Current issue

Phase diargamm for a system with competing ferromagnetic and antiferromagnetic interactions.

The study of phase transition in systems with the competing interactions in a magnetic field by computer modeling

S.V. Belim

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 5-9

Journal section: Theory and computer simulations in materials science and condensed matter physics

Scanning probe microscopy of the surface of the working portion of the samples after superplasticity deformation at a temperature of 550°C.

Low-temperature superplasticity of VT22 titanium alloy

E.Y. Klassman, V.V. Astanin

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 10-15

Journal section: Structure design and analysis

Relationship of the t/(K1C/σ0.2)2 and hmax/t criteria for materials in the bcc lattice (dark dots), fcc lattice (light dots) and hcp lattice (combined dots) in CG state (1-4, 7-9, 11, 14) and also in the UFG state (5, 6, 10, 12, 13, 15). The vertical line meets the criterion t/(K1C/σ0.2)2 ≥ 2.5.
1 – С20; 2 – С40; 3 – Fe-0.15C-2Cr-1Mo-1V; 4 – 9MnSi5; 5 – С45 (ECAP); 6 - 9MnSi5 (ECAP); 7 – ENAW-2024; 8 – Fe-0.03C-13Cr-0.1N-19Mn; 9 – ENAW-2618A; 10 – ENAW-2618A (ECAP); 11 – Ti-6Al-4V; 12 – Ti-6Al-4V (ECAP); 13 – Ti-6Al-4V (ECAP + IS); 14 – Ti-6Al-4Mo; 15 – Ti-6Al-4Mo (HR)

Local stress state of materials with an hcp lattice and plastic zones under the fracture surface

G.V. Klevtsov, R.Z. Valiev, N.A. Klevtsova, I.P. Semenova, I.N. Pigaleva, M.L. Linderov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 16-21

Journal section: Mechanical and physical properties of materials

A model of the deformation of a polymer composite material based on the sequential breaking of fibers has been developed.

Features of the deformation of glass- and carbon-reinforced plastics based on T-107 binder under tension

Y.E. Kalinin, O.A. Karaeva, A.T. Kosilov, A.M. Kudrin, O.V. Ovdak

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 22-26

Journal section: Mechanical and physical properties of materials

The deformation structural transition is the transition of the material structure to the state of anomalous plasticity as a result of the combined action of thermal fluctuations, static displacements and dynamic oscillatory displacements of standing sound waves formed on natural resonators in the localization of the deformation of the sample

Accumulation of deformation and acoustic emission in aluminum-magnesium alloy AMg6 in the conditions of deformation of the structural transition

S.V. Makarov, V.A. Plotnikov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 27-32

Journal section: Mechanical and physical properties of materials

The paper presents the results of computer simulation using the molecular dynamics method of synthesizing binary Cu-Au nanoclusters by condensation from a gaseous phase. For the analysis, we selected the initial configurations of different chemical composition Cu3Au, Cu-Au, Cu90Au10, Cu60Au40 which were cooled with liquid nitrogen in the condensation process. Accord-ing to the simulation results, a relationship was found between the number of clusters formed at the first stage of synthesis and the percentage of gold atoms in the primary gaseous medium.

Analysis of the size distribution of binary Cu-Au nanoparticles during synthesis from a gaseous medium

Y.Y. Gafner, S.L. Gafner, Z.V. Golovenko

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 33-37

Journal section: Theory and computer simulations in materials science and condensed matter physics

The laws governing the development of localization of plastic deformation under the conditions of manifestation of the effect of space-time heterogeneity (Portevin-Le Chatelier effect) are investigated. The deformation diagram of an aluminum alloy, illustrates the multiple fluctuations of the flow stress, which detect qualitatively excellent dynamics in different parts of the deformation curve. Statistical distributions of the intervals between the plastic flow stress fluctuations were analyzed, and two critical points were found that indicate a change in the mechanisms of plastic deformation.

Statistical patterns of deformation localization during plastic flow in the AMg6 alloy

D.V. Efremov, S.V. Uvarov, L.V. Spivak, O.B. Naimark

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 38-42

Journal section: Mechanical and physical properties of materials

It has been established that under shear deformation during SHS extrusion, the modification of Ti – B – Fe with small additions of nano-sized aluminum nitride powder leads to the refinement of the grain structure of the material. As a result of a decrease in the grain of the main phase, the microhardness of the material increases, on average, by 10%.

The effect of aluminum nitride nanoparticles on the structure, phase composition and properties of materials of the Ti-B-Fe system obtained by SHS-extrusion

A.V. Bolotskaia, M.V. Mikheev, P.M. Bazhin, A.M. Stolin

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 43-47

Journal section: Structure design and analysis

Problems of forming the mechanical characteristics of sheet metal from the widely used steel 10G2FB.

Study of the crystallographic texture of pipe steel

B.S. Ermakov, A.A. Alhimenko, N.O. Shaposhnikov, A.S. Tsvetkov, A.V. Shirokov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 48-53

Journal section: Structure design and analysis

Ti-40wt.% Nb alloy in UFG state (structural elements’ average size is 0.28 μm) has multiphase structure, which is represented by β-subgrains, dispersive-strengthened with nanoparticles of nanosized ω-phase, and α-subgrains. Annealing temperature range of 773-973 K is characterized by transformation of alloy’s structure from ultrafingerained state into finegrained, active growth of dispersive-strengthened β-phase’s grains size and significant decrease of microhardness. Transformation occurs according to the α→β scheme.

Microstructure of ultrafine-grained Ti-40 wt.% Nb alloy after annealing

A.Y. Eroshenko, Y.P. Sharkeev, M.A. Khimich, I.A. Glukhov, P.V. Uvarkin, A.I. Tolmachev, A.M. Mairambekova

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 54-59

Journal section: Structure design and analysis

The effect of hardness on the wear resistance of Ti-Al coatings is exponential, and is consistent with the Arсhard model.

Properties of Ti-Al intermetallic coatings obtained by electrospark processing in a mixture of Ti and Al granules

A.A. Burkov, M.A. Kulik

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 60-65

Journal section: Mechanical and physical properties of materials

Spherical particles extracted from the brass cathode (a) and the distribution map of elements (iron - (b), copper - (c), zinc - (d)), showing the dominance of iron in the particles

Transmutation of a part of the extracted material of brass electrodes with pulses of electric current in an aqueous solution of NaCl

M.P. Kashchenko, V.F. Balakirev, N.M. Kashchenko, M.B. Smirnov, Y.L. Chepelev, V.V. Ilyushin, N.V. Nikolaeva, V.G. Pushin

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 66-71

Journal section: Theory and computer simulations in materials science and condensed matter physics

The structure of CaCu3Ti4O12 equivalent circuit reveals three processes possible within the material – reach-through conductivity and two overlapping polarization processes – electronic and dipole relaxation ones. Temperature dependencies of specific conductivity in the Arrhenius scale for CaCu3Ti4O12 samples of different thicknesses are linear and characterized by activation energy of 1.05 eV. Temperature dependencies of electric parameters of samples are at their minimums at T = 350 C, which can be explained by the changed polarization mechanism.

Impedance spectroscopy of СaCu3Ti4O12

N.A. Sekushin, L.A. Koksharova, N.A. Zhuk

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 72-77

Journal section: Experimental methods in materials research

The superelasticity at stress-induced α–γ'-martensitic transformation at room temperature in compression was 6.2 % and 5 % in [001]-oriented Fe43.5Mn34Al15Ni7.5 (at. %) single crystals and Fe42.5Mn34Al15Ni7.5Ti1 (at.%) oligocrystals, respectively. Single crystals exhibited good stability of superelasticity in isothermal loading/unloading cycles, in contrast to oligocrystals.

Superelasticity and its cyclic stability in [001]-oriented single crystals and oligocrystals of FeMnAlNi alloy in compression

V.V. Poklonov, I.V. Kuksgauzen, Y.I. Chumlyakov, D.A. Kuksgauzen, V.A. Kirillov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 78-82

Journal section: Mechanical and physical properties of materials

Solid solution «amorphisation» is observed at heating in the temperature range corresponding to α-γ transformation (920-960°C). Amorphous-like material state is retained both at subsequent heating (to 1060 °C) and cooling (to 20 °С), which is super-stable compared to the established metallic glasses.

Solid state amorphization in a thin Fe-Si-Mg-O surface film triggered by the reduction of elements from oxides in the temperature range of the α-γ transformation

M.L. Lobanov, A.S. Yurovskikh, P.L. Reznik, N.N. Nikul’chenkov, G.M. Rusakov, A.A. Redikul’tsev

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 83-88

Journal section: Structure design and analysis

Presence of vacancy edge defect can be detected by the intense 2D band in the Raman spectrum

Influence of edge defects on Raman spectra of graphene

G.N. Ten, A.Y. Gerasimenko, M.S. Savelyev, A.V. Kuksin, P.N. Vasilevsky, E.P. Kitsyuk, V.I. Baranov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 89-93

Journal section: Structure design and analysis

Grain size does not affect the diffusible hydrogen concentration in both pure magnesium and the alloy MA14.

Effect of grain size on mechanical properties and hydrogen occluding capacity of pure magnesium and alloy MA14 subjected to stress-corrosion cracking

E.D. Merson, V.A. Poluyanov, P.N. Myagkikh, D.L. Merson, A.Y. Vinogradov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 94-99

Journal section: Mechanical and physical properties of materials

Fine-grained (top figures) and ultrafine-grained (bottom figures) microstructure of superalloy EP741NP after superplastic deformation.

Effect of hot forging on the microstructure and superplastic properties of the powder nickel base superalloy EP741NP

A.A. Ganeev, V.A. Valitov, M.I. Nagimov, V.M. Imayev

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 100-105

Journal section: Structure design and analysis

The graphs of the dependences of heat resistance on the Larson-Miller parameter have the form characteristic of all the alloys studied, but for each melting composition there are individual characteristics. The calculated and experimental values of heat resistance have satisfactory convergence.

Modeling of changes in heat resistance of nickel-based alloys using Bayesian artificial neural networks

O.V. Anoshina, A.S. Trubnikova, O.B. Milder, D.A. Tarasov, A.A. Ganeev, A.G. Tyagunov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 106-111

Journal section: Theory and computer simulations in materials science and condensed matter physics

$With a free upsetting of the Cu-0.6Cr alloy by ≈90% (е≈2.0), a decrease in the cooling rate of the material leads to an increase in the fraction of mid-angle boundaries and a decrease in the fraction of high-angle boundaries, primarily due to a decrease in the number of twin boundaries.$

Structural changes of the Cu-0.6Cr alloy upon cooling at different rates after a large high-temperature deformation

D.A. Aksenov, G.I. Raab, R.N. Asfandiyarov

PDF Article

Year: 2020

Volume: 10 Issue: 1

Pages: 112-117

Journal section: Structure design and analysis

Current issue

The study of phase transition in systems with the competing interactions in a magnetic field by computer modeling

Low-temperature superplasticity of VT22 titanium alloy

Local stress state of materials with an hcp lattice and plastic zones under the fracture surface

Features of the deformation of glass- and carbon-reinforced plastics based on T-107 binder under tension

Accumulation of deformation and acoustic emission in aluminum-magnesium alloy AMg6 in the conditions of deformation of the structural transition

Analysis of the size distribution of binary Cu-Au nanoparticles during synthesis from a gaseous medium

Statistical patterns of deformation localization during plastic flow in the AMg6 alloy

The effect of aluminum nitride nanoparticles on the structure, phase composition and properties of materials of the Ti-B-Fe system obtained by SHS-extrusion

Study of the crystallographic texture of pipe steel

Microstructure of ultrafine-grained Ti-40 wt.% Nb alloy after annealing

Properties of Ti-Al intermetallic coatings obtained by electrospark processing in a mixture of Ti and Al granules

Transmutation of a part of the extracted material of brass electrodes with pulses of electric current in an aqueous solution of NaCl

Impedance spectroscopy of СaCu3Ti4O12

Superelasticity and its cyclic stability in [001]-oriented single crystals and oligocrystals of FeMnAlNi alloy in compression

Solid state amorphization in a thin Fe-Si-Mg-O surface film triggered by the reduction of elements from oxides in the temperature range of the α-γ transformation

Influence of edge defects on Raman spectra of graphene

Effect of grain size on mechanical properties and hydrogen occluding capacity of pure magnesium and alloy MA14 subjected to stress-corrosion cracking

Effect of hot forging on the microstructure and superplastic properties of the powder nickel base superalloy EP741NP

Modeling of changes in heat resistance of nickel-based alloys using Bayesian artificial neural networks

Structural changes of the Cu-0.6Cr alloy upon cooling at different rates after a large high-temperature deformation

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