V. V. Shpeizman

article

The Hall–Petch Relationship for the Sizes of Deformation Jumps in Metals

V. V. Shpeizman, P. N. Yakushev

Physics of the Solid State > 2019 > 61 > 7 > 1239-1245

The paper presents an attempt to use the Hall–Petch relationship to relate the yield strength of copper and titanium in three different states (initial, annealed, and after equal-channel angular pressing) to the sizes of nano- and micrometer deformation jumps measured using a precision interferometric technique. It is shown that, upon a compression strain near the yield point, one can observe six...

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Novel Oxide Coatings on Single-Crystal Sapphire and Sintered Ceramics

V. N. Gurin, V. M. Krymov, V. V. Shpeizman, A. B. Sinani, more

Technical Physics Letters > 2018 > 44 > 10 > 881-883

The formation of the protective and hardening oxide coatings on the surface of the single-crystal sapphire and sintered corundum (ceramics) is studied. Corundum systems with oxide coatings are as yet unknown and our studies are original. The compositions of the coating based on the mixture of Al₂O₃ and B₂O₃ oxides and a technique of their deposition on the samples are worked out. The strength of the...

article

The Sizes of Jumps and Levels of Deformation of Metals

V. V. Shpeizman

Technical Physics Letters > 2018 > 44 > 8 > 691-693

It is proposed to characterize levels of deformation by a size of its jumps, which can be observed when the strain rate is accurately measured in experiments with load that is constant or defined according a certain law. At the micro- and nanometer scales, the strain rate was measured and the deformation jumps were computed for copper, lead, and tin using a precision interferometric method. A correlation...

article

Regularities of Microstrain of Ultrahigh-Molecular-Weight Polyethylene Modified with Halloysite Additives

V. V. Shpeizman, P. N. Yakushev, V. M. Egorov, S. V. Vasil’eva, more

Physics of the Solid State > 2018 > 60 > 7 > 1351-1357

The effect of additives of 1 and 3 wt % of halloysite on the rate and small jumps of deformation under uniaxial compression of ultrahigh-molecular-weight polyethylene was investigated. A procedure for precision interference measurement with a resolution of 325 nm for displacement and 1 kHz for frequency enabled the detection of several levels of deformation in the micro- and nanometer ranges. The...

article

Microhardness of armco iron samples with different initial structures after rolling in a helium or nitrogen medium

O. V. Klyavin, N. N. Aruev, L. I. Derkachenko, Yu. M. Chernov, more

Technical Physics > 2017 > 62 > 11 > 1758-1760

We have analyzed the dependences of microhardness H on load P for the surface layers of Armco iron samples with different initial structures, i.e., annealed and after equal-channel angular pressing (ECAP). The microhardness was measured in air after rolling of the sample in helium or nitrogen medium. It has been found that these mediums produce different effects on the H(P) dependences for preliminarily...

article

Effect of γ-radiation on the strain characteristics of a high-filled wood-plastic composite

V. V. Shpeizman, P. N. Yakushev, S. A. Tokovoi, A. S. Smolyanskii

Physics of the Solid State > 2017 > 59 > 4 > 808-814

The strain rate and the characteristics of the jumps at micro- and nanolevels were measured by the high-precision interferometric method for a wood-plastic composite irradiated to doses of 0–100 kGy. Radiation was shown to strengthen the material and change the characteristics of strain rate and value jumps. Strain jumps and mean-square deviations of the measured strain rate from its smoothened time...

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Effect of activation on the porous structure and the strain and strength properties of beech wood biocarbon

V. V. Shpeizman, T. S. Orlova, A. A. Spitsyn, D. A. Ponomarev, more

Physics of the Solid State > 2017 > 59 > 1 > 114-119

The effect of activation on the size, specific volume, and surface area of pores in a monolithic biomorphic material obtained by carbonization of beech wood is studied. It is shown that under optimal activation mode with a steam heated to 970°C, the total pore volume and surface, determined by adsorption curves, increased by 20 and 18 times, respectively. With the use of high-precision interferometric...

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Strength and microplasticity of biocarbons prepared by carbonization in the presence of a catalyst

V. V. Shpeizman, T. S. Orlova, B. I. Smirnov, A. Gutierrez-Pardo, more

Physics of the Solid State > 2016 > 58 > 4 > 703-710

The microdeformation has been investigated under uniaxial compression of beech-derived biocarbons partially graphitized during carbonization in the presence of a Ni- or Fe-containing catalyst. The strength and ultimate fracture strain have been determined at different temperatures of carbonization of the samples in the absence or in the presence of a catalyst. It has been shown using high-precision...

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Effect of the gaseous medium in the process of rolling on the microhardness of aluminum and iron

O. V. Klyavin, N. N. Aruev, L. I. Derkachenko, V. Yu. Fedorov, more

Physics of the Solid State > 2016 > 58 > 4 > 711-715

The load dependence of the microhardness of polycrystalline aluminum and iron specimens produced by rolling in a nitrogen, helium, or air medium has been investigated. It has been found that nitrogen and helium have different effects on the microhardness of these metals in the low-load range. This difference is associated with the specific features in the intensity of dynamic penetration of nitrogen...

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Effect of ultrasound on the characteristics of superplastic deformation

M. M. Myshlyaev, V. V. Shpeizman, V. V. Klubovich, M. M. Kulak, more

Doklady Physics > 2015 > 60 > 12 > 539-541

The deformation of aluminum–lithium alloy 1420 is investigated in the region of temperatures of its superplasticity T = 320–395°C under the simultaneous action of stretching load and axial ultrasonic vibrations. The estimates of the activation parameters of deformation show that the activation energy of deformation during stretching with ultrasonic vibrations and without them are close both at the...

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Change in characteristics of superplastic deformation of the aluminum–lithium alloy under the effect of ultrasonic vibrations

M. M. Myshlyaev, V. V. Shpeizman, V. V. Klubovich, M. M. Kulak, more

Physics of the Solid State > 2015 > 57 > 10 > 2039-2044

The tension of samples of aluminum–lithium alloy 1420 in the superplasticity temperature region T = 320–395°C and the influence of ultrasonic vibrations on deformation characteristics have been investigated. It has been shown that the effect of ultrasound manifests itself in a decrease in resistance to deformation and an increase in total strain. The tension curves plotted in the coordinates true...

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Effect of dynamic diffusion of air, nitrogen, and helium gaseous media on the microhardness of ionic crystals with juvenile surfaces

O. V. Klyavin, V. Yu. Fedorov, Yu. M. Chernov, V. V. Shpeizman

Physics of the Solid State > 2015 > 57 > 9 > 1800-1806

The load dependences of the microhardness of surface layers of NaCl and LiF ionic single crystals with juvenile surfaces and surfaces exposed to air for a long time measured in the air, nitrogen, and helium gaseous media have been investigated. It has been found that there is a change in the sign of the derivative of the microhardness as a function of the load for LiF crystals indented in helium and...

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Use of the helium medium for preparation of nano-sized powder materials by the example of industrial cement

O. V. Klyavin, N. N. Aruev, B. S. Boltenkov, A. O. Pozdnyakov, more

Physics of the Solid State > 2014 > 56 > 2 > 330-334

Based on the phenomenon of the mechanodynamic diffusion of particles of the external medium in solids, a new in principle method has been proposed for the first time for producing nano-sized powder materials using industrial cement milled in a helium medium as an example. The temperature dependences of the extraction rate and the amount of helium in powders upon their heating in a temperature range...

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Structure, microhardness, and strength of a directionally crystallized Al-Ge alloy

L. I. Derkachenko, B. N. Korchunov, S. P. Nikanorov, V. N. Osipov, more

Physics of the Solid State > 2014 > 56 > 3 > 527-530

The structure, microhardness, and strength of binary directionally crystallized aluminum alloys with 35, 43, 53, 57, and 64 wt % germanium have been investigated. It has been shown that the eutectic microhardness is constant in the composition region under study. The microstrength of primary crystals of the solid solution of germanium in aluminum with the dendrite structure increases with increasing...

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Investigation of the energy-saving process of cement dispersion in a helium atmosphere

O. V. Klyavin, N. N. Aruev, Yu. M. Chernov, A. S. Drinberg, more

Physics of the Solid State > 2014 > 56 > 6 > 1177-1179

The process of commercial cement grinding in a helium atmosphere has been investigated in comparison with the process in an air atmosphere. Raw material particles have been sorted by sizes. Curves of helium release from the raw material after its grinding in air and in helium in the temperature range T = 20–1200°C have been constructed and analyzed. The influence of the character of water molecule...

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Influence of the load sign on characteristics of micro- and nanoscale steps in strain rate of γ-irradiated polytetrafluoroethylene

V. V. Shpeizman, P. N. Yakushev, L. I. Trakhtenberg, A. S. Smolyanskii

Physics of the Solid State > 2014 > 56 > 12 > 2485-2492

Precision measurements of the strain rate were performed for the first time by laser Doppler deformometry in the mode of uniaxial tension of polytetrafluoroethylene (PTFE) samples unirradiated and exposed to ⁶⁰Co γ-radiation to a dose of 30 kGy at room temperature in air. The results of deformation tests of initial and γ-irradiated PTFE samples under tension and compression were compared. The trend...

article

Effect of carbonization temperature on the microplasticity of wood-derived biocarbon

V. V. Shpeizman, T. S. Orlova, B. K. Kardashev, B. I. Smirnov, more

Physics of the Solid State > 2014 > 56 > 3 > 538-545

The uniaxial compression strength under stepped loading and the 325-nm-stepped deformation rate of biocarbon samples obtained by carbonization of beech wood at different temperatures in the 600–1600°C range have been measured using high-precision interferometry. It has been shown that the strength depends on the content of nanocrystalline phase in biocarbon. The magnitude of deformation jumps at micro-...

article

Effect of a weak magnetic field on stepwise deformation of lead in the large strain region

V. V. Shpeizman, P. N. Yakushev

Physics of the Solid State > 2013 > 55 > 9 > 1878-1883

Precision measurements of the strain rate of lead at constant stresses in a magnetic field and without field and changes in the strain rate resulting from field turn-on and -off have been performed by the interferometric method. It has been shown that the entire stress-strain curve in the field and without field consists of steps of different amplitudes and lengths: from several tens of nanometers...

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Mechanodynamic diffusion of nitrogen molecules into armco-iron under its deformation in liquid nitrogen medium

O. V. Klyavin, V. I. Nikolaev, O. F. Pozdnyakov, B. I. Smirnov, more

Bulletin of the Russian Academy of Sciences: Physics > 2009 > 73 > 10 > 1416-1418

Data on mechanodynamic penetration of nitrogen molecules are obtained under deformation of armco-iron samples. It is shown that molecular nitrogen diffuses into the surface layer of samples under their deformation in a liquid nitrogen medium, and the nitrogen concentration compares well with the helium concentration in samples deformed in a liquid helium medium and in some cases exceeds the latter.

article

Evolution of nanoscale nonuniformities under deformation of irradiated Plexiglas

N. N. Peschanskaya, V. V. Shpeizman, P. N. Yakushev, A. S. Smolyanskii, more

Bulletin of the Russian Academy of Sciences: Physics > 2009 > 73 > 10 > 1427-1430

The example of Plexiglas irradiated with γ radiation to the dose of D = 330 kGy is used to demonstrate the presence of minor deformation jumps. Deformation levels are determined by deformation jumps values measured by the interferometric technique. These results support the position on the existence of domains from nanometers to tens of nanometers in size within amorphous polymers and allow one to...

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Search results for: V. V. Shpeizman

The Hall–Petch Relationship for the Sizes of Deformation Jumps in Metals

Novel Oxide Coatings on Single-Crystal Sapphire and Sintered Ceramics

The Sizes of Jumps and Levels of Deformation of Metals

Regularities of Microstrain of Ultrahigh-Molecular-Weight Polyethylene Modified with Halloysite Additives

Microhardness of armco iron samples with different initial structures after rolling in a helium or nitrogen medium

Effect of γ-radiation on the strain characteristics of a high-filled wood-plastic composite

Effect of activation on the porous structure and the strain and strength properties of beech wood biocarbon

Strength and microplasticity of biocarbons prepared by carbonization in the presence of a catalyst

Effect of the gaseous medium in the process of rolling on the microhardness of aluminum and iron

Effect of ultrasound on the characteristics of superplastic deformation

Change in characteristics of superplastic deformation of the aluminum–lithium alloy under the effect of ultrasonic vibrations

Effect of dynamic diffusion of air, nitrogen, and helium gaseous media on the microhardness of ionic crystals with juvenile surfaces

Use of the helium medium for preparation of nano-sized powder materials by the example of industrial cement

Structure, microhardness, and strength of a directionally crystallized Al-Ge alloy

Investigation of the energy-saving process of cement dispersion in a helium atmosphere

Influence of the load sign on characteristics of micro- and nanoscale steps in strain rate of γ-irradiated polytetrafluoroethylene

Effect of carbonization temperature on the microplasticity of wood-derived biocarbon

Effect of a weak magnetic field on stepwise deformation of lead in the large strain region

Mechanodynamic diffusion of nitrogen molecules into armco-iron under its deformation in liquid nitrogen medium

Evolution of nanoscale nonuniformities under deformation of irradiated Plexiglas

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