Персона:
Осинцев, Андрей Вениаминович

Организационные подразделения

Организационная единица

Институт общей профессиональной подготовки (ИОПП)

Миссией Института является: фундаментальная базовая подготовка студентов, необходимая для получения качественного образования на уровне требований международных стандартов; удовлетворение потребностей обучающихся в интеллектуальном, культурном, нравственном развитии и приобретении ими профессиональных знаний; формирование у студентов мотивации и умения учиться; профессиональная ориентация школьников и студентов в избранной области знаний, формирование способностей и навыков профессионального самоопределения и профессионального саморазвития. Основными целями и задачами Института являются: обеспечение высококачественной (фундаментальной) базовой подготовки студентов бакалавриата и специалитета; поддержка и развитие у студентов стремления к осознанному продолжению обучения в институтах (САЕ и др.) и на факультетах Университета; обеспечение преемственности образовательных программ общего среднего и высшего образования; обеспечение высокого качества довузовской подготовки учащихся Предуниверситария и школ-партнеров НИЯУ МИФИ за счет интеграции основного и дополнительного образования; учебно-методическое руководство общеобразовательными кафедрами Института, осуществляющими подготовку бакалавров и специалистов по социо-гуманитарным, общепрофессиональным и естественнонаучным дисциплинам, обеспечение единства требований к базовой подготовке студентов в рамках крупных научно-образовательных направлений (областей знаний).

Фамилия

Осинцев

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Андрей Вениаминович

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Теперь показываю 1 - 10 из 13

Только метаданные
Application of the "brazilian test" to determine the strength of materials obtained by electric pulse consolidation of powders
(2019) Grigor'Ev, E. G.; Goltsev, V. Y.; Gribov, N. A.; Osintsev, A. V.; Plotnikov, A. S.; Осинцев, Андрей Вениаминович
© 2019 IOP Publishing Ltd. All rights reserved.Testing of short cylinders according to the "Brazilian test" scheme is considered as a method of assessing the tensile strength of brittle materials obtained by electric pulse consolidation of powders. The paper presents a calculated using FEM and an experimental analysis of the behavior of short cylinders (thick disks) when loaded according to the "Brazilian test" scheme. The calculation shows the weak influence of the disk thickness on the average and maximum tensile stresses in the plane of symmetry of the disk. Results of testing of small samples made of cast iron and graphite are presented. It is shown a good correspondence between the results of the test samples from cast iron when using formula recommended by the ASTM Standard D3967-95a, and the strength of the material when tested in tension. The results of testing samples of graphite were 1.5-2 times less than its tensile strength. The results of testing of small-size samples of heavy alloy WNiFe and aluminum oxide obtained by electric pulse consolidation of powders are presented. The influence of the pressure and current pulse on the fracture resistance of the alloy WNiFe and the sample thickness on the strength of Al2O3 is investigated. Thus, the possibility of testing small samples according to the "Brazilian test" scheme to determine the tensile strength of materials obtained by electric pulse consolidation of powders is demonstrated.
Только метаданные
Applying Scanning Contact Potentiometry for Monitoring Incipient Cracks in Steels
(2019) Surin, V. I.; Polskij, V. I.; Osintsev, A. V.; Dzhumaev, P. S.; Сурин, Виталий Иванович; Польский, Валерий Игоревич; Осинцев, Андрей Вениаминович; Джумаев, Павел Сергеевич
© 2019, Pleiades Publishing, Ltd. The processes of formation and growth of an incipient crack in EI847 steel have been studied by uniaxial constant-load tension testing on an INSTRON-5982 tensile testing machine using scanning contact potentiometry. The nucleus was detected at the sample surface within the yield strength domain and was stably monitored based on the readings of apparatus under higher loads until the moment of destruction.
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Evaluation of tensile strength of nuclear fuel samples
(2019) Goltsev, V. Y.; Osintsev, A. V.; Осинцев, Андрей Вениаминович
© 2019 IOP Publishing Ltd. All rights reserved.For estimation of the strength of the nuclear fuel material as well and for further refinement of nuclear fuel test technology we propose to use small discoid samples, similar in shape to the elements of nuclear fuel in the context of "Brazilian test". We present here the results of testing small discoid specimens with and without center hole, made of brittle materials, such as cast iron and graphite (both being considered as possible model materials for the nuclear fuel). We compared these materials to nuclear fuel itself (as represented by uranium dioxide). The type of deformation and fracture found in samples made from cast iron suggests that this material cannot be used as a model for the nuclear fuel. In addition, the effect of the specimen size on resistance to destruction was investigated. The results obtained in tests on samples of graphite ARV-1 were in good agreement with the results of tests on uranium dioxide. Using the data obtained in this study, a calculation formula for determining the strength of the nuclear fuel material based on the "Brazilian test" results is proposed.
Только метаданные
Tensile strength of materials obtained by electric pulse consolidation of powders
(2019) Grigor'Ev, E. G.; Goltsev, V. Y.; Gribov, N. A.; Osintsev, A. V.; Plotnikov, A. S.; Осинцев, Андрей Вениаминович
© 2019 IOP Publishing Ltd. All rights reserved.The article investigates the possibility of determining the resistance to fracture of materials obtained from powders by electric pulse consolidation method using the test method for bending thin disks on an annular support and testing short cylinders according to the "Brazilian test". Techniques are verified by testing small-sized thin disks and short cylinders made of gray cast iron and graphite. It is revealed a difference in the nature of the destruction of cast iron samples (plastic failure) and samples of graphite (brittle fracture). The good correspondence of the characters of destruction of graphite samples and samples produced from powders by the electric pulse consolidation is shown. The influence of various additives and manufacturing technology of materials on the resistance of the material to brittle fracture is revealed. The optimal modes of high voltage consolidation a heavy alloy based on the results of tests of short cylinders according to the "Brazilian test" scheme were obtained. The effect of the thickness of the cylinders on the strength of aluminum oxide Al2O3 is investigated.
Только метаданные
Influence of crystallographic texture and phase composition on the effect of superelastinity of foils from alloys based on Ti-Nb
(2019) Zaripova, M. M.; Isaenkova, M. G.; Perlovich, Yu. A.; Osintsev, A. V.; Fesenko, V. A.; Исаенкова, Маргарита Геннадьевна; Осинцев, Андрей Вениаминович; Фесенко, Владимир Александрович
© 2019 Chelyabinsk State University. All rights reserved.The results is presented of the analysis of the structure, crystallographic texture and anisotropy of manifestation of the superelasticity effect for foils rolled from forged ingots of Ti-22%Nb-6%Zr, Ti-9%Nb-46%Zr, Ti-22% Nb-(1-1,5)%O (at.%) and subjected to heat treatment. Based on the analysis of formation patterns of the crystallographic texture in foils as a result of their cold rolling, the main mechanisms of plastic deformation, which are activated in the listed alloys, are revealed. The variation of the annealing temperature in the range of 550-700°C allows changing the structure and the +crystallographic texture of the deformed foils due to the activation of various processes during annealing and, thus, the functional and mechanical properties of the material. Tests of the foils examined under tension and under cyclic loading (stretching up to a strain of 2.5%, followed by complete unloading of the sample) along and across their rolling direction confirm the presence of anisotropy of the manifestation of superelasticity effect in the materials. It is shown that this effect is orientational and structurally dependent.
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High-voltage consolidation W-based heavy alloys
(2019) Evgeny, G.; Vladimir, G.; Natalya, E.; Andrey, O.; Aleksandr, P.; Осинцев, Андрей Вениаминович
© European Powder Metallurgy Association (EPMA)The experimental results of high voltage consolidation W-based heavy alloys are discussed. The results of investigation of the macro- and microstructure of consolidated materials and the stress - strain testing are presented. Compression testing showed that all tested alloys bear compressive stress at room temperature without failure. The plasticity of the heavy tungsten alloy is one of the objectives of the current research. The high-voltage consolidation contributes to maintaining an initial fine-grained structure, more uniform distribution of iron-nickel binder and almost total absence of porosity. The optimal modes of high voltage consolidation W-based heavy alloys on the results of tests of short cylinders according to the “Brazilian test” scheme were obtained. Examples of the use of high voltage consolidation and the direction of further research are considered.
Только метаданные
TEXTURE FORMATION IN BIOMEDICAL SUPERELASTIC Ti – Zr – Nb ALLOYS DURING ROLLING AND SUBSEQUENT HEAT TREATMENT
(2022) Zaripova, M. M.; Isaenkova, M. G.; Fesenko, V. A.; Osintsev, A. V.; Исаенкова, Маргарита Геннадьевна; Фесенко, Владимир Александрович; Осинцев, Андрей Вениаминович
Currently, low-modulus biocompatible Ti – Nb – Zr alloys are considered promising for medical applications. Superelasticity is a property that is mainly governed by the crystallographic direction in single crystals, i.e. by the pre-dominant orientation of grains in polycrystalline objects. In order to control the crystallographic texture in products (such as foils), one should understand how it forms at various stages of thermomechanical processing. This paper compares the following alloys in terms of their crystallographic texture and how it forms: Ti –18Zr – 15Nb (18-15), Ti – 6Zr – 22Nb (22-6), Ti – 22Nb – (1–1.5)O (1O and 1.5O) (at.%). The composition of an alloy influences the stability of the initial β-phase, which tends to decrease with an increase in the concentration of Zr, which replaces Nb. A decreasing stability triggers mar-tensitic transformations during rolling resulting in the formation of a weak blurry texture {112}andlt;011andgt;, as can be observed during deformation of alloy 18-15. Plastic deformation of a stable β-phase leads to the formation of a sharp two-component texture typical of BCC alloys: {110}andlt;001andgt; and {112}andlt;011andgt;, which develops during the rolling of alloys with oxygen and 22-6. Recrystallization of rolled foils (Ɛ = 92%) at 650о C for 0.5 h leads to sharpening of the texture components in the case of samples with a sharp deformation texture (22-6, 1O, 1 .5O) and to a change in texture in the case of samples with a weak deformation texture (18-15). Cyclic tensile tests conducted in three different direc-tions revealed the presence of anisotropy in foils of all compositions. However, alloy 18-15 has the lowest anisotropy. An increase in the Zr concentration contributes to maximum reversible strain in the process of realizing superelas-ticity at room temperature. This research was funded by the Ministry of Science and Higher Education of the Russian Federation; Agreement No. 075-15-2021-1352. © 2022, Ore and Metals Publishing house. All rights reserved.
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Specific Features of High-Voltage Consolidation of Powders: Theoretical and Experimental Study
(2022) Grigoryev, E.; Abedi, M.; Moskovskikh, D.; Goltsev, V.; Osintsev, A.; Plotnikov, A.; Осинцев, Андрей Вениаминович
© 2022, The Minerals, Metals and Materials Society and ASM International.The fundamental aspects of the process of high-voltage consolidation of powder materials, as well as its advantages and limits, are discussed in this study. In this respect, the electrothermal processes at the contacts between powder particles (mesoscale), and also at the macroscale of the total volume of the consolidated sample, are investigated. Moreover, the dynamics of interparticle pore closure (collapse) in the consolidated material are calculated. The results of HVC experiments of difficult-to-sinter tungsten-based alloys are presented. The macro- and microstructure examinations of consolidated specimens, as well as stress-strain tests, are also evaluated. Compression tests show that all tested alloys can withstand compressive stress without failure at room temperature. In particular, a criterion for determining the range of technological variables for the fabrication of high-density samples is described. Finally, a promising future research area for this approach is proposed.
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Experimental investigation of the failure of steel AISI 316 by the methods of structural analyses
(2019) AbuGhazal, A. A.; Dzhumaev, P. S.; Osintsev, A. V.; Polsky, V. I.; Surin, V. I.; Джумаев, Павел Сергеевич; Осинцев, Андрей Вениаминович; Польский, Валерий Игоревич; Сурин, Виталий Иванович
The failure of reactor steel AISI 316 under tension was investigated by structural analysis and scanning contact potentiometry (SCP). In real time surface potentiograms were plotted by the change of which the growth of crack nucleus was tracked from its initiation till the stage of cup fracture formation. The nucleus of the microscopic crack on the potentiogram was first detected at the end of the next to the last cycle of testing at a load of 525 MPa in the yield region and then was persistently reproduced on potentiograms in subsequent tests up to the failure. The most noticeable changes in the parameters of dynamic waviness and roughness occurred at the moments of sharp crack growth. Using the results of the SCP method, three main stages of crack development were identified. In the first one, under loads corresponding to the conditional yield point, a nucleus was formed in the region of the maximum tangential stresses. This region of localization arises as a result of macroscopic loss of stability due to the significant mechanical energy accumulation by the system, which leads to an increase in the magnitudes of the plastic strain fluctuations. The second stage, the one of a progressive growth of the crack nucleus, is the longest in time and lasts from the moment of detection of the nucleus to the sample failure. The amplitude of the electrical potentials in the central part of the sample increased with the rise in intensity of the applied load which is associated with an increase in the inhomogeneity of the internal stress field around the nucleus, as well as the accelerating creep process and the growth of plastic strain in this region. At the pre-failure stage in the hardened surface layer, a macro-groove appears in the form of a standing deformation wave along the fracture line. Under the microscope, shear strain bands on the sample surface are also visible.
Только метаданные
DIAMETRAL COMPRESSION OF SHORT CYLINDERS WITH A CENTRAL HOLE AS A METHOD FOR ASSESSING THE TEAR RESISTANCE OF BRITTLE MATERIALS Диаметральное сжатие коротких цилиндров с центральным отверстием как метод оценки сопротивления разрыву хрупких материалов
(2023) Goltsev, V.; Osintsev, A. V.; Plotnikov, A. S.; Polskiy, V. I.; Осинцев, Андрей Вениаминович; Польский, Валерий Игоревич