№8 2023

  • 1
    Petrushin N.V., Golinets S.A, Rimsha E.G., Ryzhkov P.V.

    The results of experimental studies of short-term strength, long-term strength, multi-cycle fatigue and low-cycle fatigue of the castable corrosion-resistant nickel-based superalloy VZhL23 for turbine blades of GTI and GTE are presented.

    Comparative analysis of the obtained values of long-term strength, multi-cycle fatigue and low-cycle fatigue of VZhL23 with the most heat-resistant foreign alloy IN-792 is carried out. It has been established that according to the set of mechanical properties VZhL23 is not inferior to IN-792.

  • 2
    Echin A.B., Deynega G.I., Narskiy A.R.

    The main results of the research work carried out at the NRC "Kurchatov Institute" – VIAM in the period from 2015 to the present in the field of creating new materials for casting processes of nickel superalloys are considered. Serial production and supply of a number of materials to machine-building enterprises has been established. A promising task is the organization of low-tonnage production of blades for power turbine installations in order to solve the problem of import substitution and expansion of domestic production.

  • 3
    Krokhinа V.A., Arislanov A.A., Putyrskiy S.V., Naprienko S.A.

    . Presents the results of a study of the structure and mechanical properties of semi-finished products from the VT22M alloy after various modes of heat treatment with heating in the β-region. The regimes differed in the rate of cooling from the β-region and the presence of intermediate exposures. The study of mechanical properties in tension, impact strength and fracture toughness was carried out, the analysis of macrostructure and microstructure was carried out. After testing for fracture toughness, fractographic studies were performed to assess the nature of the fracture of the samples. The effect of heat treatment modes in the β-region on the structure and mechanical properties of semi-finished products from the VT22M alloy is shown.

  • 4
    Shiryaev A.A., Nochovnaya N.A.

    Presents the classification and features of various subgroups of metastable β-titanium alloys, considers typical approaches for their heat treatment and thermomechanical processing. The results of recent studies that form trends for further development in the field of heat treatment and thermomechanical processing technologies for metastable β-titanium alloys are presented. It is noted that the main trend of most publications is the use of modern high-tech research methods: SEM, HRTEM, EBSD. Among the most important trends in the study area, one can single out works related to obtaining and controlling the characteristics of a bimodal and multimodal structure in order to increase the level and ensure a balance of the complex of mechanical and operational properties.

  • 5
    Yashin M.S., Kapitanenko D.V.

    Рroperties and structure of forgings made of titanium alloy VT3-1, obtained by isothermal deformation under the conditions of the National Research Center «Kurchatov Institute» – VIAM presented in present paper. The draft was carried out according to the scheme of blades with a degree of deformation of 60 % and according to the scheme of disks with a degree of deformation of 80 %. The forgings were subjected to low-temperature, isothermal and double annealing. It has been investigated that the VT3-1 alloy has a high technological plasticity in the temperature range below the polymorphic transformation limit. Stampings show the required level of properties when deformed in the (α + β)-area.

  • 6
    Mukhametov R.R., Mosiyuk V.N., Shosheva A.L., Bukharov S.V.

    The review of the released epoxybismaleimide materials of various scopes is provided in the real work on the basis of the analysis of domestic and foreign patent and scientific and technical literature: binding, adhesives. The physical and thermomechanical properties of polymer matrices of epoxybismaleimide resins and adhesives are presented. Modification of the epoxy polymer matrix with bismaleimides increases the heat resistance, strength, and crack resistance of polymer composite materials (PCMs) based on them.

  • 7
    Kuznetcova P.A., Tkachuk A.I., Karavaev R.Y., Donetskiy K.I.

    This paper provides an overview of the scientific and technical literature on the use of molten epoxy binders for the manufacture of semi-pregs processed by vacuum bag only for the manufacture of large-sized products from polymer composite materials for structural purposes. The comparison of porosity values of materials obtained by vacuum bag only of semi-pregs and prepregs is given. The main necessary technological requirements for epoxy binders for the production of semi-pregs are listed, as well as technologies used in industry for the manufacture of semi-pregs.

  • 8
    Putilina P.M., Kutsevich K.E., Isaev A.Yu.

    Foreign and Russian publications on the use of carbon fiber-reinforced plastics (CFRPs) and glass fiber-reinforced plastics (GFRPs) in the structural elements of unmanned aerial vehicles (UAVs) were reviewed. The advantages of their application and the influence of strength-to-weight ratio of the materials on the efficiency of the UAV were described. The types of components made of polymer composite materials, their creation methods and the influence of manufacturing technology on the properties of plastics were explored. Adhesive prepregs with carbon and glass reinforcements developed by the NRC «Kurchatov Institute» – VIAM are proposed for possible use in the design of UAVs.

  • 9
    Kozlov I.A., Fomina M.A., Dyomin S.A., Vasiliev A.S.

    The method of cold gas-dynamic spraying (CGS) of coatings has certain advantages, such as simplicity of the technological process, environmental friendliness, as well as the possibility of obtaining coatings with a wide range of functional properties (corrosion resistance, fire resistance, electrical insulating properties, etc.) through the use of various powder materials and ways to make them. The article presents the results of research in the field of application of powder materials for coating, describes composite powder materials with a complex structure obtained as a result of mechanical alloying, including those containing ceramic particles and particles of intermetallides.

  • 10
    Veligodsky I.M., Koval T.V., Gulyaev I.N.

    The climatic resistance of CFRP to influence of eight types of climate of different climatic zones during the three year exposition were investigated. Exposed polymer composite was studied by optical microscopy, dynamical mechanical analysis, moisture saturation, flexural strengthandcompressive strength of polymer composite were determined. Deterioration of upper layer of polymer matrices after exposition was shown. Relationship between climatic factors influence on polymer composites, changing of polymer matrices condition and decreasing of material strength was found.

  • 11
    Min P.G., Yakimovitch P.V., Alekseev A.V.

    Рresents the results of the development of a set of standard samples of cast superalloy VZhL718. The process of choosing the optimal composition of the alloy is described, as well as the use of various technologies for obtaining a material suitable for calibrating various spectral equipment: mass spectrometers with a glow discharge, optical emission and х-ray fluorescence spectrometers, etc. The determination of 22 elements (Fe, Al, Cr, Co , Mo, Ti, Nb, Ta, P, Mn, Cu, Zn, As, Se, Cd, Sb, Te, Pb, Bi, V, Ag, Sn) in the obtained standard samples.

  • 12
    Ermishev V.Yu., Laptev A.B., Startsev V.O.
    Part 2. Samples and methods for their analysis

    Рresents a brief comparative analysis of domestic and foreign standards for testing non-metallic materials when interacting with microorganisms. Laboratory methods for analyzing the degree of biodegradation of materials used, among other things, in the test standards for synthetic polymers, are given. The significance of the physical dimensions of polymer samples for the search and testing of microorganism strains for the ability to use the chemical component of the material as a nutrient substrate is shown.