Articles

 


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1.
УДК 669.017
Lukina E.A.1, Korolyov V.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Features of process of the selection laser synthesis with reference to cast alloys on the basis of nickel and Ni3Al intermetallic compound
    The formation of track-structure in the crystallization under selective laser melting process of cast Ni-base superalloys and Ni3Al superalloys metal powders is reviewed in the article. Carried experiments has shown that the tracks are consist of the cells, which are joined in sub-grains. Their boundaries are often decorated of direct carbide and primary γ'-phase nets. It is established that crack formation due to internal stresses is carried on grain boundaries. It is shown that the heating of the building platform promotes to reducing of cracks amount. The further thermovacuum treatment and hot isostatic pressing provide formation of bulk material without cracks and with favorable morphology of γ'-phase.
    Keywords: selective laser melting, intermetallic superalloys, Ni3Al, track structure, cell ctructure.


    2.
    category: Testing of materials and structures
    УДК 669.017
    Kochubey A.Ya.1, Medvedev P.N.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Direct pole figures in the study of structure formation processes during heating of deformed metals and alloys
    Work is executed within implementation of the complex scientific direction 2.1. «Fundamental the oriented researches» («The strategic directions of development of materials and technologies of their processing for the period till 2030») [1, 2]. The paper presents the methodological research bases of structure formation processes during heating of deformed metals and alloys using direct pole figures [3, 4]. The connection of structural transformations with the respective stereographic projection and direct pole figures changes obtained by x-ray has been shown [5, 6]. Examples of research and primary recrystallization process using direct figure pole have been demonstrated.
    Keywords: straight pole figure, X-ray analysis, heat treatment, recrystallization


    3.
    УДК 543.51:669
    Alekseev A.V.1, Yakimovich P.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Determination of copper, zinc, arsenic and selenium in complex alloyed high temperature nickel alloys using ICP-MS
    Now in the modern aviation industry and engine manufacturing high temperature nickel alloys are used in the manufacture of critical parts experiencing during its work, the huge thermal and power load. On the properties of the produced materials significant negative impact can have impurities of different elements. Therefore, an important task is to control the chemical composition of nickel alloys, especially the content of trace impurities, which include copper, zinc, arsenic and selenium. In this work the determination of copper, zinc, arsenic and selenium in certified reference materials of complexly alloyed Nickel alloys using the method of mass spectrometry with inductively coupled plasma (ICP-MS). The method of dissolution of the sample and its preparation for analysisis described. Applied various methods of eliminating spectral interferences: the reaction-collision cell, or a mathematical correction. The detection limit was, % of the mass: 0,00005 Cu; 0,00007 Zn; 0,00005 Se; 0,
    Keywords: inductively coupled plasma mass spectrometry (ICP-MS), nickel alloys, determination of copper, determination of zinc, determination of arsenic, determination of selenium, microwave sample preparation.


    4.
    category: Material processing technologies
    УДК 66.017
    Izakov I.A.1, Kapitanenko D.V.2, Bazhenov A.R.2
  • [2] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Research of parameters of technological processes of isothermal deformation
    Results of theoretical and experimental researches of isothermal deformation technological processes parameters are presented in this article. The influence of thermal effect of plastic deformation and dynamic recrystallization at depending on temperature and speed on the strain resistance and the influence of isothermal deformation rate at die working life are investigated. The method of evaluating the true temperature of the metal during deformation under isothermal conditions, based on the energy account, spent on the plastic deformation and heat removed from the workpiece is proposed. The method of calculating the optimum strain rate taking into account the creep of the die material is proposed. The creep curves of die material at a constant temperature is used. Some results (influence of deformation thermal effect on dynamic recrystallization, for example) were used for dynamic softening experimental researches results analyzing.
    Keywords: recrystallization, deformation, die tooling , isothermal deformation.


    5.
    category: Testing of materials and structures
    УДК 621.763
    Sokolov E.G.1, Ozolin A.V.1, Kozachenko A.D.2
  • [1] Federal State Budgetary Institution of the Higher Education «Kuban state university»
  • [2] Joint Stock Company «NC «Rosneft» – Research-and-Technical Centre»
  • Influence of cobalt on the process of brazing of diamond-abrasive tools by Sn–Cu–Co–W composite brazes
    It was researched the influence of cobalt powder on the viscosity of composite brazes Sn–Cu–Co–W and on the hot cracking of brazed diamond-impregnated layers. The object of the study was the process of brazing of shaped diamond-abrasive tools by composite brazes Sn–Cu–Co–W. Purpose – to determinate the optimal content of cobalt powder in the composite brazing alloy, ensuring the formation of uniform diamond-bearing coatings on complex shaped surfaces of diamond tools. For experimental studies was prepared the brazing paste Sn–Cu–Co–W with a cobalt powder content of 20 to 34% (wt.). Brazes without diamonds were applied to the cylindrical rollers with a diameter of 20 mm, made of steel St.3. The mixture of braze and AS150 diamonds (400/315 micron grain size) containing 25% of diamonds (by volume) was applied to the shaped rollers with a maximum diameter of 85 mm, made of steel 45. Samples were dried and annealed in vacuum at 820°C for 40 minutes exposure. It is found that with increas
    Keywords: cobalt, composite brazing, viscosity, diamond tool.


    6.
    УДК 629.7.018.4
    Nuzhnyy G.A.1, Gulina I.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Research of long-term action of permanent load and corrosion environment on fracture toughness constructional aluminum alloys
    Method of research of kinetics of destruction metallic material by long-term action of permanent load and corrosion environment based on specimen of new type was worked out. This specimen excel specimen of standard ASTM Е1681 in functional capabilities that intended for threshold valuation of stress intensity factor at fixed crack opening by bolt and may was exhibited on exposition in any corrosion or aggressive environment and also have the opportunity to definition of applied tensile load to specimen in testing. Testing of specimens of slab constructional aluminum alloys 1163-Т и V95p.c.-Т2 was carried out. Paradoxical fact of growth of conventional stress intensity factor by propagation of corrosion crack was determined that was conditioned by change of topography of ruptured zone.
    Keywords: fracture toughness, corrosion environment, crack


    7.
    category: Functional and smart materials
    УДК 621.186.4
    Butakov V.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Features of receiving flexible heatinsulating material
    The article considers the process of production a flexible insulation material method of forming from water slurries. Hypothesized the relationship parameters of the material structure and its resistance to stretching and bending resistance. A new method of homogenization of water slurry is suggested. The article compares the proposed method with the traditional method of homogenization using a blade mixer. This work has allowed to confirm the hypothesis a more flexible material with the increase of average length of the fibers in the material.
    Keywords: heat insulation, flexible fibrous material, minimum bend radius


    8.
    category: Nanomaterials
    УДК 678.8
    Shvetsov E.P.1, Grebeneva T.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • The polymeric nanomodified composite material for the construction industry
    Developed nano-modified polymer binder and fiberglass based on it is characterized by high strength characteristics and essential performance properties of a highly developed manufacturability binder, using nanodisperse modifiers, as well as manufacturing technology PCM. Work is executed within implementation of the complex scientific direction 13.1. «Binding for polymeric and composite materials of constructional and special purpose» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)
    Keywords: nano-modified polymer binder, nano-modified fiberglass composite material, building construction


    9.
    category: Protection against climatic and microbiological degradations
    УДК 678.019.32:539.37
    Dobrodushnova V.I.1, Kozlova M.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • The influence of hygrothermal and climatic aging on the thermoplastics deformation patterns
    The effect of hygrothermal and climatic aging on the deformation patterns of thermoplastics with linear (organic glass brand СО-120) and rarely cross-linked (organic glass brand BOC-2) structures was investigated. It has been shown that the thermos-moisture-saturation for 132 days at 70°C and humidity of 85% leads to a marked uniaxial tension curves decrease at room temperature and temperatures equal to 0,95 the softening temperature of the respective materials. At the same time exposure to moderately warm climate conditions for 12 months leads to strain curves decrease only at elevated temperatures. This work was performed as part of the comprehensive scientific areas 2.2. «Qualification and materials research» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)
    Keywords: organic glass, strain curve, rubber-like elastic strain, hygrothermal aging, climatic aging