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  1. No Access

    Article

    Effect of the Local Stress State on the Fracture Mechanism of Metallic Materials with Different Lattices under Single Loads

    The study discusses the effect of the local stress state at the crack tip on the fracture behavior of coarse- and ultrafine-grained bcc, fcc and hcp materials under single impact and static loads. The local st...

    G. V. Klevtsov, R. Z. Valiev, N. A. Klevtsova in Physical Mesomechanics (2023)

  2. No Access

    Article

    Determination of Fatigue Failure Parameters from the Depth of Plastic Zones Beneath the Fracture Surface

    Fatigue failure is the most common type of failure in aircrafts, motor vehicles, medical devices, and other engineering systems, and its study is crucial for predicting the service life of such systems. Of par...

    G. V. Klevtsov, L. R. Botvina, N. A. Klevtsova, R. Z. Valiev… in Physical Mesomechanics (2023)

  3. No Access

    Article

    Strength and Fracture Mechanism during Torsion of Ultrafine-Grained Austenitic Steel for Medical Applications

    The article considers evaluation of torsional strength and fracture of austenitic corrosion-resistant steel 08Kh18N9 with an ultrafine-grained (UFG) and coarse-grained (CG) structure, widely used in medicine f...

    G. V. Klevtsov, R. Z. Valiev, M. V. Fesenyuk, N. A. Klevtsova… in Steel in Translation (2021)

  4. No Access

    Article

    Local State of Stress of the Material at the Crack Tip for Various Types of Loading

    The parameter hmax/t (where hmax is the maximum depth of the plastic zone under the fracture surface, t is the specimen or part thickness) estimated by X-ray diffraction is shown to be used as a general criterion...

    G. V. Klevtsov, R. Z. Valiev, N. A. Klevtsova, A. M. Glezer… in Russian Metallurgy (Metally) (2021)

  5. No Access

    Article

    Influence of Ultrafine-Grained Structure on the Kinetics and Fatigue Failure Mechanism of VT6 Titanium Alloy

    The kinetics and mechanism of fatigue failure of the VT6 titanium alloy (composition, wt %: 5.95 V, 5.01 Al, 89.05 Ti) in the initial (hot-rolled) coarse-grained (CG) state and after equal-channel angular pres...

    G. V. Klevtsov, R. Z. Valiev, I. P. Semenova… in Russian Journal of Non-Ferrous Metals (2019)

  6. No Access

    Article

    The Strength and Fracture Mechanism of Unalloyed Medium-Carbon Steel with Ultrafine-Grained Structure under Single Loads

    This work is devoted to the study of the tensile strength, static crack resistance (К1С), and impact toughness of unalloyed medium-carbon (0.45% C) steel with ultrafine-grained (UFG) structure obtained by equal-c...

    G. V. Klevtsov, R. Z. Valiev, N. A. Klevtsova… in Physics of Metals and Metallography (2018)

  7. No Access

    Article

    Strength and Fracture Mechanisms of Nanostructured Metallic Materials Under Single Kinds of Loading

    The effect of nanostructuring on the strength and fracture mechanism of materials possessing different crystal lattices is analyzed on the basis of available reports and experimental data of the authors. The s...

    G. V. Klevtsov, R. Z. Valiev, N. A. Klevtsova… in Metal Science and Heat Treatment (2018)

  8. No Access

    Article

    Study of the Rate of Corrosion and Its Mechanisms in Aluminum Alloy after the Intense Torsional Plastic Deformation

    The research results concerning the rate and mechanism of corrosion in aluminum alloy 6201 of the Al–Mg–Si system in a NACE solution are presented. The alloy was studied in three states: after standard treatme...

    G. V. Klevtsov, M. Yu. Murashkin… in Protection of Metals and Physical Chemistr… (2017)

  9. No Access

    Article

    Investigation into the corrosion rate and features of the samples made of nanostructured aluminum alloy in the H2S-containing medium

    The corrosion rate was determined and corrosion damage features of the samples made of AK4-1 aluminum alloy were investigated in the NACE solution containing hydrogen sulfide (H2S). The alloy was investigated in ...

    G. V. Klevtsov, R. Z. Valiev, V. M. Kushnarenko… in Russian Journal of Non-Ferrous Metals (2017)

  10. No Access

    Article

    Structural strength and corrosion resistance of nanostructured steel 10

    The ultrafine-grain steel 10 obtained by equal-channel angular pressing at 200°C is investigated. The structural strength of the steel samples is analyzed, with tensile tests and assessment of the impact stren...

    R. Z. Valiev, G. V. Klevtsov, N. A. Klevtsova, V. M. Kushnarenko… in Steel in Translation (2014)

  11. No Access

    Article

    Local stressed state and failure micro-mechanisms of metallic materials with body-centered or face-centered cubic lattice

    Using as an example the broad class of materials with body-centered or face-centered cubic lattice, it is shown that the failure micro-mechanisms of metallic materials subjected to single-pass forms of loading...

    G. V. Klevtsov, L. R. Botvina, N. A. Klevtsova… in Metal Science and Heat Treatment (2010)

  12. No Access

    Article

    Influence of low temperatures on the fracture micromechanism of materials with bcc and fcc lattice structures under single loading conditions

    General regularities of the influence of the local stress state of a material on the plastic zone formation at the crack tip and the fracture micromechanism of materials with bcc and fcc lattice structures und...

    G. V. Klevtsov, N. A. Klevtsova in Bulletin of the Russian Academy of Sciences: Physics (2008)

  13. No Access

    Article

    On the relation between the local stress state of the material and the kinetics of development of plastic zones and the micromechanism of fracture under single loading acts

    G. V. Klevtsov, N. A. Klevtsova in Metal Science and Heat Treatment (2000)