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Journal of Materials science & Technology 2005年第3期21卷 427-429页

作者： V.E.Ovcharenko BaohaiYU s.g.psakhie InstituteofstrengthPhysicsandMaterialsscience SiberiaBranchRussianAcademyofSciences2/1AcademicheskyPr.Tomsk634021Russia InstituteofMetalResearch ChineseAcademyofSciences72WenhuaRoadShenyang110016China

An experimental investigation were performed on the effect of the impulse electron-beam irradiation upon microstruc-ture of the surface layer and on wear resistance of a cutting tool for sintered TiC/NiCr cermet. The results showed that the surface electron-beam treatment of the TiC/NiCr cermet is an efficient method for investigating the mi-crostructure and phase composition in the surface layer of the powder composite and there are optimal regimes of electron-beam treatment, which ensure a substantial increase in the resistance of the cermet to wear during cutting of metals.

关键词： Cermet TiC/NiCr Electron-beam treatment Microstructure Wear resistance

Electron-beam Treatment of Tungsten-free TiC/NiCr CermetⅡ: structural Transformations in the subsurface Layer

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Journal of Materials science & Technology 2006年第4期22卷 511-513页

作者： Baohai YU V.E.Ovcharenko s.g.psakhie O.V.Lapshin Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Institute of strength Physics and Materials science Siberia Branch Russian Academy of Sciences Russia

The character of structural changes in the surface layer of titanium carbide （TiC） with Ni-Cr alloy binder was investigated theoretically and experimentally after electron-beam treatment of the material surface. The thermal influence of the electron-beam irradiation on the surface layer microstructure of the composite fine-grained material was mathematically analyzed. Quantitative estimations of the depth of the zone in microstructural phase transformations were carried out. The microstructure and concentration profile of Ti distribution in the metallic binder over the cross section of the surface layer with microstructural phase transformations after electron-pulse treatment of the hard metal surface were experimentally investigated.

关键词： Cermets TiC/NiCr Electron-beam treatment structural transformation

Understanding the mechanisms of friction stir welding based on computer simulation using particles

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Defence Technology（防务技术） 2018年第6期14卷 643-656页

作者： A.Yu.smolin E.V.shilko s.V.Astafurov E.A.Kolubaev g.M.Eremina s.g.psakhie Institute of strength Physics and Materials science sB RAs Tomsk634055Russia Tomsk state University Tomsk634050Russia skolkovo Institute of science and Technology Skolkovo143025Russia

Friction stir welding(FsW) is a novel technique for joining different materials without melting. In FsW the welded components are joined by stirring the plasticized material of the welded edges with a special rotating pin plunged into the material and moving along the joint line. From the scientific point of view,the key role of the FsW processes belongs to formation of the special plasticized conditions and activation of physical mechanisms of mixing the materials in such conditions to produce the strong homogeneous weld. But it is still a lack of complete understanding of what are these conditions and *** paper is devoted to understanding the mechanisms of material mixing in conditions of FsW based on a computer simulation using particles. The movable cellular automaton method(MCA), which is a representative of the particle methods in mechanics of materials, was used to perform all ***, material flow including material stirring in FsW is simulated using computational fluid mechanics or smoothed particle hydrodynamics, which assume that the material is a continuum and does not take into account the material structure. MCA considers a material as an ensemble of bonded particles. Breaking of inter-particle bonds and formation of new bonds enables simulation of crack nucleation and healing, as well as mass mixing and *** paper consists of two main parts. In the first part, the simulations in 2 D statements are performed to study the dynamics of friction stir welding of duralumin plates and influence of different welding regimes on the features of the material stirring and temperature distribution in the forming welded joints. It is shown that the ratio of the rotational speed to the advancing velocity of the tool has a dramatic effect on the joint quality. A suitable choice of these parameters combined with additional ultrasonic impact could considerably reduce the number of pores and microcracks in the weld without significa

关键词： Friction stir welding Plastic flow Deformation mechanisms simulation Particle method

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模拟长杆弹侵彻混凝土靶的MCA方法

爆炸与冲击 2004年第2期24卷 127-132页

作者：陈克黄德武 s.g.psakhie 南京理工大学动力工程学院江苏南京210094 沈阳工业学院辽宁沈阳110016 Institute of strength Physics and Material science

采用改进的移动元胞自动机法数值软件,对长杆弹侵彻混凝土靶进行了二维数值模拟,给出了弹靶的破坏变形过程,得到了侵彻深度与冲击速度的关系曲线。数值模拟结果与已有的实验现象吻合较好,说明该计算方法可以有效地计算和模拟高速侵彻问题。

关键词：混凝土靶冲击速度侵彻深度数值模拟长杆弹移动元胞自动机法

Computer simulation of Plastic Deformation in grainBoundary Region under High Rate Loading

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Journal of Materials science & Technology 1996年第3期12卷 235-237页

作者： K.P.Zolnikov s.g.psakhie s-I.Negrskul and s. Yu.Korostelev (Institute of strength Physics and Materials science, Russian Academy of sicences, siberian Branch,Akademicheskii pr.2/1, 634048 Tomsk, Russia)(To whom correspondence should be addressed) Institute of strength Physics and Materials science Russian Academy of Sicences Siberian Branch Akademicheskii pr.2/1 634048 Tomsk Russian Federation

The computer simulation of Al three-dimensional crystallite containing grain boundary of special type was carried out and its behaviour under high rate loading was investigated. The molecular dynamics method was used and interaction betwen atoms was described based on pseudopotential method. Vortical character of the atom movements in the grain boundary region is realized under shear loading in certain directions. Back and forth movements of atoms in the direction which is perpendicular to the shear also arise. Amplitude of such movements is approximately equal to an interplanar distance in this direction.

关键词： simulation Computer simulation of Plastic Deformation in grainBoundary Region under High Rate Loading

Modeling mechanical behaviors of composites with various ratios of matrixeinclusion properties using movable cellular automaton method

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Defence Technology（防务技术） 2015年第1期11卷 18-34页

作者： A.Yu.sMOLIN E.V.sHILKO s.V.AsTAFUROV I.s.KONOVALENKO s.P.BUYAKOVA s.g.psakhie Institute of strength Physics and Materials science sB RAs Tomsk state University Institute of High Technology Physics Tomsk Polytechnic University skolkovo Institute of science and Technology

Two classes of composite materials are considered: classical metaleceramic composites with reinforcing hard inclusions as well as hard ceramics matrix with soft gel inclusions. Movable cellular automaton method is used for modeling the mechanical behaviors of such different heterogeneous materials. The method is based on particle approach and may be considered as a kind of discrete element method. The main feature of the method is the use of many-body forces of inter-element interaction within the formalism of simply deformable element approximation. It was shown that the strength of reinforcing particles and the width of particle-binder interphase boundaries had determining influence on the service characteristics of metaleceramic composite. In particular, the increasing of strength of carbide inclusions may lead to significant increase in the strength and ultimate strain of composite material. On the example of porous zirconia ceramics it was shown that the change in the mechanical properties of pore surface leads to the corresponding change in effective elastic modulus and strength limit of the ceramic sample. The less is the pore size, the more is this effect. The increase in the elastic properties of pore surface of ceramics may reduce its fracture energy.

关键词： Composites Metal ceramics Zirconia ceramics gel Modeling Movable cellular automata Many-body interaction

Inspection of aluminum alloys by a multi-frequency eddy current method

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Defence Technology（防务技术） 2015年第2期11卷 99-103页

作者： A.V.EgOROV V.V.POLYAKOV D.s.sALITA E.A.KOLUBAEV s.g.psakhie A.g.CHERNYAVsKII I.V.VOROBEI Altai state University Institute of strength Physics and Materials science sB RAs National Research Tomsk Polytechnic University s.P.Korolev Rocket and space Corporation "Energia"

The paper proposes an experimental method of material inspection,which is based on digital processing of multi-frequency eddy current measurement *** influences of various factors(conductivity,the gap between the sample surface and the sensor,the thickness of the sample) on the obtained hodographs are examined by taking the aluminum alloys for example,and the possibility of separation of various factors is *** results obtained are indicative of how much promise the proposed method offers for the inspection and testing of products made of aluminum alloys.

关键词：铝合金涡流法检查多频数字处理测量数据电导率传感器

About Nonlinear Mechanism of Energy Transformation at Ion Implantation

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Journal of Materials science & Technology 1999年第6期15卷 581-582页

作者： s.g.psakhie, K.P.Zolnikov, R.I.Kadyrov, g.E.Rudenskii, s.A.Vassiliev and Yu.P.shatheev (Institute of strength Physics and Materials science, Russian Academy of sciences, siberian Branch, Tomsk, Russia) Institute of strength Physics and Materials science Russian Academy of Sciences Siberian Branch Tomsk Russian Federation

The peculiarities of energy dissipation transferred by solitary waves on defects such as freesurface, grain boundary, region with high concentration of vacancies are studied. One of theways of description of the long ... 详细信息

关键词： About Nonlinear Mechanism of Energy Transformation at Ion Implantation

study of hybrid nanofluid flow in a stationary cone-disk system with temperature-dependent fluid properties

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 677-694页

作者： A.s.JOHN B.MAHANTHEsH g.LORENZINI Center for Mathematical Needs Department of MathematicsCHRIST(Deemed to be University)Karnataka 560029India school of Mathematical and statistical sciences The University of Texas Rio Grande ValleyTexas 78539U.S.A. Department of Engineering and Architecture University of ParmaParma 43124Italy

Cone-disk systems find frequent use such as conical diffusers,medical devices,various rheometric,and viscosimetry *** this study,we investigate the three-dimensional flow of a water-based Ag-Mg O hybrid nanofluid in a static cone-disk system while considering temperature-dependent fluid *** the variable fluid properties affect the dynamics and heat transfer features is studied by Reynolds's linearized model for variable viscosity and Chiam's model for variable thermal *** single-phase nanofluid model is utilized to describe convective heat transfer in hybrid nanofluids,incorporating the experimental *** model is developed as a coupled system of convective-diffusion equations,encompassing the conservation of momentum and the conservation of thermal energy,in conjunction with an incompressibility condition.A self-similar model is developed by the Lie-group scaling transformations,and the subsequent self-similar equations are then solved *** influence of variable fluid parameters on both swirling and non-swirling flow cases is ***,the Nusselt number for the disk surface is *** is found that an increase in the temperature-dependent viscosity parameter enhances heat transfer characteristics in the static cone-disk system,while the thermal conductivity parameter has the opposite effect.

关键词： hybrid nanofluid cone-disk system laminar flow variable fluid property Nusselt number

Transmission of amyloid-βpathology in humans:a perspective on clinical evidence

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Neural Regeneration Research 2024年第2期19卷 390-392页

作者： Celso s.g.Catumbela Rodrigo Morales Department of Neurology McGovern Medical SchoolThe University of Texas Health Science Center at HoustonHoustonTXUSA Centro Integrativo de Biologia y Quimica Aplicada(CIBQA) Universidad Bernardo O’HigginsSantiagoChile

Transmission of misfolded amyloid-β(Aβ)aggregates between human subjects:Protein misfolding disorders are a family of diseases characterized by the accumulation of misfolded protein *** proteinaceous structures,also known as amyloids,are key drivers of fatal neurodegenerative disorders such as prion diseases,Alzheimer’s disease(AD),Parkinson’s disease,and others.

关键词： amyloid diseases Aβ