Adaptation of foundry heat-resistant nickel-based superalloys for additive technologies is inexpedient, since such materials cannot meet the ever-increasing requirements for synthesized materials, in particular, for creep resistance or long-term strength at elevated temperatures. In the present work we consider a new experimental composition of heat-resistant nickel-based superalloys developed in relation to additive technologies for the selective laser melting method, which is not inferior to the alloys of this system in terms of properties obtained by conventional methods.

The results of investigation of the influence of solder composition on the formation of the soldered joint of iridium contacts of spark plugs with CH60VT alloy as the material of the contact holder are presented. The comparison of the soldered joint formed by serial solder VPr50 and experimental solders after soldering and holding for three hours at 1000 °C has been carried out. The main phase components capable of leading to decrease of long-term strength of soldered seam during operation have been revealed. The regularities of redistribution of elements in the soldered joint and diffusion zones have been determined due to decrease of erosion activity of solder in relation to iridium and alloy KhN60VT.

The article presents the results of a study of the tribological properties of a wear-resistant ion-plasma coating to increase the service life of parts with a low tempering temperature. It has been found that this wear-resistant coating, with a thickness of 7 to 10 microns, consists of a damping lower and wear-resistant upper layers, has a coefficient of friction of 0.12, the total wear rate of the friction pair is 0,012·10^–3mm/m, the average total linear wear of the friction pair is 0,012 mm in an aviation fuel environment paired with antimony lead bronze.

The article presents and describes the results of determining mechanical and corrosion properties, as well as microstructure particularities of metal matrix composite materials (MMC) based on various alloying systems of magnesium alloys: Mg–Al–Zn–Mn, Mg–Zn–Ca, Mg–Zn–Zr–REE (Y, Nd), Mg–Al–Ca. Nanoscale reinforcing particles SiC, Y₂O_3, Al₂O₃ were used as a filler. The studies of MMC were carried out in cast and homogenized states. It has been established that Mg–Zn–Ca alloy system/3 wt % SiC should be considered as the optimal composition for the metal matrix composite material.

Based on the results of microstructural studies, the structural features of hollow-fiber fiberglass samples before their water absorption testing are considered. An analysis of changes in the density of hollow-fiber fiberglass samples measured by hydrostatic weighing is performed depending on the number of days during long-term water absorption. A study of the water absorption process of hollow-fiber fiberglass samples is performed based on the analysis of nature-like technologies − similar systems and models of water absorption that exist in nature.

The article analyzes the scientific and technical literature data concerning the main methods of removing moisture-proof electrical insulation coatings from printed circuit boards and assemblies during their repair and modification. Characteristics, advantages and disadvantages of the removal of electrical insulation coatings by dissolution, peeling, mechanical, thermal and micro-jet methods are presented. The above methods mentioned for polyurethane, epoxy, acrylic, organosilicon and parylene electrical insulation coatings are considered and the most optimal methods depending on the nature of the material are determined.

The fundamentals of homoepitaxial growth of silicon carbide by chemical vapor deposition are presented. Main defects, arising during growth and doping of silicon carbide, are considered. In the study has been described the causes of defects and their influence on the properties of semiconductor devices. It is revealed that most defects in silicon carbide epitaxial layers arise from the use of low-quality substrates. The influence of the C/Si ratio and deposition temperature on defect formation is shown. Conditions for reducing defects are considered.

The article examines the correlation dependences between the change in the color distance of aluminum alloy samples with epoxy and fluoropolyurethane enamels with red and gray pigments when exposed to natural conditions of three climatic zones and laboratory conditions. It is shown that the use of a model of color distance change, taking into account the dose of solar radiation, and the obtained correlation dependences allows to accurately calculate the duration of laboratory simulation tests.

The article describes the testing of radiographic technical films according to the regulations of GOST R ISO 11699-1–2023 and according to the method developed at NRC «Kurchatov Institute» – VIAM. The obtained informative characteristics of radiographic films are compared. The article shows that obtaining a characteristic curve according to the requirements of GOST R ISO 11699-1–2023 does not take into account the influence of X-ray radiation energy. The properties of the analog of the characteristic curve according to the developed method take into account its dependence on the radiation energy, i.e. it determines not only its sensitometric properties, but also its flaw detection properties.

The articlecompares the X-ray diffraction and metallographic methods for determining β- phase proportion in titanium alloys. The values of the β-phase proportion determined by the metallographic method are inflated against those determined by the X-ray method. These results show the necessity to improve these methods. The study of residual stresses has shown that when applying macrodeformation, the rate of the β-phase lattice deformation growth is higher than the same of the α-phase. The paper proposes to determine the  Poisson’s ratio by the X-ray method using the accessoriez for modeling of bending or uniaxial tension tests.

The article provides an overview of the development of magnetic non-destructive testing technologies. After a brief summary of theoretical studies of the effect of magnetic stress coupling, three popular magnetic non-destructive testing technologies based on: detection of the defect scattering field, the Barkhausen effect and magnetic memory of metal are considered. The article considers the physical mechanism and some important experimental results related to the three technologies of non-destructive testing. The problems associated with each method in this area are also summarized.