The influence of the phase composition of high-carbon complex-alloyed bearing steel on its hardness and wear resistance under dry sliding friction conditions has been studied. Using magnetic and X-ray diffraction analysis methods, the change in the residual austenite content was determined to be in the range from 37 to 3 %. It is shown that the maximum wear resistance (2,15·10^-5 mm³/(N·m)) is achieved with a content of 30–37 % metastable austenite, despite the reduced hardness (57 HRC). An increase in the proportion of martensite to 90–97 % increases the hardness to 64 HRC; however, the wear rate increases by 140 %.

The article presents the results of argon-arc welding technology of heat-resistant nickel, cobalt, and titanium based alloys, synthesized by selective laser melting. The study addresses similar and dissimilar joints of synthesized materials with wrought alloys used in manufacture and repair of hot-section components of PD series gas turbine engines. The welding parameters were optimized for KKh28M6, Kh15N5D4B, VT6-PS alloys as well as for dissimilar joints with steel 12Kh18N10T. The microstructure and mechanical properties after repair build-up welding were analyzed. The effect of thermal cycles on welds strength was established.

A regression model has been developed for the new carbon-containing nickel-based superalloy VZhL22 with 2 wt.% Re to predict the effect of casting process parameters on the grain size in polycrystalline castings. The structure forming features of the alloy in polycrystalline and single-crystal castings and turbine blades were investigated during casting and heat treatment. The macro- and microstructures formed during casting and heat treatment provide enhanced short-term strength and long-term strength creep characteristics for polycrystalline castings.

This article considers features of laser surface cleaning of the aluminum alloy. A metallographic assessment of the surface layer structure was carried out, and roughness parameters were measured under various laser exposure conditions. The thickness of the layer removed per laser beam pass was determined. Based on the obtained experimental data, a graph of the roughness dependence on power was plotted, which made it possible to identify the optimal cleaning modes providing minimal roughness at stable material removal depth. It has been shown that laser cleaning is an effective method for surface finishing.

The article examines industrially applicable manufacturing processes for high-pressure compressor blades made of titanium alloys – specifically those with the most widely used dimensions and a «dovetail» root design. The article presents the results of experimental studies on the microstructure and mechanical properties of starting materials – bars and forgings (both individual and group forgings) made from heat-resistant titanium alloys VT41 and VT46, produced via various manufacturing routes. The study demonstrates the feasibility of achieving high mechanical properties and technical-economic indicators for the manufacture of high-pressure compressor blades from VT41 and VT46 alloys using group blanks.

The microstructural features and thermal stability of peroxide-cured binary and ternary blends based on butadiene-nitrile rubber and styrenic thermoplastic elastomers (BNR–TPE) have been investigated. As a result of comprehensive microstructural and thermal analysis of these blends comprising butadiene-nitrile rubber grade BNKS-40AMN and styrenic block copolymers (SBS-R, SEBS) vulcanized with an organic peroxide the principal factors determining their morphological evolution and thermostability were established.

The paper provides a review of scientific and technical literature on fluoroelastomers that are most promising for manufacturing rubber compounds used in aircraft fuel systems operated at elevated temperatures in contact with fuels and oils. It has been revealed that perfluoroelastomers are the most heat-resistant type of rubber, the service temperature of which can reach 315 °C. It has been established that in the Russian Federation, the most promising grades of fluoroelastomers are produced by JSC «HaloPolymer» and FSUE «Research Institute of Synthetic Rubber» (FSUE «SRIIRS»).

Post-curing of GFRP based on a bismaleimide binder was carried out by varying the post-curing temperature and time. The thermophysical properties of the material were determined by DSC and DMA methods. The mechanical properties of the material were determined by flexural and interlaminar shear strength (ILSS) tests. The shift of curing reaction peak, visual changes in the material, and changes in its mechanical properties with the increase of the curing temperature and time were studied. Recommendations for selecting the operating temperature of the material and proposals for further research are provided.

This article is devoted to the production of three-layer fiberglass pipes using continuous winding with low-frequency vibration applied to the mandrel. A set of physical models describing the influence of vibration parameters on structure-formation processes and curing kinetics is substantiated. It is shown that selection frequency and amplitude of vibration allows for a significant reduction in residual porosity without compromising the homogeneity of the composite. The developed approach provides a scientific basis for the engineering design of vibration modules and ensures improved quality, reliability, and competitiveness of pipe products with minimal additional energy consumption.

The surface topography of VPS-53/T-25 fiberglass was studied after 24 months of outdoor climatic testing in moderate and moderately warm climates, as well as after laboratory simulation tests in two modes. After each exposure, the surface topography characteristics of the samples were analyzed, plotting the distribution of surface irregularity heights. Significant differences in the rate of change in the centers of the surface irregularity distribution were revealed during both full-scale and accelerated laboratory climatic tests.

This article presents the key methods for achieving fire safety in fabric-film materials used for the manufacture of flexible ducts for air conditioning systems in aircraft. Fire safety for these products is a key requirement and is essential for the safety of aircraft using air conditioning systems. This article provides information on the influence of the chemical structure of polymer coatings on flexible air ducts' fire safety. Various flame retardant options are discussed. Detailed information, its analysis, and conclusions on the issue under study are provided.

The structure, chemical composition, and magnetic properties of (PrDy)(FeCo)B microwires were studied after vacuum annealing and localized laser irradiation. It was shown that laser irradiation of amorphous microwires causes localized changes in composition, including a decrease in the rare-earth element content in the irradiated zone, whereas in the polycrystalline state, the composition remains virtually unchanged. Vacuum annealing leads to crystallization of the material and transition from a magnetically soft to a magnetically hard state with an increase in coercivity and magnetic anisotropy.

The article considers various approaches to lightning protection of helicopters structures made of PCM. A new development of the Kurchatov Institute – VIAM is presented: a lightning-protection coating of VMZP-3 grade, which is a leveling composite film with an integrated metal layer. It can be used with perforated foils or knitted wire sieves of various surface densities, including those with a glass fabric substrate. The main properties of the developed VMZP-3 lightning-protection coating and the results of tests of elementary samples for lightning resistance are given.

The potential of laser stereolithography for producing zirconium oxide-based ceramics is considered. A highly filled (83 % by weight) photocurable zirconium oxide-based ceramic paste has been developed, enabling the production of complex ceramic products using laser stereolithography (SLA). The physicochemical and thermophysical properties of the ceramics produced from the zirconium oxide-based paste by SLA are comparable to those of ceramics produced by traditional methods.

The article provides general information about polyurethane paint-and-varnish materials, their areas of application and properties. Acrylic-urethane materials as well as their advantages and properties of certain industrial brands are presented. A hydroxyl-containing acrylic copolymer was synthesized by solution radical copolymerization, and the characteristics of the synthesis product were studied. Experimental compositions were obtained based on a copolymer solution. Acrylic-urethane coatings were obtained and their performance characteristics were studied. The effect of the addition of polymethylsiloxane oil on the properties of the material was investigated.

Flash lamp annealing (FLA) is a new method for modifying material properties, using highly powered xenon lamp flashes. While the scientific and technical literature presents numerous studies on modifying properties of opaque structures, less attention has been paid to semitransparent thin-film coatings. This work reviews FLA applications for annealing of transparent conductive oxides, control of phase composition and doping of titanium dioxide and ultraviolet hydrophilization of photocatalysts. The areas of possible future research are also highlighted.

The article demonstrates the fundamental possibility of obtaining the electrical conductivity distribution of TiAl alloy samples made by selective electron beam melting using the eddy current method of non-destructive testing. The X-ray diffraction was performed to correlate the electrical conductivity of the samples with the residual stresses. The dependences of mechanical stresses with the depth of the studied samples before and after the application of hot isostatic pressing were shown.

The paper presents the patterns of dry friction of freely sintered and reactively sintered silicon carbide from the load and sliding speed paired with materials of different types. The first part of the article compares the tribological characteristics of two types of silicon carbide with polymer materials and graphite. These materials are widely used in friction units due to their ability to self-lubricate, which is of the greatest interest for this study and recommendations for possible use expansion.

The study examines application areas of fractographic analysis, its capabilities in the development of new materials, the selection of chemical composition, and the development of production technology. It shows possibilities for modifying fractographic methods for new materials development and the advantages compared with other methods for assessing failure causes of parts and mechanisms. The study presents fractographic methods, applied for assessing quality of a metallurgical alloy, studying patterns and mechanisms of failure process, level of destructive force, and identifying factors that cause material weakening on the path of the main crack propagation.

The article highlights current stationary flaw detectors, auxiliary equipment and accessories that allow for high-level magnetic particle inspection of aviation materials. The main elements of the accessories and the important stages of their application are highlighted. The most critical items are suitable control samples selected based on the used equipment and the methods of magnetization, which help to confirm the operability of the flaw detector and the magnetic indicator. Methods for determining the detecting capacity of several types of magnetic indicators are considered, and methods and approaches for conducting magnetic powder control of aircraft parts are described.