Archive - Электронный научный журнал "ТРУДЫ ВИАМ"

Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-3-13
УДК 669.15
Krylov S.А., Makarov А.А., Druzhnov M.A.
Study of high-strength low-alloy steel with super-equilibrium nitrogen content

In continuation of joint work of FSUE «VIAM» and IMET RAN named after Baikov, in the field of obtaining low-alloy steels with increased mechanical properties with a super-equilibrium nitrogen content, the mechanical properties, structure, and chemical composition of the obtained steel were studied. It is shown that steel 10KH3A with a super-equilibrium nitrogen content (up to 0,2) electroslag remelting under pressure DESHP-0,1 (FSUE «VIAM») provides a high level of properties (ultimate strength 1670 MPa) while maintaining high mechanical characteristics (elongation 10%, constriction 50%).

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2.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-14-22
УДК 669.017.165:669.295
Zavodov A.V., Medvedev P.N., Nochovnaya N.A.
Formation features of adiabatic shear bands during hot compression of VTI-4 alloy and subsequent annealing

Textural and macrostructural changes in the intermetallic titanium alloy VTI-4 based on the orthorhombic phase (Ti2AlNb) during hot high-rate compression and subsequent recrystallization annealing where studied. The main attention is paid to the formation features of localized deformation bands (LDB) in the central zone of the compressed sample, which are one of the signs of unstable and nonuniform deformation. It is shown that recrystallization annealing after hot compression does not eliminate the LDB and the compression texture. Reasons for this behavior of the material are studied applying the analysis of the solid solution state.

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3.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-23-34
УДК 677.53
Farafonov D.P., Serov M.M., Patrushev A.Yu., Leschev N.E., Yaroshenko A.S.
Metal fibers for new aircraft engine materials

Presents the results of work carried out at the Federal state unitary enterprise «VIAM» in the framework of a new material science direction – metallurgy of metal fibers. This work was made possible by the development of a method for producing metal fibers called the hanging melt drop extraction method (EUCR). This method is high-performance and allows you to obtain fibers from almost any material. Research has shown that it is possible to improve the performance and environmental characteristics of modern and advanced engines by introducing new classes of materials based on metal fibers.

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4.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-35-46
УДК 669.018.292
Panteleev M.D., Sviridov A.V., Skupov A.A., Odintsov N.S.
Perspective welding technologies of aluminum-lithium alloy V-1469 applied to fuselage panels

In this work, we investigated the technological features of promising technologies for laser welding and friction stir welding of high-strength aluminum-lithium alloy V-1469. The modes of laser welding and friction stir welding have been carried out. In this article, we showed the perspective welding methods provide high values of ductility and impact toughness, while the strength of welded joints is not less than 0,8 of the strength of the base material and values of low cycle fatigue is not less than 110·103 cycles. The results allows to propose laser welding and friction stir welding processes as an alternative to riveted joint for aluminum-lithium alloy V-1469 as applied to the elements of the fuselage.

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5.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-47-58
УДК 678.8
Sidorina A.I., Safronov A.M., Kutsevich K.E., Klimenko O.N.
Carbon fabrics for aircraft products

Current information about the nomenclature of woven reinforcing fillers for composite materials (CM) with a polymer matrix produced at production facilities of FSUE «VIAM», located on the basis of the Voskresensk experimental and technological center for special materials is presented. The main properties of manufactured carbon and hybrid fabrics, promising areas of their application, as well as the main properties of commercially produced and experimental composites based on polymer matrices and woven fillers of FSUE «VIAM» are presented. The directions of further expansion of the range of manufactured woven reinforcing fillers for CM with a polymer matrix are marked.

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6.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-59-66
УДК 678.747.2
Mishkin S.I., Malakhovskiy S.S., Gunyaeva A.G., Gulyaev I.N.
Features of definition the resin content in carbon fiber reinforced plastics based on various types of carbon fillers by thermo-oxidative destruction method

Research results on definition the mass content of the resin by thermo-oxidative destruction method in constructional CFRP based on the carbon medium-modulus carbon fillers, woven carbon fillers from high-strength fibers and epoxy polymeric matrix are presented. It is shown, which carbon composite materials the thermo-oxidative destruction method is applicable to determine the resin content and possibility application thermo-oxidative method in inert environment is tested. The analysis of the received results is carried out.

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7.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-67-74
УДК 678.7
Tkachuk A.I., Zagora A.G., Donetskiy K.I., Evdokimov A.A.
Polymeric matrixes for composite materials used in the construction of quickly built bridge structures

The main physico-chemical, thermomechanical and strength characteristics of the epoxy-vinyl-ester polymeric matrixes of the VSV-41 and VSV-43 brands developed at FSUE «VIAM» are considered. It is established that the time of technological viability of these polymeric matrixes in the temperature range of 20–25 °C is 120–130 minutes, which allows them to be processed into products made of polymer composite materials (PCM) of sufficiently large dimensions. Infusion polymeric matrixes of the VSV-41 and VSV-43 brands have similar bending strength indicators, but PCM based on the VSV-43 polymeric matrix have a wider range of operating temperatures. Based on these polymeric matrixes, carbon fiber of the VKU-51 brand, as well as fiberglass of the VPS-58 and VPS-60R brands were developed and certified. In addition, they are used in the manufacture of sheet pilings and supports of arched elements, as well as profiled flooring of structures of a quickly built arch bridge made of composite materials, built in the settlement of Yazykovo in the Ulyanovsk region.

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8.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-75-86
УДК 629.7.023.224
Khmeleva K.M., Kozlov I.A., Nikitin Ya.Yu., Nikiforov A.A.
Modern trends of protective galvanic coatings working at high temperatures (review)

Provides an overview of foreign scientific and technical literature in the field of protective galvanic coatings for heat-resistant alloys based on nickel and γ-TiAl. Various types and systems of alloying of galvanic coatings are considered, which can be used to protect parts of the hot part of gas turbine engines from high-temperature sulfide-oxide corrosion at operating temperatures up to 1000 °С. Data on the influence of the deposition technology, electrolyte composition, additives on the properties of coatings, the morphology of individual coatings, as well as the results of corrosion tests of some coatings are presented.

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9.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-87-95
УДК 678.026
Kuznetsova V.A., Shapovalov G.G., Marchenko S.A., Kovrizhkina N.A., Silaeva A.A.
Paint coatings on the basis of epoxy and acrylic diphasic polymeric system for coloring of elements of cabin of pilots and dashboards

Influence of the maintenance of filler on adhesion, physicomechanical properties, and also shine of the coverings received on the basis of epoxy and acrylic of film-forming, cured by organic silicon ammine and low-molecular polyamide in initial condition and after artificial aging on the cycle LI-14 (-60D+100) is investigated by °С. Hardness and scratch resistance of systems of coverings on the basis of the developed opaque enamels which in comparison with serial system on the basis of first coat AK-070 and opaque HS-5245 enamel have shown the best results is investigated.

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10.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-96-107
УДК 629.7.023.222
Kovrizhkina N.A., Kuznetsova V.A., Silaeva A.A., Emelyanov V.V.
Alternatives to chromate pigments (review)

The review of the researches concerning search of alternative to chromate pigments is provided. Among possible alternatives various connections are considered: cerium salts (in a mix with other non-chromate pigments), compounds of phosphorus, including organic (oxyaminophosphates and oxyethylidenediphosphonates), conductive polymers (polyaniline and polipirrol) and core pigments on their basis, compounds of transitional metals (vanadium, tungsten, molybdenum, manganese, etc.). It is shown that correctly picked up mix of pigments of inhibitive type is capable to provide the level of protective properties which is not conceding to coverings, containing chromate pigments.

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11.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-108-115
УДК 620.179
Boychuk A.S., Dikov I.A., Generalov A.S., Yakovleva S.I.
The features of non-destructive inspection of carbon fiber reinforced plastic solid laminate samples during low-cyclic fatigue testing

The results of CFRP samples ultrasonic inspection during low-cyclic fatigue testing are  given in this article. It is established that for ultrasonic pulse-echo inspection during cycling mechanical testing and after the special correction of flaw detector’s gain and inspection’s sensitivity concerning back-wall echo decreasing in compare with testing specimen is necessary.

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12.
dx.doi.org/ 10.18577/2307-6046-2020-0-12-116-124
УДК 678.84
Beljaev А.А., Bespalova E.E.
Features of measurement of reflective factor in superhigh frequencies by means of analyzers of chains

Features of measurement of factors of reflection of radio absorbing materials by means of analyzers of chains at super-high frequencies are described. Results of measurements of one of standard radio absorbing materials with use of the analyzer of chains are given and comparison with results of measurements by means of a measuring instrument of KSVN panoramic is carried out them. By results of the carried-out measurements conclusions are drawn on possibility of use of the described methods of measurements of factors of reflection of radio absorbing materials.

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