Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

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1.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-3-8
УДК 669.018.44:669.245
Volkov A.M., Karashaev M.M., Bakradze M.M., Pustynnikov T.O.
Alternative technologies of the incresing of mechanical properties of P/M Ni-based superalloys for jet-engine disk application (review)

The review of technological solutions which not yet has come to wide apply in production of jet-engine disk billets from Ni-based superalloy powder are presented. The methods of formation of particular phase composition are reviewed. The manners of powder production which are alternative to atomizing and PREP techniques are cited. The results of works carried out on liquid-phase sintering at the stage of consolidation of powder particles are described. Some original methods of material treatment for dual microstructure formation are enumerated.

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2.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-9-17
УДК 621.7.043:669.018.44
Ponomarenko D.A., Skugorev A.V., Kin T.Yu., Shpagin A.S.
Forging of blanks of turbine disks of small-size gas turbine engines from VAR-ingots of alloy EP742-ID by using isothermal presses

The work is dedicated to obtaining deformed blank of turbine disk of small-size gas turbine engine immediately from vacuum-arc remelted ingot (VAR-ingot) of heat-resistant nickel-based alloy EP742-ID using the method of isothermal deformation. Principal possibility of obtaining quality blank of turbine disk with use of VAR-ingot as primary blank instead pre-deformed one (forged or pressed blank) is shown. Proposed technological scheme can be used for production of blank disks of small-size gas turbine engines from other grades of heat-resistant alloys.

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3.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-18-26
УДК 629.7.083
Dobrynin D.A., Pavlova T.V., Afanasev-Khodykin A.N., Alekseeva M.S.
The use of electrolytic-plasma treatment for repair of GTE blades

A comparative review of traditional methods (mechanical, chemical and electrochemical) of removing protective coatings from the surface of GTE blades with the method of electrolytic-plasma removal of coatings is presented. Comprehensive repair of GTE working blades made from alloys such as ZhS, including cleaning the outer surface of the blades from carbon deposits, gas corrosion products and spent coatings of MеCrAlY composition, using the technology of electrolytic-plasma removal of coatings, hot isostatic pressing (HIP) and heat treatment to restoration of the structure of the material of the blades, flaw detection control and soldering of damaged surface areas, mechanical processing of soldering sites, the operation of coating the composition MеCrAlY on the outer surface of the blades. It is shown that the method of electrolytic-plasma removal of coatings can be a substitute for traditional methods for removing coatings when repairing gas turbine engine blades.

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4.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-27-35
УДК 669.018.44:669.245
Shpagin A.S., Kucheryaev V.V., Bubnov M.V.
Computer simulation of thermomechanical processing of heat-resistant nickel alloys VZh175 and EP742

This article represents the results of the database development of the rheological properties related to the heat-resistant Nickel alloys VZh175 and EP742. It also shows the sequence of actions for creating of rheological model of material and checking its operability. The using of the mentioned database in the program QForm will provide the possibility of computer simulation of various processes of pressure treatment of alloys VZh175 and EP742 for the development of new technologies for obtaining deformed semi-finished products from these alloys.

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5.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-36-45
УДК 66.017
Sevostyanov N.V., Burkovskaya N.P., Bolsunovskaya T.A., Efimochkin I.Yu.
Influence of testing temperature on Ti3SiC2 titanium carbosilicide tribological properties

The tribotechnical characteristics data of materials based on titanium carbosilicide obtained by various researchers is comprised in the paper. A comparative assessment of crystal structure and lattice parameters of titanium carbosilicide in comparison with layered materials such as graphite and tetragonal boron nitride are given. The authors obtained a material based on titanium carbosilicide synthesized by spark plasma sintering. The temperature influence on friction coefficient of synthesized material was studied against counter bodies of EP866 bearing-grade steel or VK-6 hard alloy. A significant increase in the friction coefficient of titanium carbosilicide in the temperature range from 100 to 200°C has been established.

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6.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-46-55
УДК 66.017
Kuznetsova V.A., Kozlova A.A., Zheleznyak V.G., Shapovalov G.G.
Influence of elastomeric modifiers on properties of metalpolymer compositions

In work possibility of application of low molecular elastomer for updating of metal-polymeric compositions which are used as the putty is investigated. Influence of the maintenance of elastomeric modifiers in metal-polymeric composition on mechanical, technological properties, adhesive durability, and also hardness of the modified metal-polymeric compositions is investigated. It is shown that application of low molecular rubbers PDI-3AK and PPG-3A as modifiers of metal-polymeric compositions promotes increase of their elasticity.

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7.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-56-66
УДК 666.1.056
Melnikov A.A., Schur P.A.
Transparent conductive antireflective coatings based on ITO, SiO2, TiO2

Transparent conductive coatings are widely used nowadays. In this work simultaneously conductive and antireflective coatings produced within one stack of optical coating are proposed. Production method allows to receive the coatings with high uniformity on large size substrates (up to 350×500 mm). Transmittance T>93%, reflectance R<1% and surface resistance Rpov<20 Om/□ for silicate glasses with such coatings. Demonstration of electrical heating of the coatings is showed.

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8.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-67-78
УДК 620.1:629.7.023
Antipov V.V., Medvedev I.M., Kutyrev A.E., Volkov I.A.
Rapid assessment of hot water sealed anodic oxide coatings protective properties during NaCl immersion testing

Multilayer systems based on anodizing and painting are used in the aircraft industry for aluminum alloys corrosion protection. Porous anodic oxide coatings with insufficient corrosion protection properties are formed during anodizing in chromium-free electrolytes. These coatings are sealed for better corrosion protection. Hot water sealing is one of the most widely used methods to enhance aluminum anodic oxide coatings protective properties. Lengthy neutral salt spray tests (usually at least 336 h) are used for protective properties assessment. In the present study, EIS data was fitted using equivalent electrical circuits for investigation of changes in coating parameters during 3% NaCl solution immersion up to 1440–3600 h. Coatings were obtained by 1163, V-1461, V96C3p.ch. aluminum alloys anodizing in sulfuric acid water solution for 15, 30, 45 minutes, followed by hot water sealing in deionized water. Changes in impedance modulus at low frequencies (so-called «degradation function») cannot be used to assess the protective properties of sealed anodic oxide coatings. The electrochemical criterion for quick evaluation of sealed anodic oxide coatings protective properties (time to first corrosion spots) was introduced – change in capacitive parameter of sealing CPEseal-T during the first 24 h of testing in NaCl solution.

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9.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-79-89
УДК 629.7.023: 669.715
Duyunova V.A., Kozlov I.A., Oglodkov M.S., Kozlova A.A.
Modern trends in the anodic oxidation of aluminum-lithium and aluminum alloys (review)

The work is devoted to the analysis of modern scientific works in the field of application of non-metallic inorganic coatings by anodic oxidation on aluminum and aluminum-lithium alloys. The modern trends of anodic oxidation technology are considered, and the results of scientific research are compared with traditional technologies. The main attention in the analysis of scientific research is focused on the mechanism of influence of alloying elements of aluminum alloys coming to the surface, technological solutions to eliminate the use of toxic compounds in anodic oxidation and subsequent filling.

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10.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-90-97
УДК 669.017
Alekseev A.V., Rastegayeva G.Yu., Pahomkina T.N., Razmakhov M.G.
Determination sulfur, carbon, nitrogen and oxygen in alloys of system Co–Fe–Co–B and Gd–Fe–Co–B

In this paper, the alloys of Ce–Fe–Co–B and Gd–Fe–Co–B systems were analyzed for the content of gas-forming impurities. The sulfur and carbon content was determined by combustion in the induction furnace of the Leco CS-444 gas analyzer with subsequent detection in the infrared cell of the spectrometer, and for the determination of oxygen and nitrogen, the method of reducing melting in the inert carrier gas current was used, followed by detection of oxygen in the infrared cell and nitrogen in the conductometric cell of the Leco TC-600 gas analyzer. For the complete extraction of the elements to be determined, various catalysts were used – tungsten with tin, vanadium oxide, copper chips and the most suitable one was chosen.

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11.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-98-108
УДК 629.7.083
Veshkin E.A, Startsev V.O., Postnov V.I., Barannikov A.A.
The climate impacts as the assessment of maintainability of products from carbon fiber

The article is devoted to the study of mechanical characteristics and indicators of moisture transfer of monolithic and three-layer cellular samples based on carbon fiber VKU-30K.Р14535 in the initial state, after mechanical shock damage, after repair and full-scale climatic tests in a moderately warm climate. The problem of «sensitivity» of polymer composite material (PCM) to shock damage is highlighted. The results of research work on the study of the properties of a number of aircraft PCM with mechanical damage in different climatic conditions are noted.

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12.
dx.doi.org/ 10.18577/2307-6046-2019-0-8-109-118
УДК 66.017:536.24
Barinov D.Y., Ospennikova O.G., Marachovskiy P.C., Zuev A.V.
Study of heating dynamics of destructive heat protective material by the method of mathematical modeling of temperature fields

Рroposed a physical and mathematical model of heat and mass transfer in a destructive heat protective material. For modeling, the thermophysical characteristics of the material (density, thermal conductivity, heat capacity) and the kinetic parameters of degradation were studied using thermoanalytical research methods. The temperature and density fields of the destructive material were simulated during the descent of the vehicle from the earth's orbit along the model trajectory characteristic of space vehicles. The features of the heating of the sample of heat protective material and the depth of the destructed layer at the final moment of time of calculation are revealed.

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