Physical Mesomechanics最新文献_第5页

Localized Plasticity Pattern at the Prefracture Stage: Origin and Development 断裂前阶段的局部可塑性模式：起源与发展

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010053

L. B. Zuev, Yu. A. Khon

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Combination Effect of Transition Metal Impurities on Oxygen Vacancy Formation Energetics in TiO2 过渡金属杂质对二氧化钛中氧空位形成能量的组合效应

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010065

A. V. Bakulin, L. S. Chumakova, S. O. Kasparyan, S. E. Kulkova

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Dislocation Structure in a Strain Localization Band Formed in Normalized 09G2S Steel under Tension 正火 09G2S 钢在张力作用下形成的应变局部带中的位错结构

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S102995992401003X

V. M. Farber, O. V. Selivanova, A. N. Morozova, V. A. Khotinov, M. S. Khadyev, A. Yu. Zhilyakov

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Structural-Phase State and Mechanical Properties of a Laser Cladding Titanium Matrix Composite Based on Ti64 Alloy and TiB2 Ceramics 基于 Ti64 合金和 TiB2 陶瓷的激光熔覆钛基复合材料的结构相态和力学性能

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010016

V. M. Fomin, A. G. Malikov, A. A. Golyshev, N. V. Bulina, M. A. Gulov, I. E. Vitoshkin, T. A. Brusentseva, A. A. Filippov, A. V. Mishin

{"title":"Structural-Phase State and Mechanical Properties of a Laser Cladding Titanium Matrix Composite Based on Ti64 Alloy and TiB2 Ceramics","authors":"V. M. Fomin, A. G. Malikov, A. A. Golyshev, N. V. Bulina, M. A. Gulov, I. E. Vitoshkin, T. A. Brusentseva, A. A. Filippov, A. V. Mishin","doi":"10.1134/S1029959924010016","DOIUrl":"10.1134/S1029959924010016","url":null,"abstract":"The paper presents experimental studies on laser cladding synthesis of a titanium matrix composite based on Ti64 titanium alloy and TiB2 ceramic reinforcement. The weight percentage of TiB2 ceramics in the composite was 5, 10 and 15%. The phase composition of the resulting materials was analyzed by standard X-ray diffraction and synchrotron X-ray diffraction. It was found that the structure of the titanium matrix composite with 5 wt % ceramics consists of TiB nanowhiskers, and that of samples with higher ceramic content exhibits TiB whiskers with a width of several micrometers. The addition of TiB2 ceramics increases Young’s modulus, nano- and microhardness of composite samples compared to Ti64 alloy. The indentation method was used to study the formation of a phase that is different from TiB2 ceramics and TiB microwhiskers and has elastic properties exceeding the elastic properties of the original Ti64 matrix phase. Analytical predictions showed an increase in the effective elastic properties of the formed heterogeneous material with the predicted new phase. It was also found that a lower friction coefficient can be achieved by forming a structure with nanowhiskers, while higher Young’s modulus and microhardness can be obtained by forming a structure with microwhiskers.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 1","pages":"1 - 15"},"PeriodicalIF":1.8,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139768789","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}

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Experimental and Numerical Investigation of Mesoscale Deformation-Induced Surface Roughening in Polycrystalline Metals and Alloys (Review) 多晶金属和合金中尺度变形引起的表面粗化的实验和数值研究（综述）

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010028

E. S. Emelianova, O. S. Zinovieva, V. A. Romanova, R. R. Balokhonov, M. Pisarev

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Creep Resistance and Structure of 10% Cr–3% Сo–2% W–0.29% Cu–0.17% Re Steel with Low Nitrogen and High Boron Contents for Unit Components of Coal Power Plants 用于煤电厂机组部件的低氮高硼含量 10% Cr-3% Сo-2% W-0.29% Cu-0.17% Re 钢的抗蠕变性和组织结构

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010090

A. Fedoseeva

{"title":"Creep Resistance and Structure of 10% Cr–3% Сo–2% W–0.29% Cu–0.17% Re Steel with Low Nitrogen and High Boron Contents for Unit Components of Coal Power Plants","authors":"A. Fedoseeva","doi":"10.1134/S1029959924010090","DOIUrl":"10.1134/S1029959924010090","url":null,"abstract":"The creep resistance and structure of 10% Cr–3% Сo–2% W–0.29% Cu–0.17% Re steel with 0.1% carbon, low nitrogen content and high boron content were investigated by creep rupture testing at a temperature of 650°C and stresses from 200 to 100 MPa applied in 20-MPa increments. For comparison, 9% Cr steel with 0.1% carbon, 0.05% nitrogen, and 0.005% boron was considered. The steels were subjected to preliminary heat treatment including normalizing at 1050°C for 1 hour, tempering at 750–770°C for 3 hours, and cooling in air. The structures of both heat-treated steels exhibited martensite laths with boundaries pinned by М23С6 carbides, and the rearrangement of dislocations was retarded by MX particles. A significant difference between 10% Cr and 9% Cr steels was the presence of fine М23С6 carbide particles characterized by orientational relationships with the ferrite matrix and MX carbonitrides, whose volume fraction was 6 times lower. Short-term tensile tests at room temperature showed no differences between the steels, while the creep rupture strength of 10% Cr steel was 13% higher than for 9% Cr steel. The creep deformation mechanism of the steels was also different. Structural analysis of 10% Cr steel after creep tests revealed no substantial changes in its lath structure: the lath width increased by only 58% and the dislocation density was reduced by a factor of 2. Comparison with 9% Cr steel showed that the good structural stability of 10% Cr steel during creep is caused by the high coarsening resistance of second phase particles, whose coarsening rate is 1-2 orders of magnitude lower than that in 9% Cr steel.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 1","pages":"88 - 101"},"PeriodicalIF":1.8,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139768790","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

Meso–Macro Energy Exchange in Shock-Wave Processes and Dynamic Strength of AB2 Steel 冲击波过程中的中宏观能量交换与 AB2 钢的动态强度

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010107

Yu. I. Meshcheryakov, G. V. Konovalov, N. I. Zhigacheva, A. K. Divakov

{"title":"Meso–Macro Energy Exchange in Shock-Wave Processes and Dynamic Strength of AB2 Steel","authors":"Yu. I. Meshcheryakov, G. V. Konovalov, N. I. Zhigacheva, A. K. Divakov","doi":"10.1134/S1029959924010107","DOIUrl":"10.1134/S1029959924010107","url":null,"abstract":"Impact tests of low-alloy martensitic-bainitic steel AB2 showed that the scale of dynamic deformation and the fracture mechanism change in a threshold manner. The change in the mechanism and scale of fracture is triggered by the resonant excitation of large-scale structural elements of the material (grain conglomerates) due to plastic flow oscillations. In this case, the grain-boundary mechanism of dynamic fracture is replaced by a transcrystalline one. Beyond the strain rate threshold, mesoscopic elementary carriers of dynamic deformation are divided into two groups: low-velocity and high-velocity. Accordingly, the velocity distribution of mesoparticles shows two humps. The velocity spread of mesoparticles sharply increases under these conditions, while the mass velocity defect (change in the shock wave amplitude) becomes negative. The latter fact indicates the local acceleration of mesoparticles in discrete regions of the target (the so-called shooting of mesoparticles in the shock wave direction). Transcrystalline cracks are randomly distributed throughout the specimen and have a random orientation.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 1","pages":"102 - 112"},"PeriodicalIF":1.8,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139768572","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}

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Development of an Energy-Based Experimental Method for Estimation of Fatigue Crack Evolution in Titanium Alloys 开发基于能量的实验方法，用于估算钛合金疲劳裂纹的演变

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010041

A. Yu. Iziumova, A. N. Vshivkov, O. A. Plekhov

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Mechanical Properties of Sintered Al–Sn–Fe Alloys 烧结 Al-Sn-Fe 合金的机械性能

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010077

N. M. Rusin, A. L. Skorentsev, K. O. Akimov

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Effect of Preliminary Ball Milling of Nanomodifiers on Their Efficiency in Laser Surface Treatment of Titanium 纳米改性剂的初步球磨对激光表面处理钛效率的影响

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-02-08 DOI: 10.1134/S1029959924010089

A. E. Chesnokov, V. O. Drozdov, K. A. Skorokhod, A. V. Smirnov, A. N. Cherepanov

{"title":"Effect of Preliminary Ball Milling of Nanomodifiers on Their Efficiency in Laser Surface Treatment of Titanium","authors":"A. E. Chesnokov, V. O. Drozdov, K. A. Skorokhod, A. V. Smirnov, A. N. Cherepanov","doi":"10.1134/S1029959924010089","DOIUrl":"10.1134/S1029959924010089","url":null,"abstract":"This study examines how preliminary mechanical milling of a modifying TiN-based powder mixture affects the morphology of the CO2 laser-treated surface, the weld pool morphology, and the cross-sectional structure of the material. Ultrafine titanium nitride particles used as nanomodifier have low wettability by liquid metal, are not entrained by its convective flows, and tend to accumulate in the subsurface layer, which makes it difficult to effectively modify the structure within the treated material. Ball milling of the modifying Ti + TiN mixture for 9 min leads to the formation of composite particles (5–7 µm) with ultrafine TiN particles uniformly distributed over their surface and volume. When the composite particles are melted by the laser beam, they turn to ultrafine TiN particles of nanomodifier coated with a thin titanium layer, which have a smaller contact angle. As a result, the particles are more evenly distributed over the weld pool and the number of crystallization centers increases, leading to the formation of a fine homogeneous structure of the material. The microhardness increases by 32%, and its standard deviation decreases by a factor of 1.5–3.0.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 1","pages":"79 - 87"},"PeriodicalIF":1.8,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139768792","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