А. Yu. Ivannikov
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View article: Estimation of radiation doses of population residing nearby area of uranium ore mining and processing in Kazakhstan by tooth enamel EPR spectroscopy
Estimation of radiation doses of population residing nearby area of uranium ore mining and processing in Kazakhstan by tooth enamel EPR spectroscopy Open
To assess the impact of natural and technogenic radioactivity in uranium mining enterprises on the population, an investigation by the tooth enamel EPR (Electron Paramagnetic Resonance) dosimetry method was conducted for a group of the pop…
View article: Recent development in powder metallurgy of high-entropy alloys for high-temperature applications: Brief review
Recent development in powder metallurgy of high-entropy alloys for high-temperature applications: Brief review Open
Powder metallurgy of high-entropy alloys has gained significant attention in modern applications due to its low cost and near-net-shape formability. This overview presents the state-of-the-art research on powder metallurgy of high-entropy…
View article: Dosimetric Examination by the Tooth Enamel EPR Spectroscopy Method of the Population of Stepnogorsk City, a Region of Uranium Ore Mining and Processing in Kazakhstan
Dosimetric Examination by the Tooth Enamel EPR Spectroscopy Method of the Population of Stepnogorsk City, a Region of Uranium Ore Mining and Processing in Kazakhstan Open
View article: Effect of silver and heat treatment on properties of 03Kh17N10M2 austenitic steel wire
Effect of silver and heat treatment on properties of 03Kh17N10M2 austenitic steel wire Open
The article examines the influence of various heat treatments, their temperature, as well as silver alloying on mechanical properties, phase composition and structure of steel wire from chromium-nickel-molybdenum austenitic stainless steel…
View article: Interaction of SiC with Al2O3−(t + m)ZrO2(Y2O3) Oxide Composition
Interaction of SiC with Al2O3−(t + m)ZrO2(Y2O3) Oxide Composition Open
We employed contact alloying in the range 1000–1860°С to study the reaction specifics between SiC and Al2O3−(t + m)ZrO2(Y2O3) oxide composition. Real-time experiments with photographic recording of the changing size and shape of the Al2O3−…
View article: Investigation of spherical powder obtained by plasma spraying of wire from corrosion-resistant steel 03Kh17N10M2
Investigation of spherical powder obtained by plasma spraying of wire from corrosion-resistant steel 03Kh17N10M2 Open
At present, powder with spherical particles from corrosion-resistant steels is used in such widespread additive methods as selective laser melting, selective laser sintering, direct laser sintering, electron beam melting, and others. Each …
View article: Study of the structure and mechanical properties of 316L steel plates modified with 0.2% and 0.5% Ag
Study of the structure and mechanical properties of 316L steel plates modified with 0.2% and 0.5% Ag Open
In this work, the effect of adding 0.2% and 0.5% Ag on the structure and mechanical properties of 316L steel plates was studied. Smelting and homogenization annealing was carried out in a vacuum furnace. Plates 1±0.1 mm thick were obtained…
View article: Investigation of Antibacterial Properties of Corrosion-Resistant 316L Steel Alloyed with 0.2 wt.% and 0.5 wt.% Ag
Investigation of Antibacterial Properties of Corrosion-Resistant 316L Steel Alloyed with 0.2 wt.% and 0.5 wt.% Ag Open
The article is devoted to the study of melted ingots, plates rolled from them, and the resulting spherical powder made of corrosion-resistant 316L steel with the addition of 0.2 wt.% and 0.5 wt.% Ag. The study of antibacterial properties, …
View article: Preparation and Investigation of Spherical Powder Made from Corrosion-Resistant 316L Steel with the Addition of 0.2% and 0.5% Ag
Preparation and Investigation of Spherical Powder Made from Corrosion-Resistant 316L Steel with the Addition of 0.2% and 0.5% Ag Open
The paper describes the production and study of spherical powder made from corrosion-resistant 316L steel with the addition of 0.2% and 0.5% Ag. The study of granulometric composition, morphology, fluidity and bulk density, phase compositi…
View article: Fabrication, Microstructure, and Physico-Mechanical Properties of Fe–Cr–Ni–Mo–W High-Entropy Alloys from Elemental Powders
Fabrication, Microstructure, and Physico-Mechanical Properties of Fe–Cr–Ni–Mo–W High-Entropy Alloys from Elemental Powders Open
In this work, 35Fe30Cr20Ni10Mo5W (wt.%) and 30Fe30Cr20Ni10Mo10W (wt.%) high-entropy alloys were fabricated using a powder metallurgy route. Powder mixtures for a hot-pressure process were obtained by the mixing and mechanical alloying of e…
View article: Features of Changes in the Surface Structure and Phase Composition of the of α + β Titanium Alloy after Electromechanical and Thermal Treatment
Features of Changes in the Surface Structure and Phase Composition of the of α + β Titanium Alloy after Electromechanical and Thermal Treatment Open
Changes of structure, phase composition and microhardness in high-strength α + β titanium alloy were investigated after electromechanical treatment (EMT) and subsequent aging. The EMT was performed with alternating current density (j of 30…
View article: Tooth enamel ESR dosimetry for Hiroshima ‘black rain’ zone residents
Tooth enamel ESR dosimetry for Hiroshima ‘black rain’ zone residents Open
Electron spin resonance (ESR) dosimetry was applied to human tooth enamel in order to obtain individual absorbed doses for victims of the Hiroshima bomb who lived in the ‘black rain’ area. The so-called ‘black rain’ fell in the form of pre…
View article: Коррозионностойкие стали в аддитивном производстве
Коррозионностойкие стали в аддитивном производстве Open
This review discusses the main methods for producing spherical powder particles of corrosion-resistant steels as a material widely used in all industries. Also the examples of products made by modern additive methods are described. Current…
View article: Effect of heat treatment on the mechanical properties of stainless steel wire
Effect of heat treatment on the mechanical properties of stainless steel wire Open
The article is devoted to the study of the mechanical properties of austenitic stainless steel wire with a diameter of 1 mm after heat treatment. Mechanical properties were tested: strength and ductility of hardened and normalized stainles…
View article: Investigation of the structure and mechanical properties of stainless steel alloyed with silver
Investigation of the structure and mechanical properties of stainless steel alloyed with silver Open
The paper contains information of the development of technology for smelting stainless steel for application in the manufacture of medical devices. Smelting was carried out in electric arc vacuum furnaces. The technology has been developed…
View article: The plasma atomization process for the Ti-Al-V powder production
The plasma atomization process for the Ti-Al-V powder production Open
The paper presents brief information on the characteristics of the spherical powder of the Ti-Al-V alloy, produced by the method of plasma atomization of the wire. The scheme of the equipment and the results of studying the powder of the T…
View article: Mathematical modeling of the stress state in the coating during the electromechanical treatment
Mathematical modeling of the stress state in the coating during the electromechanical treatment Open
The principal aim of this study is to determine the stress state in the thermal sprayed coating during the electromechanical treatment. The solution is performed using the finite difference method. Lode-Nadai coefficient and Bagmutov param…
View article: The Influence of the Highly Concentrated Energy Treatments on the Structure and Properties of Medium Carbon Steel
The Influence of the Highly Concentrated Energy Treatments on the Structure and Properties of Medium Carbon Steel Open
This paper describes the effects of combination of electromechanical and ultrasonic treatment on the wear and corrosion behavior of carbon steel AISI 1045. It is shown that the wear resistance of carbon steel AISI 1045 can be improved cons…
View article: Characterization of spherical stainless steel powders prepared by electric arc spraying process
Characterization of spherical stainless steel powders prepared by electric arc spraying process Open
Spherical powders were obtained by electric arc spraying of stainless-steel wire. The effect of the electrical power during the arc spraying process was investigated. The fractional composition of the obtained powder was determined by lase…
View article: Numerical solution of stress-strain state during electromechanical treatment of plasma sprayed coatings
Numerical solution of stress-strain state during electromechanical treatment of plasma sprayed coatings Open
The principal aim of this study was to determine the distribution patterns of the stress-strain state at different times. The solution was performed using the finite difference method. The main results were presented depending on the time …
View article: The effect of homogenizing annealing on the microstructure and microhardness of Ti-20Nb-(7.5-10)Ta alloys (at.%)
The effect of homogenizing annealing on the microstructure and microhardness of Ti-20Nb-(7.5-10)Ta alloys (at.%) Open
The microstructure and microhardness of Ti-20Nb-7.5Ta and Ti-20Nb-10Ta alloys (at. %) after smelting and after homogenizing annealing at 900°C and 950°C for 12 hours were studied. It was shown that, after smelting, the alloys have a dendri…
View article: Research and development of the inert gas atomization of the wire by means of arc spraying
Research and development of the inert gas atomization of the wire by means of arc spraying Open
The paper presents brief information on the theory and technology of electric arc wire spraying. The construction for spraying of four groups of wire materials is shown. Carbon and stainless steel, pure copper and titanium wires were atomi…
View article: Research of nickel-based coatings erosion-corrosion wear
Research of nickel-based coatings erosion-corrosion wear Open
This article demonstrates the results of testing a nickel-based coating deposited by plasma spraying. According to the criterion of the relative volumetric wear rate, samples were compared at different concentrations of abrasive, impact an…
View article: Synthesis the composites Si<sub>3</sub>N<sub>4</sub>-TiN by hot pressing
Synthesis the composites Si<sub>3</sub>N<sub>4</sub>-TiN by hot pressing Open
The Si3N4-TiN composites were obtained by hot pressing at 1600–1800 °C in a nitrogen atmosphere from mixtures of powders of silicon nitride and metallic titanium. The influence of particle morphology, Ti content in the initial charge and s…
View article: Elastic properties of the plasma sprayed Ni coating after the electromechanical treatment
Elastic properties of the plasma sprayed Ni coating after the electromechanical treatment Open
The principal aim of this study was to evaluate the effect of the electromechanical treatment (EMT) on the elastic properties of the air plasma sprayed coating from Ni powder. During the EMT process the boundaries of the splats welded and …
View article: Cermet plasma coating TiC-Cr<sub>3</sub>C<sub>2</sub>-NiCr-MoC
Cermet plasma coating TiC-Cr<sub>3</sub>C<sub>2</sub>-NiCr-MoC Open
The paper presents data on the effect of modes of plasma spraying on the concentration levels of carbon, oxygen, nitrogen in the TIC-Cr3C2-NiCr-Mo-C coating. It is determined that the microhardness of the coating reaches 27.1 GPa and the p…
View article: Shear strength of a three-dimensional capillary-porous titanium coating for biomedical applications
Shear strength of a three-dimensional capillary-porous titanium coating for biomedical applications Open
The effect of pretreatment and plasma preheating of Ti-substrate on shear strength of three-dimensional capillary porous Ti-coating was studied. After sandblasting the shear strength of the plasma sprayed coating was 200 ± 2 MPa, and after…
View article: Structure and microhardness of the plasma sprayed composite coatings after combined treatment
Structure and microhardness of the plasma sprayed composite coatings after combined treatment Open
The principal aim of this study was to evaluate the effect of combination of electromechanical treatment (EMT) and ultrasonic treatment on structure and microhardness of air plasma sprayed composite coatings from Ni–20Cr alloy and R6M5 hig…
View article: Dosimetry study of East Kazakhstan residents by tooth enamel EPR spectroscopy
Dosimetry study of East Kazakhstan residents by tooth enamel EPR spectroscopy Open
The tooth enamel electron paramagnetic resonance (EPR) dosimetry method was used to determine accidental doses of population of settlements in the vicinity of the Semipalatinsk Nuclear Test Site (SNTS), Kazakhstan. The influence of four ex…
View article: Evaluation of external and internal irradiation on uranium mining enterprise staff by tooth enamel EPR spectroscopy
Evaluation of external and internal irradiation on uranium mining enterprise staff by tooth enamel EPR spectroscopy Open
In order to estimate radiation effects on uranium enterprise staff and population teeth samples were collected for EPR tooth enamel dosimetry from population of Stepnogorsk city and staff of uranium mining enterprise in Shantobe settlment …