Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-3-14
УДК 544.344:621.762:669.245
Kablov E.N., Letnikov M.N., Ospennikova O.G., Bakradze M.M., Shestakova A.A.
Particulars of the precipitation strengthening γʹ-phase during aging of heat-resistant wrought nickel superalloy VZh175-ID

The effect of aging at various temperatures on the size, morphology of the strengthening particles of the γʹ-phase and the mechanical properties of the heat-resistant wrought nickel superalloy VZh175-ID was studied. It is shown that the hardening effect during aging at different temperatures varies and depends on the microstructure which formed in the alloy VZh175-ID superalloy at the quenching stage. The excellent tensile strength and strength to rupture is achieved when small spherical or cuboid secondary γʹ-phase and nanosized tertiary γʹ-phase are formed in the structure.

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2.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-15-25
УДК 669.245
Kuzmina N.A., Lifshitz V.A., Potrakhov E.N., Potrakhov N.N.
Comparative structure control of single-crystal castings of nickel superalloys X-ray diffraction methods of oscillation and Laue

The article compares the possibilities of x-ray swing and Laue methods for mass control of the structure perfection of single-crystal castings of nickel heat-resistant alloys. It is concluded that both methods give similar results in determining the axial orientation of single crystals. In determining the misalignment of the block substructure, the swing method allows us to find the axial deviation of each block relative to the Z axis of the sample, that is, relative to the direction of the main acting voltage, and the Laue method allows us to calculate the angles of disorientation of the blocks relative to the orientation of the main crystal. The advantage of the method of Laue in determining the angle of disorientation blocks, as it allows you to test the disorientation of casting blocks of complex shape.

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3.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-26-37
УДК 669.295
Ospennikova O.G., Lukin V.I., Afanasiev-Khodykin A.N., Galushka I.A.
Technology of the high temperature diffusive brazing of a bimetallic «blisk» design

The article presents the results of the development a manufacturing technology for the construction type «blisk» design constructed with a permanent joint with the method of a high-temperature diffusion brazing. The brazing alloy for brazing nickel-based superalloys in bimetallic combinations, that provide a long-term strength of the brazing joint at the level of strength 0,8–0,9 from the least durable of the materials was developed. The influence of heat treatment on microstructure and strength of the brazing joint was investigated. The technology of brazing bimetallic nickel-based superalloys for «blisk» design was developed. Test of a bimetallic specimen of a «blisk» design demonstrator was carried out.

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4.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-38-46
УДК 669.295
Zakharova L.V.
Solid-metal embrittlement of titanium alloy VT20 in contact with silver, zinc and cadmium

On the example of an alloy VT20 the problem of solid-metal embrittlement of titanium alloys in contact with silver, zinc and cadmium in the solid state was considered. The influence of the contact density of the surface of titanium alloy with metals, temperature and duration of tests, as well as the application of external tensile stresses were investigated. Temperature thresholds and incubation periods of cracking of VT20 alloy in contact with the studied metals were determined. Studies of fractures of titanium samples and analysis of the chemical composition of their surface after testing were carried out.

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5.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-47-56
УДК 665.939.5
Petrova A.P., Lukina N.F., Rubtsova E.V., Isaev A.Yu.
The effect of reinforcing epoxy film adhesive VK-51 with non-woven fibrous material on its properties

The properties of VK-51 high-strength film adhesive are given. The effect of reinforcement with nonwoven fabric based on mylar and viscose fibers on the properties of VK-51 adhesive is shown and the properties of reinforced adhesive (VK-51A) are given. A comparison of the properties of VK-51A adhesive with an imported analogue of AF-126 adhesive is given. The effect of the adhesive primer EP-0234 on the resource characteristics of adhesive joints made with VK-51A adhesive in combination with soil is shown.

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6.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-57-63
УДК 665.939.5
Petrova A.P., Lukina N.F., Isaev A.Yu.
Operability of glued joints on epoxy film adhesives at simultaneous influence of loadings and climatic factors

Reviewed the performance of adhesive joints made of epoxy film adhesives VK-31, VK-41 and MC-51, while the impact of conditions of warm humid climate of Black sea coast and loads of 0.2–0.5 of the original strength of the adhesive joints. It is shown that the level of remaining strength after exposure to the above conditions affects not only the initial strength of the adhesive joints, but also the temperature at which the curing of the adhesive. Adhesive bonding for all three adhesives showed a high level of retained strength after exposure to climatic conditions of warm moist climate of Black sea coast and loads.

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7.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-64-72
УДК 678.7
Semenova S.N., Suleymanov R.R., Chaykun A.М.
Mixing ethylene-propylene-diene and methylphenylsiloxane rubbers in the formulation of cold and ozone resistant rubber

The possibility of using ethylene-propylene-diene (SKEPT-40) and methylphenylsiloxane (SKTFV-803) rubbers in the formulation of cold-resistant and ozone-resistant rubber was investigated. The optimal ratio of rubber in the rubber mixture, mixing method and vulcanizing system are proposed. The elastic-strength and thermo cold-resistant characteristics of vulcanizates were determined. It is shown that the investigated rubber based on EPDM and SKTFV has improved physicomechanical and cold-resistant indicators compared to the sealing rubber IRP-1375 based on a mixture of ethylene-propylene and butadiene-styrene rubbers.

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8.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-73-79
УДК 678.747.2
Malakhovskiy S.S., Mishkin S.I.
The main trends of receiving and applications secondary carbon fibres (review)

Describes the modern methods of extracting carbon reinforcing fibers from polymer composite materials. The most popular methods are solvolysis and pyrolysis. Presents specific products from recycled carbon fiber and firms that specialize in this area of production. It is shown that the most popular method of manufacturing using recycled carbon fiber is 3D-printing from granules based on a thermoplastic polymer.

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9.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-80-88
УДК 678.8
Gunyaeva A.G., Veshkin E.A, Antyufeeva N.V., Panafidnikova A.N., Efimik V.A.
Research of influence of the condensation moisture on carbon fiber plastic prepreg on the basis of solution epoxy binder and PCM on its basis

The influence of condensation moisture of prepreg of carbon fiber reinforced plastic based on mortar epoxy resins on its reactivity and the properties of cured polymeric composite material was done, including the condensation moisture that is formed when conditions in the refrigerator or freezer are violated. Prepreg PU-4e-2m used in mass productionon the basis of a solution epoxy binder and carbon fiber reinforced plastic based on its KMU-4E-2m were considered as objects for research. Experimental DSC curves with detailed rheokinetic description the behavior of the analyzed prepregs were obtained. Properties of CFRP KMU-4e-2m based on thermostated and non-thermostated PU-4e-2m prepreg were investigated.

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10.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-89-99
УДК 539.262
Nazarkin R.M.
Small-sized X-ray diffractometers for structure and phase analysis purposes (review)

This review on the modern devices of a x-ray difraktometry which are available on commercial sale in the territory of the Russian Federation, is prepared for research scientists and engineering personnel, students and postgraduate students. The review will be useful to the experts conducting researches and development in the field of metallurgy, materials science, technology of materials, a crystallography and solid state physics. The principal schemes and methods of diffraction experiments are considered, the technical characteristics and exterior of desktop x-ray diffractometers are presented.

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11.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-100-107
УДК 620.1:678.8
Laptev A.B., Golubev A.V., Kireev D.M., Nikolaev E.V.
To the question of biodegradation of polymeric materials in natural environments (review)

One of the main components of plastic waste is the polymer polyethylene terephthalate (PET), which causes a variety of environmental problems associated with its accumulation, sorption and concentration of organic pollutants, causing dangerous consequences for marine life, spreading potentially invasive species of microorganisms. The study of biocenoses formed on the surface of PET in various regions, industries, water bodies and other local objects, different environmental conditions, will significantly predict and prevent premature destruction of infrastructure under the influence of biological degradation and destruction of materials.

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12.
dx.doi.org/ 10.18577/2307-6046-2019-0-9-108-126
УДК 66.017:620.1
Oreshko E.I., Erasov V.S., Grinevich A.V., Shershak P.V.
Review of criteria of durability of materials

In work the analysis of various criteria of durability for isotropic, orthotropic and anisotropic materials is carried out. Applied approaches are described at calculation of durability of fibrous and layered composite materials. Criteria are considered: Mises, Pisarenko–Lebedev, William–Warnke, Drucker–Prager, Bazant, Norris, Cunze, Goldenblat–Kopnov, Tsai–Hill, Tsai–Wu, Hashin, LaRC, Hoffman, Puck, criteria of durability sandwich of panels, etc. The review of strength criteria of the materials used in the ANSYS Mechanical APDL program is presented.

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