A. I. Tyurin
Tambov State University
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Featured researches published by A. I. Tyurin.
Scripta Materialia | 2001
Yu. I. Golovin; V. I. Ivolgin; V. A. Khonik; Kazuo Kitagawa; A. I. Tyurin
The results of nanoindentation tests of bulk glassy Pd40Cu30Ni10P20 using a specially designed instrument with high time and spatial resolution are presented. Pronounced serrations of the indenter penetration depth are observed. The parameters of serrated flow (the number of serrations, their amplitude and duration) are dependent on the duration of the loading force pulse.
Journal of The Mechanical Behavior of Biomedical Materials | 2015
Maria A. Surmeneva; A. I. Tyurin; T.M. Mukhametkaliyev; T. S. Pirozhkova; I.A. Shuvarin; M.S. Syrtanov; Roman A. Surmenev
The structure, composition and morphology of a radio-frequency (RF) magnetron sputter-deposited dense nano-hydroxyapatite (HA) coating that was deposited on the surface of an AZ31 magnesium alloy were characterized using AFM, SEM, EDX and XRD. The results obtained from SEM and XRD experiments revealed that the bias applied during the deposition of the HA coating resulted in a decrease in the grain and crystallite size of the film having a crucial role in enhancing the mechanical properties of the fabricated biocomposites. A maximum hardness of 9.04 GPa was found for the HA coating, which was prepared using a bias of -50 V. The hardness of the HA film deposited on the grounded substrate (GS) was found to be 4.9 GPa. The elastic strain to failure (H/E) and the plastic deformation resistance (H(3)/E(2)) for an indentation depth of 50 nm for the HA coating fabricated at a bias of -50 V was found to increase by ~30% and ~74%, respectively, compared with the coating deposited at the GS holder. The nanoindentation tests demonstrated that all of the HA coatings increased the surface hardness on both the microscale and the nanoscale. Therefore, the results revealed that the films deposited on the surface of the AZ31 magnesium alloy at a negative substrate bias can significantly enhance the wear resistance of this resorbable alloy.
Technical Physics Letters | 2017
Yu. I. Golovin; A. I. Tyurin; D. Yu. Golovin; A. A. Samodurov
An electrothermal method of nondestructive inspection of conducting materials is proposed and tested experimentally. This method is based on filming the IR emission of the surface induced in a sheet sample excited by a millisecond current pulse. Subsequent computer processing of the nonstationary thermalfield patterns reveals millimeter and submillimeter defects and provides an opportunity to estimate their geometrical parameters and the temperature-diffusivity coefficient of the material.
Physics of the Solid State | 2017
Yu. I. Golovin; A. I. Tyurin; E. G. Aslanyan; T. S. Pirozhkova; V. M. Vasyukov
The size hardness effects are studied via the micro- and nanoindentation methods over the wide range of the depth of print h (from dozens of nanometers to several dozen micrometers) for several classes of materials, such as ionic and covalent single crystals (sapphire, silicon, lithium fluoride); metals (single-crystal Al, polycrystalline Cu, Ni, and Nb); ceramics (high-strength nanostructured TZP-ceramic based on the natural zirconium dioxide–baddeleyite mineral); amorphous materials (fused quartz); and polymers (polycarbonate and polytetrafluoroethylene). As is shown, some of them possess severe size hardness effects, whereas the others reveal the weak ones or even a lack of these effects. The thermoactivation analysis is implemented, as well, and the activating and energy characteristics of local deformation processes induced by an indenter are compared with the dominant plasticity micromechanisms of the studied materials at different stages of the print formation and with the size peculiarities. The materials with low hardness coefficients and meeting the requirements of ISО 14577 and GOST R 8.748-2011 standards in the nanohardness measurements are highlighted, as well. In the established load ranges, these materials are the promising candidates for their use as reference samples, which are designed to ensure the uniformity of the hardness measurements at the nano- and microscales, as well as for calibrating and testing the nanoindentometers.
Technical Physics Letters | 1997
Yu. I. Golovin; V. I. Ivolgin; V. V. Korenkov; A. I. Tyurin
A new method is described to determine the time-dependent elastoplastic and dissipative properties of solids in nanovolumes by recording the instantaneous values of the stress and depth of penetration of a rigid indenter. Measurements are also made of the energy W1 supplied to the indenter, the energy U dissipated in the insertion process, and the energy W0 returned to the indenter on unloading. Results of measurements of the dynamic microhardness and also of the energies W0 and U for NaCl crystals are presented as functions of the duration of contact between the indenter and the surface for times between 1 ms and 10 s.
Technical Physics Letters | 2017
Yu. I. Golovin; A. I. Tyurin; D. Yu. Golovin; A. A. Samodurov
A new method for nondestructive testing of coatings on exterior and interior surfaces of metal shells is proposed that is based on video monitoring of the infrared radiation emitted from the shell excited by shortterm external heating. Computer processing of the measured nonstationary field of temperature distribution on the outer surface allows defects with lateral dimensions on the order of or greater than the shell thickness to be revealed on the inner (inaccessible to observation) surface. Geometric characteristics of these defects can be evaluated.
Bulletin of The Russian Academy of Sciences: Physics | 2017
Yu. I. Golovin; A. I. Tyurin; S. D. Victorov; A. N. Kochanov; A. A. Samodurov; T. S. Pirozhkova
Size effects in the local mechanical properties of multiphase materials are studied by means of micro- and nanoindentation. The numerical values of the elasticity modulus, hardness, and crack resistance of single phases and interphase boundaries in several rock samples (polycrystalline banded iron formations, granite, anthracite, sandstone, marble, and serpentine marble) are determined. The strongest and weakest intergrowth boundaries in the investigated materials are established. Thermal activation analysis is performed, and the activation and energy characteristics of local deformation in a material under an indenter are identified. The predominant micromechanisms of plasticity in single phases and inclusions in rocks under the action of high local stresses are identified.
Crystallography Reports | 2005
Yu. I. Golovin; V. I. Ivolgin; A. I. Tyurin; S.V. Potapov; V. Z. Bengus; E. D. Tabachnikova
AbstractThe study is aimed at the establishment of regions of stable (monotonic) and unstable (jumpwise) plastic flow in bulk amorphous Zr46.8Ti8Cu7.5Ni10Be27.5 alloy under the conditions of local deformation. The characteristics of the jumpwise plastic flow in bulk amorphous Zr46.8Ti8Cu7.5Ni10Be27.5 alloy are studied by the method of continuous nanoindentation (depth-sensing testing) in the range of strain rates
Technical Physics | 2016
Maria A. Surmeneva; Roman A. Surmenev; A. I. Tyurin; T. S. Pirozhkova; I. A. Shuvarin
Technical Physics | 2000
Yu. I. Golovin; A. I. Tyurin; V. I. Ivolgin; V. V. Korenkov
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