOIUrl":"10.1134/S1029959925600442","url":null,"abstract":"A modification of the dislocation-based constitutive model is proposed to describe the deformation of polycrystalline materials taking into account intragranular and grain boundary strengthening. The developed model is based on the introduction of internal variables, physical elastoviscoplasticity theory, and multilevel approach; it is considered at three (macro, meso-1, and meso-2) hierarchically related structural and scale levels. At the upper level (of a representative macrovolume), the response of the material (a measure of the stress state) to thermomechanical effects (given changes in the measure of deformation and temperature) is determined. Elements of the meso-1 and meso-2 levels have the same scales, differing in the way they are described. The meso-1 elements are considered in terms of mechanical variables (stress measures, residual and critical shear stresses, and shear rates in slip systems). At the meso-2 level, the description is carried out in terms of densities and velocities of dislocations. Particular attention is paid to the interaction of dislocations with grain boundaries, which have a significant effect on the behavior of polycrystalline materials. Grain boundaries determine the local stress-strain state and are barriers to dislocation slip, which can lead to dislocation pile-ups in the near-boundary regions. The submodel taking into account the dislocation flow in the vicinity of grain and subgrain boundaries within the dislocation-based model is described in detail. Examples of the model application to the study of loading of bicrystal specimens are given. It is shown that the developed model allows describing dislocation fluxes through the boundary and takes qualitative account of grain-boundary strengthening.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"28 6","pages":"801 - 818"},"PeriodicalIF":2.0,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145831118","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}

引用次数: 0

Computational Mesomechanics of Materials Using the Example of Additively Manufactured Eutectic Aluminum-Silicon Alloy 以增材制造共晶铝硅合金为例的材料计算细观力学

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2025-12-26 DOI: 10.1134/S1029959925600089

R. R. Balokhonov, V. A. Romanova, A. V. Zemlianov, D. D. Gatiyatullina, A. R. Shugurov, I. R. Ivashov, V. R. Balokhonov, А. S. Kulkov, Е. М. Dymnich

{"title":"Computational Mesomechanics of Materials Using the Example of Additively Manufactured Eutectic Aluminum-Silicon Alloy","authors":"R. R. Balokhonov, V. A. Romanova, A. V. Zemlianov, D. D. Gatiyatullina, A. R. Shugurov, I. R. Ivashov, V. R. Balokhonov, А. S. Kulkov, Е. М. Dymnich","doi":"10.1134/S1029959925600089","DOIUrl":"10.1134/S1029959925600089","url":null,"abstract":"The study numerically investigates deformation and fracture of the eutectic AlSi12 alloy produced by wire-feed electron beam additive manufacturing. A top-down approach is implemented for the numerical and experimental determination of local plastic and strength properties of materials. The alloy structure is experimentally examined on different scales using optical microscopy. Mechanical uniaxial tensile and nanoindentation tests are performed. Based on the experimental data, the finite element models of the layered structure at the macrolevel and dendritic structure at the mesolevel are created. The top-down analysis involves sequential numerical simulations at the macro- and mesolevels to extract the mechanical properties of aluminum in the eutectic material and dendrites. Based on the experimental flow curve and nanoindentation data, hardening functions and ultimate strains are determined for the layer and interlayer materials by numerically simulating the layered structure tension on the macroscale. The obtained layer properties and nanoindentation data are then used to derive the properties of aluminum in the eutectic and dendrites by simulating the dendritic structure tension on the mesoscale. The derived plastic and strength characteristics of aluminum and the eutectic are used to numerically analyze heterogeneous plastic flow and cracking in the dendritic structure with an interlayer containing micron-sized silicon particles.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"28 6","pages":"728 - 744"},"PeriodicalIF":2.0,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145831361","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}

引用次数: 0

Transonic Edge Dislocation Problem 跨音速边缘位错问题

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2025-12-26 DOI: 10.1134/S1029959925600016

V. M. Sadovskii, O. V. Sadovskaya

引用次数: 0

Crack Growth under Isothermal and Thermomechanical Fatigue and Dominant Failure Mechanisms in Heat-Resistant Alloy 耐热合金在等温和热机械疲劳下裂纹扩展及主要失效机制

IF 2 4区材料科学

Physical Mesomechanics Pub Date : 2025-12-26 DOI: 10.1134/S1029959925600168

V. N. Shlyannikov, А. А. Shanyavskiy

引用次数: 0