In this paper the stages of constructing a map of the selective laser melting process for nickel alloys presented: initially, the map was initially constructed using thermodynamic modeling, then refined and empirically verified. The optimal range of linear energy density for nickel alloys is established, regardless of the hatching type. For the nickel alloys considered in this work the curves for porosity, average and maximum pore size on linear energy density in the optimal range are parabolic.

Samples of rhenium-containing alloy VIN4M and rhenium-ruthenium-containing alloys VZhM8 and VZhM10 after complete heat-treatment were studied. It was shown that interphase dislocations are observed in the axes of dendrites. In the structure of the VIN4M alloy, the boundaries of large y'-phase particles are decorated with dislocation clusters forming regular networks. The misfit in the VIN4M alloy is 0,60 % for large formations of the y'-phase in the interaxial spaces and 0,63 % for y'-phase particles in the axes of dendrites. The lowest misfit value of 0,46 % was obtained for the VZhM8 alloy, the highest 0,97 % – for the VZhM10 alloy. Stacking faults in the alloys are formed in γ-interlayers between lattice mismatch dislocations at the opposite boundaries of adjacent particles.

The influence of various strengthening heat treatment modes on physical, mechanical properties and corrosion resistance of high-strength corrosion-resistant martensitic steel of grade 30X15AMPF-SHPD (VNC78-SHPD) with super-equilibrium nitrogen content in tough test conditions is considered. The effect of different tempering temperatures on the microstructure, tensile strength, hardness, saturation magnetization and corrosion properties of the steel has been studied. Methods for increasing the corrosion resistance of the steel after aging are shown.

Removal of model masses from ceramic shell molds is one of the complex technological operations in the manufacture of gas turbine engine parts by the method of investment casting. This review considers the possibilities of using dielectric (microwave) heating as a promising method for removing model compositions. In the first part, the article considers the features of the behavior of a material that does not conduct electric current and is placed in an electromagnetic field. Also the requirements for the designs of dielectric heating units are given, and the main areas of their use are listed.

The fatigue properties and crack resistance of solid-rolled rings made of VT46 titanium alloy were investigated. The influence of macrostructure inhomogeneity and microfiber orientation on mechanical properties was established. It was shown that despite the overall stability of strength properties, anisotropy of fatigue life and crack growth parameters is observed. There were determined threshold stress intensity factors, and were estimated critical defect sizes. It is necessary to enhance the rolling technology to improve structural homogeneity.

A comprehensive analysis of the factors determining the vibration-absorbing capacity of polymers in the viscoelastic state has been carried out. The influence of temperature and frequency on the relaxation properties of polymers has been studied, and the application of the time-temperature equivalence principle for predicting material behavior over a wide frequency range has been substantiated. To control dissipative properties, such polymer modification strategies as the combination of several polymers, the creation of the phase structure, and the reinforcement of the polymer with fillers are described.

This article examines the influence of vibration on a mandrel during the production of fiberglass pipes using the continuous winding method. Porosity reduction mechanisms associated with deaeration, improved filler wetting, and vibration compaction of the structure are considered. The influence of vibration frequency and amplitude on the pore volume fraction was experimentally determined. The maximum porosity reduction was 69,8 % at a frequency of 100 Hz and an amplitude of 0,4 mm. A regression model for predicting porosity and optimizing process parameters was developed.

The article considers the effect of thermosetting binder composition on the mechanical and fire-safety properties of fiberglass plastics for use in aircraft interior structures. It is shown that the choice of polymer matrix determines not only the strength and stiffness of the material, but also its fire resistant properties. The article analyzes the specific features of epoxy and phenol-formaldehyde binders, as well as methods for their modification. Based on the scientific and technical literature data, and conducted research, a new molten phenol-formaldehyde binder has been developed.

The review considers catalytic systems based on a variety of palladium complexes for Suzuki–Miyaura and Mizoroki–Heck reactions in homogeneous and heterogeneous versions. It has been shown that the use of organosilenium and carbene ligands makes it possible to achieve quantitative yields at ultra-low catalyst loads. Approaches to the immobilization of complexes onto different carriers that enable repeated use of catalysts and minimal metal loss are considered. The practical significance of the considered reactions for the creation of functional materials with specified characteristics is noted.

In the context of the intensive development of nuclear energy, power plants for aerospace industries, and electronics, the requirements for structural materials are increasing. One of these requirements is to ensure the operability of materials and products made from them, and preservation of their functional properties, primarily thermal and electrical conductivity under prolonged exposure to thermal and mechanical loads. Dispersion-strengthened copper alloys, in which hardening is achieved by introducing nanoscale thermostable particles of oxides, borides, etc. into the matrix, solve this problem.

This paper presents the key features of the technological process for applying protective ion-plasma coatings to dummy large-size gas turbine engine parts using the VIAM-MESh-50 pilot ion-plasma unit. The interaction factors between extended-zone vacuum arc evaporators in a multi-electrode system are described. Metallographic studies of the deposited NiAlCrY protective coating on the dummy parts are presented. The distribution of the deposited coating thickness over the surface of the dummy parts is studied.

Methods for producing metal powder composites are presented, including those used in additive manufacturing and protective coatings It is shown that in aircraft manufacturing and other industries with high demands on powder properties, gas, thermal, centrifugal, or plasma atomization technologies are the most suitable. At the same time, the final choice of the most suitable technology should be based on a compromise between the required particle quality and the productivity of the process.

This study investigates the effect of storage time and conditions on the changes in the morphology and depth of corrosion damage of 1163-T1 and 1441-RT1 aluminum alloy specimens during the interval between accelerated intergranular corrosion testing and metallographic section preparation. It has been determined that the mean corrosion depth increases significantly depending on storage time and conditions. Based on the experimental findings, conclusions are drawn and practical recommendations for conducting accelerated intergranular corrosion tests are provided.

This article analyzes key aspects affecting the stability of the physical and mechanical properties of carbon fibers and demonstrates the relationship between these properties and the thermodynamic stability of carbon fiber, which does not guarantee the retention of properties due to the degradation of the sizing agent under external factors. A review of existing monofilament tensile testing standards (GOST, ISO, ASTM) is provided. Systematic errors in determining fiber diameter and cross-sectional area, in conducting monofilament tensile testing, and in recording strain are discussed.

The contact area was analyzed during the testing of samples using the modified pull-out method from a «knot». The adhesive strength between the domestic carbon fiber UMT42S-3K and the epoxy binder VSE-30 was obtained using the improved pull-out method from a “knot” and the reference pull-out method. The packing density coefficient of the filler in microplastic was investigated using a scanning electron microscope. The strength of carbon monofilaments was determined using a microtensile testing machine.

Climatic testing of VPS-53/T-25 fiberglass was conducted in outdoor, moderate and moderately warm climates for 12 months, as well as laboratory simulation tests in two modes. After all intermediate measurements, flexural strengths were measured, taking into account the reversible effect of moisture. The mass of the specimens was measured during drying and wetting to determine moisture transfer parameters. Correlations between the studied characteristics were calculated during full-scale and accelerated climatic tests.

The article provides an overview of the main areas of mycological research in Russia on biodeterioration in recent years. The main areas include research on the biodiversity and species composition of microfungi-destructors, the impact of their activities on materials, products, and structures; research on fungal metabolites and other physiological properties of microfungi-destructors; research on the fungal resistance of materials and the effectiveness of fungicidal agents, and the selection of means of protection against microbiological biodeterioration.