Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-3-12
УДК 669.018.44:543.42
Raevskih A.N., Chabina E.B., Petrushin N.V., Filonova E.V.
Boundary between single-crystal substrate and received by selective laser melting alloy ZhS32-VI structural and phase changes after high temperatures and tension influence investigation

By Scanning Electron Microscopy (SEM) and Electrons Back Scattering Diffraction (EBSD) means sample structure in transitional area between single-crystal ZhS32-VI alloy substrate with crystallographic orientation <001> and alloy ZhS32-VI, received on the same substrate by selective laser melting, after traction tests at temperature 1100°С is investigated. Structural changes in local subgrains disorientation sites, caused by microtension raised level are established.

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2.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-13-20
УДК 678.6
Prokopova L.A., Golovina E.Yu.
About the technological properties stability of type I epoxy resins after the warranty period expiration

Test methods for two important quality properties of type I epoxy resins produced by Russian industry are described. The reasons to select the specific research methods are noticed. The epoxy content and the dynamic viscosity of expired type I epoxy resins are determined. It was found that highly purified expired type I epoxy resins preserve their technological properties for a long time subject to the storage conditions.

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3.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-21-30
УДК 678.4
Chaykun A.М., Venediktova M.A., Bryk Ya. А.
Development of the compounding of rubber extremely high heat resistance with temperature range of exploitation from the -60 to +500°С

In some cases, products of special purpose require application of sealing details on the basis of the elastomer, capable to provide working capacity at high temperatures at least short time. The choice for the specified purposes of rubbers is caused by unique highly elastic properties of the elastomer, allowing providing the hard contact of surfaces at small pressing effort. Besides, in this case process of assembly and forming of seal assembly in products of difficult configuration considerably becomes simpler. Application for these purposes of more heat-resistant metals or fluoroplastic is connected with considerable technological difficulties. The solution of the specified problem is impossible without development of compounding of rubber, ability to provide necessary technical characteristics in the expanded temperature range. Besides, features of creation of compounding and property of the specified rubber in many respects define both approaches to development and choice of optimum options of manufacturing techniques of products from it. The declared approaches will allow not only developing rubber with considerably improved complex of properties, but also in the maximum degree to keep them upon transition to manufacturing of specific products.

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4.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-31-39
УДК 678.072, 678.078
Kudryavtseva A.N., Tkachuk A.I., Grigoreva K.N., Gurevich Y.M.
The use of epoxy resin system VSE-30, processed by the infusion technology, for the manufacture of low and medium loaded structural polymer composite materials

In the present work, the main physicochemical and thermomechanical characteristics of a two-component epoxy resin system VSE-30, processed by infusion technology and developed at the FSUE «VIAM», are considered. The DSC method is used to study the kinetic parameters of the curing process and to study the effect of the final curing temperature on the level of mechanical and thermomechanical properties of the cured binder VSE-30. The comparison of obtained data with domestic and foreign analogues are given. It has been established that lowering the curing temperature has little effect on the total thermal effect of the reaction. The optimum curing mode of the epoxy resin system VSE-30 at a low temperature is chosen, which allows to obtain materials with a slight decrease in their glass transition temperature and strength properties.

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5.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-40-46
УДК 669.715
Antipov V.V., Konovalov A.N., Serebrennikova N.Yu., Somov A.V., Nefedova Yu.N.
Influence of structure on fire resistance and fireproof FMLs SIAL-type and possibility of application of data of materials in aircraft industry

A method of fire resistance testing subject to foreign and national regulations of materials made for fire dangerous areas in aircraft engineering was developed. Different compositions of aluminum fiber-glass materials based on 1441 Al–Li alloy sheets were tested to determine a fire-resistance value. Recommendations of forming an aluminum fiber-glass material to enhance a fire resistance level are stated. Technological process of manufacturing of aviation details with requirements of fire resistance is described through the example aircraft engine cowling prototype manufacture.

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6.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-47-54
УДК 678.8
Kolobkov A.S., Malakhovskiy S.S.
Self-healing composite materials (review)

Examined methods of modification polymer matrix for increasing their impact and crack resistance with domination modification via encapsulated agents and compounds, that able to react in DielsAlder reaction. Described approaches for increasing service life and efficiency thermoset composite materials, containing healing agents and releasing through growth the crack or another damages in cured polymer matrix and reversible self-regulation chemical bonds in DielsAlder reaction.

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7.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-55-63
УДК 678.8
Donetskiy K.I., Karavaev R.Y., Raskutin A.E., Dun V.A.
Carbon fibers composite material on the basis of volume reinforcing triax braiding preformes

In work it is considered carbon fibers composite on the basis of volume reinforcing triax braiding preformes, made in the way of vacuum infusion with use of the molten epoxy binding. Possible scopes of such material and its physicomechanical properties are given. It is shown that when manufacturing the designs working at influence of outside hydrostatic pressure, important task is decrease in their weight and dimensional characteristics. Application carbon fibers composite on the basis of volume reinforcing braiding preformes will allow to improve weight characteristics that will lead in turn to increase of technical characteristics of made designs.

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8.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-64-73
УДК 66.017
Zagora A.G., Kondrashov S.V., Antyufeeva N.V., Pykhtin A.A.
Research of influence of technological modes of production of epoxy nanocomposites with carbon nanotubes on their heat resistance

In work the temperature and time mode of hardening of the studied epoxy compositions which provided its almost full course was chosen. Therefore, temperature change of vitrification as a result of the conducted researches is explained by exclusively modifying action of carbon nanotubes. It is shown that the three-roll mixer plays a key role in the technological modes of production of epoxynanocomposites. Non-functional multiwall carbon nanotubes (MWCNTs) with its help considerably increase heat resistance of epoxy compositions.

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9.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-74-91
УДК 677.523
Shestakov A.M., Khaskov M.A., Sorokin O.Ju.
Organosilicon polymer compounds based inorganic fibers for high-temperature composite materials (review)

This article discusses the main types of organosilicon polymer compounds based inorganic fibers, produced abroad, for high-temperature composite materials of various nature. The methods for producing organosilicon polymer compounds and fibers are briefly described. Also, the effect of the nature of the organosilicon polymer and the method of producing fibers on their physical and mechanical properties, phase composition and thermal-oxidative stability is shown. The prospects for the use of fibers as reinforcing filler for high-temperature composites are shown.

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10.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-92-104
УДК 678.067.5
Melnikov D.A., Petrova A.P., Gromova A.A., Sokolov I.I., Raskutin A.E.
The calculation of the ratio of the components of the prepreg stamps VPS-53/120, determination of physico-mechanical and operational characteristics of GRP

Process of selection of ratio of components of prepreg is described. The data on electrochemical corrosion in the contact zone of «metal–carbon» fiber and describes a method of protection against contact corrosion by isolating the carbon-plastic metal layer prepreg GRP. The initial components of prepreg GRP VPS-53/120, designed to prevent contact corrosion between metal and carbon fiber, were selected. Two methods for calculating the surface density of the binder and prepreg are described. The ranges of permissible dispersion of the surface densities of the binder and prepreg film are calculated taking into account the dispersion of the surface density of GRP and the selected range of the binder content in the prepreg. The actual values of the prepreg characteristics of the VPS-53/120 brand are determined and their statistical analysis is carried out, the high convergence of the actual values with the calculated ones is shown. Physical-mechanical and operational characteristics of GRP of the VPS-53/120 brand are defined.

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11.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-105-114
УДК 678.8
Minibaev M.I., Raskutin A.E., Goncharov V.A.
Peculiarities of technology production specimens of PCM on CNC machines (review)

The polymer composite materials industry is in constant development, however, PCM processing technologies must be developed, and the effects of mechanical processing on the properties of the material after processing should be investigated. Manufacturers of tools offer special cutters, differing in the materials from which they are made, geometry, grinding angles, etc. It is necessary to conduct research for each brand of material in order to designate the optimal cutting mode. The design of the equipment should provide reliable protection of personnel and take into account the properties formed during the processing of chips.

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12.
dx.doi.org/ 10.18577/2307-6046-2019-0-1-115-124
УДК 620.1:669.295
Ospennikova O.G., Naprienko S.A., Avtaev V.V.
Influence of sea water on fatigue limit of alloy VT3-1 at different load ratio

On specially developed samples of VT3-1 alloy, it was experimentally established that the sea water leads to an increase of fatigue limit under symmetrical loading cycle, under conditions of cyclic stretching and cyclic compression.

By the method of scanning electron microscopy it was found that under the conditions of cyclic compression the development of fatigue cracks is accompanied by the formation of a faceted relief of the forming trickle with longitudinal folds. When tested in sea water facets have a fragile appearance, while in the air on their surface there are signs of plastic deformation. With a symmetrical loading cycle and cyclic stretching, fatigue grooves are formed in sea water, as in the air atmosphere.

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