The paper presents the results of mechanical properties studies of samples made from high-strength corrosion-resistant maraging steel of the Fe–Cr–Ni–Co–Mo system, obtained by selective laser melting. A comparative analysis of mechanical properties at ambient temperature (20 °C) and at elevated temperatures (500 and 550 °C) of 3D-printed samples along the Z axis and along the XY plane, as well as mechanically processed samples and samples without mechanical processing of the working surface was carried out.

The review considers the practical application of the directional solidification technique with a flat front to obtain castings with height-variable chemical composition (gradient castings with macrosegregation) and to solve problems of physical metallurgy of γʹ-strengthened Ni- and Co-based superalloys. Such problems include: determination of the influence of alloying elements Re, Ru, Ta and Al on the γʹ-solvus, solidus and liquidus temperatures of single-crystal nickel-based alloys, optimization of the chemical and phase composition of single-crystal Ni- and Co-based alloys, determination of the influence of alloying elements Al and W on compressive yield strength and heat resistance of cobalt-based alloys.

The article presents the main stages of development of wire arc cladding (WAAM) technology. The experience of using WAAM for various groups of materials (steel, nickel, titanium, aluminum and other alloys) is presented. The main problematic issues and methods for improving quality of workpieces obtained by WAAM technology are considered. Advantages of the technology are low labor intensity, high material utilization factor and productivity; the ability to synthesize and restore large-sized parts; less science-intensive production of wire compared to metal powders.

The article treats the five most commonly used methods for cutting products and structures made of polymer composite materials and provides the main advantages and disadvantages of each of them. This article also outlines the design features and principles of operation of each type of tool, with which the manufacture of standard test samples is carried out. The strength parameters and structure of carbon fiber plastics, which were made by different cutting methods, are given. Using the method of X-ray computed tomography, the analysis of the defective zone of the polymer composite material was carried out.

The main operational properties of the thermal and sound insulation material of the VTI-29 brand were studied, including: density, sound absorption coefficient, thermal conductivity coefficient, mass loss after 168 hours at a temperature of 70 °C, sorption humidity after 30 days at a temperature of 22±5 °C and relative air humidity φ = 98 %, residual combustion time and burnout length. It was established that the thermal and sound insulation material of the VTI-29 brand is comparable to Microlite AA blankets and ATM-1 materials, while in terms of density, sound absorption coefficient and sorption humidity, it surpasses them.

The complex estimation of combustibility of smoke formation and toxicity of carbon fiber-reinforced plastic of mark VKU-59 on the basis of adhesive prepreg of mark KMKU-6.80.UV and glass fiber-reinforced plastic of mark VPS-68 on the basis of adhesive prepreg of mark KMKS-6.80.T60(VMP), as well as three-layer honeycomb structures on their basis to the requirements of aviation norms has been carried out. According to the results of tests of carbon fiber-reinforced plastic of mark VKU-59, fiberglass plastic of mark VPS-68, and honeycomb structures on their basis for combustibility, full compliance with the requirements of aviation standards was established. 

The second part of the article series on climatic aging of paint coating systems shows the difference in the change in the color distance of aluminum alloy samples with applied epoxy and fluoropolyurethane enamels with red and gray pigments when exposed to climatic zones of moderate, moderately warm and dry subtropical climates. The article provides the calculation of parameters of the time exponential model describing the change in the color distance. As a result there has been found a significant difference in the change in the color distance in moderate and moderately warm climate from the same indicators of a dry subtropical climate.

The article treats the possibility of estimation of specific defects occurring in carbon-carbon composite materials by eddy current method of nondestructive testing. With the help of the developed mathematical model of electromagnetic field distribution, there has been analyzed the influence of the range of parameters on the estimation of the defects’ depth including the diameter of the absolute transformer overhead eddy current converter and the frequency of the excitation current on the estimation of the depth of such defects, as well as the influence of the defect orientation relative to the surface. The article analyzes sensitivity of defect depth estimation for different values of excitation current frequency and transducer diameter. The possibility of large defects estimation is confirmed by means of tests on specimens-simulators with kerfs of different depth made of carbon-carbon material.

Titanium has high melting point, low density and high mechanical properties, therefor it finds broad application in space engineering. The fire hazard characteristics of titanium, relevance of performed works and experimental methods of assessment are analyzed. It is established that there are no standardized test methods on fire hazard for samples of titanium alloys, as a result the obtained results are incomparable. The main requirements to which there has to correspond the test stand intended for assessment of fire hazard of samples made of titanium alloys are analyzed.