Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-3-14
УДК 621.791
Kablov E.N., Antipov V.V., Sviridov A.V., Gribkov М.S.
Features of electron beam welding of heat-resistant alloys EI698-VD and EP718-ID with steel 45

The technology of electron beam welding of heat-resistant alloys EI698 and EP718 with steel 45 was developed. A complex of metallographic studies of welded samples was carried out. Tests to determine the mechanical characteristics of welded joints showed that the welded joints made by electron beam welding are equal to the strength of the base metal – of steel 45. A specially designed joint design allowed to reduce emissions of the weld metal and to ensure the absence of cracks under the upper expanded part of the weld. Conducted non-destructive testing of welds showed the absence of unacceptable defects in welds.

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2.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-15-26
УДК 678.073
Pykhtin A.A., Sorokin A.E., Kraev I.D., Voronov V.A.
The choice the of the thermosetting binder composition modified by active nanoparticles of LSNO ceramics, for impregnation of thermoplastic templates obtained by FDM-printing

Within the framework of this work, the synthesis technology was developed and the characterization of complex nickelate ceramics of the composition La15/8Sr1/8NiO4 (LSNO) was carried out by the method of х-ray phase analysis. Research has been carried out to identify the regularities of the influence of the chemical nature of the polymer matrix on the complex of technological, physical-mechanical and electrophysical properties of nanocomposites modified with LSNO. The effect of surfactants (surfactants) of different brands on the stability and rheological characteristics of nanodispersions based on the previously selected oligomer was investigated and the optimal content of ceramic nanoparticles and surfactants for each of the systems was determined. The rheological and physical-mechanical properties of the obtained dispersions and polymer nanocomposites based on them have been determined. Research has been carried out and the concentration dependences of the electrophysical properties of samples of cured nanocomposites have been determined.

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3.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-27-34
УДК 665.939.5
Isaev A.Yu., Pavlyuk B.Ph., Petrova A.P., Lukina N.F., Balabanova O.S.
Effect of modification of cold cured epoxy adhesives with elastomers on the resource strength of adhesive joints

Comparative data on characteristics of the adhesive joints executed by epoxy adhesive of cold curing VK-9 (not modified) and VK-27 (modified by rubber) are provided. It is shown that updating of epoxy adhesive of cold curing by rubber leads to increase of strength, deformation and resource characteristics of glued joints, however heat resistance of adhesive joints decreases. Comparison of properties of the adhesive joints executed by adhesives VK-9 and VK-27 is given, at influence of loadings, temperatures, humidity and other factors.

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4.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-35-43
УДК 678.026
Venediktova M.A., Petrova A.P., Barbotko S.L., Bryk Ya. А.
Application of new environmentally friendly organophosphorus flame retardants in the composition of heat-protective putty

In work the assessment of possibility of replacement of Fospoliol-II as a part of heat-protective putty on new environmentally friendly organophosphorus flame retardants of domestic production for the purpose of decrease in toxicity and environmental pollution when manufacturing and processing has been carried out. The comparative assessment of ecological safety of flame retardants, and also mechanical, thermophysical characteristics of heat-protective putty with Fospoliolom-II and new fire-retarding agents is carried out.

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5.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-44-51
УДК 678.8678.8
Kolobkov A.S.
Influence of non-woven thermoplastic materials on the strength of layered polymer composite materials (review)

Рrovides an overview of the work carried out to find ways to increase the interlayer effects in polymer composite materials and in particular shock loads. Discusses the use of nanofibersveils in the manufacture of laminated CFRP and the change in strength characteristics of the obtained materials, depending on different surface density nanofiber veils and their chemical composition. There is a General tendency to increase the interlayer strength in carbon fiber when using nanofiber veils with a slight decrease in the elastic modulus.

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6.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-52-60
УДК 669.018.95
Serpova V.M., Sidorov D.V., Shavnev A.A., Kurbatkina E.I., Krasnov E.I.
Crack propagation in metal matrix composites system Ti–SiC under cyclic loads (review)

The article presents a literature review of the features of crack development in fibrous metal composite materials (MCMs) system Ti–SiC under cyclic loads. The mechanisms that provide resistance to crack development and factors affecting the process of crack growth in fibrous MCMs system Ti–SiC are presented. The influence of temperature, frequency, and medium on the development velocity of a crack in fibrous MCMs system Ti–SiC under the action of cyclic loads is considered. In conclusion, of the review, conclusions are drawn and it is shown that the development of a fatigue crack and its resistance to growth in MCMs system Ti–SiC are associated with the structural features of the material.

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7.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-61-67
УДК 678.747.2
Gusev Y.A., Tverdaya O.N.
The effect of calendaring clearance on maintaining the strength characteristics of carbon fiber when impregnating a unidirectional prepreg

The results of work carried out at FSUE «VIAM» within the framework of studies of the effect of the gap of calenders on the preservation of the properties of carbon fiber during impregnation of a unidirectional prepreg are presented. The tensile strength properties of CFRP based on a unidirectional prepreg made without and with a gap of calenders are presented. As a result, it can be concluded that, for the selected objects of study, such a technological parameter as a gap, when impregnating unidirectional materials, does not affect the preservation of the strength characteristics of carbon fiber.

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8.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-68-77
УДК 678.8
Satdinov R.A., Veshkin E.A, Postnov V.I., Savin S.P., Kulikov V.V.
Design and technological improvements of creation of space-complex constructions from PCM

The basic technologies for manufacturing complex parts from polymer composite materials (PCM) are considered. Technological techniques have been tested – from researching the properties of the prepreg filler to manufacturing the part, from modeling the master model to manufacturing the rigging exactly repeating the theoretical contour of the part, from choosing the technology to its implementation in the manufacture of pipeline elements from PCM for air conditioning in aircraft. The thermocompression method for obtaining spatially complex АСS elements has been developed.

A study of the obtained parts of hard currency for tightness and compliance with the requirements of AP-25 for combustibility was carried out. The selected technological methods allowed the production of parts with specified characteristics that meet the requirements for them.

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9.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-78-86
УДК 621.793
Duyunova V.A., Nikiforov A.A., Terkulova Y.A., Yaroshevskaya V.N., Kozlov I.A.
Electrolyte correction methods for Ni–B chemical coating system

A chemically deposited nickel coating containing boron atoms is not inferior to chrome coatings in terms of wear resistance and protective ability. Nickel-plated electrolytes have a high, in comparison with chromium-plating electrolytes, scattering ability, which contributes to the uniform distribution of the coating on parts of complex configuration. The work investigated the effect of electrolyte adjustments on the appearance, microstructure and microhardness indicators of the Ni–B coating, and also determined the phase composition of the sample coatings before and after electrolyte adjustment. The developed technology for correcting the spent solution for the chemical coating of Ni–B makes it possible to increase its productivity during the coating process.

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10.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-87-95
УДК 628.517.699.844
Sagomonova V.A., Dolgopolov S.S., Tselikin V.V., Sorokin A.E.
Investigation of the effect of an integrated vibration-absorbing layer on the properties of composite three-layer soundproofing sandwich panels

Presents the results of a study of the influence of the presence of an integrated vibration absorbing layer on the physical and vibration damping properties of the experimental samples of composite heat- and soundproofing panels of various compositions and structures. The factors affecting the level of properties of the manufactured experimental samples of composite heat- and soundproofing panels are established. The influence of the composition and structure of experimental samples of composite heat- and soundproofing panel on its characteristics is analyzed.

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11.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-96-104
УДК 629.7.023.222
Kuznetsova V.A., Marchenko S.A., Zheleznyak V.G., Emelyanov V.V.
Influence of the spatial structure of reinforcing fillers on the properties of the paint coatings

The influence of the spatial structure of reinforcing fillers, such as ZnO and BN filamentous crystals of zinc oxide, as well as their content in an epoxy-polyamide polymer matrix on adhesion, physical and mechanical properties, water absorption and erosion resistance, was studied. It is shown that coatings containing ZnO filamentous crystals in their composition, which are clear spatial tetrahedra of four single crystals emerging from a single center, have a higher elastic coating under tension, as well as resistance to erosion compared to similar coatings containing BN filamentous crystals with a needle-like structure.

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12.
dx.doi.org/ 10.18577/2307-6046-2020-0-9-105-114
УДК 620.1938:669.715
Varchenko E.A., Kirichok P.F.
Research of the biological and corrosion resistance of samples of aluminum alloy after natural tests in the Gelenjik bay. Part 2

Sea water – one of the most common and corrosive environments, being a finely balanced salt solution containing, among other things, organics, living organisms and dissolved gases, which leads to the multifactorial nature of this exposure condition.

This work is devoted to assessing the productivity of marine biota in 6 monitoring points of the Gelendzhik bay and coastal high seas with a quantitative assessment of fouling and mechanical properties of samples of aluminum alloy AMg6 with and without biofouling during the summer exposure.

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