An overview of heat and corrosion-resistant steels of domestic and foreign production, used for the manufacture of aircraft rolling bearings, is presented. The requirements for bearing steels, the classification of steels depending on the operating conditions, and the method of production are described. The chemical compositions of the steels and the principles of alloying are shown, and the analysis of the properties is carried out. The properties of ceramic materials and the possibility of their application for bearings used in the aerospace industry are considered.

Magnesium alloys are the lightest of metallic structural materials with a number of advantages, such as low density, manufacturability and high damping capacity. In this part of the review, the article deals with the anisotropy of the mechanical properties of magnesium alloys associated with the texture of the resulting semi-finished products and products, the relationship of alloying elements with the crystallographic lattice parameters, as well as the deformation mechanisms prevailing in various alloying systems.

The features of quenching on the line of continuous heat treatment (CHT) of wide (2400 mm wide) cladding sheets made of high-strength aluminum alloy B95p.ch. are given. The investigations of the structure, corrosion resistance and mechanical properties in tension at different temperatures shown that the technology of heat treatment, including hardening on the CHT line and subsequent artificial two-stage aging according to the T2 modes of sheets, made it possible to provide a uniform characteristic structure, the surface quality and level of mechanical properties necessary for sheathing sheets along the width of the sheet and in different directions of rolling that meets the requirements of the aviation industry standard.

The technology of electron-beam welding (EBW) of structures of large thickness made of titanium alloy Ti–6Al–4V has been developed. A complex of metallographic studies of welded samples has been carried out. Tests to determine the mechanical characteristics of repair welded joints, that these joints made by EBW are equal in strength to the base material. The analysis of the level of residual stresses in various parts of the welded joint after repeated repair passes has been carried out. It was found that the subsequent vacuum annealing reduces the level of residual stresses in welded joints to 50 %. The analysis of the elemental composition showed that the elemental composition of the samples from the center of the weld to the base metal practically does not change for welding with the number of repeated passes up to 3.

The influence of the chemical nature and component composition of the polymer base and the curing conditions of conductive adhesive compositions on their conductive properties is shown. The values of the volumetric shrinkage during the curing of the adhesive are compared with the realized level of conductive properties. The influence of the temperature level during curing on the electrical conductivity of the cured glue is shown. Shrinkage phenomena, viscosity, temperature range of the curing reaction were investigated as factors determining the appearance and formation of the conductive properties of conductive compositions during curing.

Describes compositions based on a mixture of phenol-formaldehyde oligomers of the resole and novolac types, used to create foams, laminated plastics for electrical purposes, friction materials, press compositions, sealing putties, as well as for vulcanization of rubbers. Detailed information on the composition and physicochemical properties of the compositions and their technological characteristics are given. The main advantages of resole-novolac materials are shown: strength, heat resistance, reduced flammability, low moisture absorption, good dielectric properties.

In this paper provides an overview of scientific and technical literature and developments in the field of tungsten-free hard alloys or cermet as promising materials of a new generation metalworking tools. Methods of obtaining sintered hard alloys, their structure and basic operational properties are considered The main directions of improving the properties of hard alloys are given. The results of experimental work on the production of cermet by high-speed quenching of the melt are presented. The obtained fast-quenched materials of the Fe–TiC–TiB₂ system demonstrate physical and mechanical properties at the level of sintered hard alloys, but at the same time it contain 2–3 times less of the carbide phase.

 The results of the work performed at NRC «Kurchatov Institute» – VIAM in research on aspects of the influence of operational factors (high humidity and temperature) on the physic-mechanical properties of glass fiber composite VPS-31. The main physical and mechanical properties of samples obtained from the spar of the helicopter's main blade are presented (including the glass transition temperature, strength and modulus of elasticity in tension, elongation at break at various test temperatures in the initial state and after exposure to moisture). We studied the fragments of the spar, successfully passed thermocyclic tests («day/night»). The results of the research confirmed the possibility of exploitation of glass fiber composite VPS-31in a humid tropical climate.

The paper considers the use of atmospheric pressure plasma (APP) treatment as a method for surface preparation of fiberglass of the VPS-53K brand in the manufacture of the main rotor blades of a helicopter of the «Mi» family. It was found that APP treatment increases the strength of the «spar–sheathing» adhesive bond (fiberglass grade VPS-53K), and also that there is a decrease in the bond strength in the presence of a temporary gap (one month) between the processing of the APP sheathing and the gluing operation, which requires additional research.

In view of the fact that sanctions are constantly being introduced against the Russian Federation, it became necessary to use domestic materials in the designs of modern helicopters being developed in our country that meet all the necessary requirements foe this. Approaches to the development of domestic materials with specified characteristics for use in the designs of advanced helicopter technology are considered. The selected methods made it possible to develop polymer composite materials that meet the necessary requirements are not inferior in properties to those of the imported analog.

The determination of gas-forming impurities in samples of low-alloyed copper alloys of the Cu–Cr and Cu–Cr–Zr systems is carried out. The content of sulfur and carbon was determined by the method of combustion in an induction furnace of a gas analyzer with subsequent detection in the infrared cell of the spectrometer, and to determine oxygen and nitrogen, the method of reducing melting in a flow of an inert carrier gas was used, followed by the detection of oxygen in the infrared cell and nitrogen in the conductometric cell of the gas analyzer.

The procedure for comparing the kits of reference materials of nickel alloys VZh172 and VZhL21 is considered. Using the method of atomic emission spectrometry with inductively coupled plasma for analytical lines of elements Al, Co, Cr, Mo, Ti, W, Zr, Fe, Mn, calibration characteristics were constructed using by two kits of reference materials VZh172 and VZhL21. According to statistical criteria an assessment is made of the possibility of joint use of the kits when constructing general calibration characteristics using the method of atomic emission spectrometry with inductively coupled plasma for the simultaneous determination of elements Al, Co, Cr, Mo, Nb, Ta, Ti, W, Zr, Fe, Mn in nickel alloys.