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Aviation materials and technologies №4, 2020

DOI: 10.18577/2071-9140-2020-0-4-3-11

UDC: 620.186

Pages: 3-11

A.G. Evgenov1, S.V. Shurtakov1, S.M. Prager1, R.Yu. Malinin1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

ON THE DEVELOPMENT OF A UNIVERSAL CALCULATION METHOD FOR ASSESSING THE DEGRADATION OF RECYCLED METAL POWDER MATERIALS, DEPENDING ON THE CYCLICITY OF USE IN THE SELECTIVE LASER MELTING PROCESS

This article analyses foreign articles on the influence of the frequency of use on the level of impurities, technological characteristics of the powder in the SLM (DMLS) process and on the mechanical properties of the synthesized materials. A solution to the problem of developing a universal calculation method for evaluating degradation in the SLM process of recycled metal powder materials has been proposed. The algorithm includes the automatic correlation of the contamination factors with the corresponding exposure mode elements of each type of cross-section (contour, upskin, downskin, core) during measurement of the longitude of the laser path or the exposure duration of all elements that form the cross-section of a part.

Keywords:

selective laser melting, oxidized powder, fractional composition, exposure, laser synthesis, contour, base metal, support structures.

Reference List

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    7. Kablov E.N., Evgenov A.G., Mazalov I.S., Shurtakov S.V., Zaitsev D.V., Prager S.M. Evolution of structure and properties of high-chromium heat-resistant alloy VZh159, obtained by selective laser alloying. Part II. Materialovedeniye, 2019, no. 4, pp. 9–15. DOI: 10.31044/1684-579X-2019-0-4-9-15.
    8. Kablov E.N., Evgenov A.G., Mazalov I.S., Shurtakov S.V., Zaitsev D.V., Prager S.M. Structure and properties of EP648 and VZh159 alloys synthesized by SLS after simulation annealing. Materialovedeniye, 2020, no. 6, pp. 3–10. DOI: 10.31044/1684-579X-2020-0-6-3-10.
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    17. Kablov E.N. Innovative developments of FSUE «VIAM» SSC of RF on realization of «Strategic directions of the development of materials and technologies of their processing for the period until 2030». Aviacionnye materialy i tehnologii, 2015, no. 1 (34), pp. 3–33. DOI: 10.18577/2071-9140-2015-0-1-3-33.
    18. Tang H.P., Qian M., Liu N. et al. Effect of Powder Reuse Times on Additive Manufacturing of Ti–6Al–4V by Selective Electron Beam Melting. Journal of The Minerals, Metals & Materials Society,  2015, vol. 67, no. 3, pp. 555–563.
    19. Ardila L.C., Garciandia F., González-Díaz J.B. et al. Effect of IN718 Recycled Powder Reuse on Properties of Parts Manufactured by Means of Selective Laser Melting. Physics Procedia, 2014, vol. 56, pp. 99–107.
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    21. Ladewig A., Schlick G., Fisser M. et al. Influence of the shielding gas flow on the removal of process by-products in the selective laser melting process. Additive Manufacturing, 2016, vol. 10, pp. 1–9.
    22. Sutton A.T., Kriewall C.S., Leu M.C., Newkirk J.W. Characterization of Heat-Affected Powder Generated during the Selective Laser Melting of 304L Stainless Steel Powder. Solid Freeform Fabrication 2017: Proceedings of the 28th Annual International. Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference Reviewed Paper, 2017, pp. 261–276.
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    25. Evgenov A.G., Shurtakov S.V., Prager S.M., Malinin R.Yu. Features of contamination of recycled powder material in the process of selective laser synthesis. Tekhnologiya metallov, 2018, no. 11, pp. 21–29.
    26. Chabina E.B., Evgenov A.G., Korolev V.A., Raevskikh A.N., Filonova E.V. Features of the layer-by-layer formation of the structure of products made of heat-resistant nickel alloys with selective laser alloying. Fundamental foundations of engineering sciences: collection of scientific-popular articles. Moscow, 2017, pp. 250–261.

Full version

DOI: 10.18577/2071-9140-2020-0-4-12-18

UDC: 669.295

Pages: 12-18

A.L. Yakovlev1, A.A. Arislanov1, S.V. Putyrskiy1, N.A. Nochovnaya1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

STUDY OF MECHANICAL PROPERTIES AND STRUCTURE OF LARGE-SIZED SEMI-FINISHED PRODUCTS MADE OF VT6ch TITANIUM ALLOY

The article presents the results of a complex of studies (analysis of microstructure, as well as determination of mechanical properties under tension, impact strength (KCU), low-cycle fatigue (LCF), fracture toughness (K1с)) of large-sized forgings made of titanium alloy Vt6сh, providing for the final deformation in the (α+β)-region, as well as large-sized profiles and stamping made of titanium alloy Vt6сh, providing for the final deformation in the β-region.

A comparative analysis of the data obtained during the research shows the dependence of the mechanical properties of semi-finished products with plate-like structure on the size of the structural components – of primary β-grains and colonies of α-plates. This is especially noticeable for the characteristics of plasticity.

Keywords:

titanium alloys, large-sized semi-finished products, deformation, mechanical properties, microstructure, heat treatment.

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Full version

DOI: 10.18577/2071-9140-2020-0-4-19-26

UDC: 678.83

Pages: 19-26

E.N. Kablov1, G.S. Kulagina1, G.F. Zhelezina1, S.L. Lonskii1, E.V. Kurshev1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

MICROSTRUCTURE RESEARCH OF THE UNIDIRECTIONAL ORGANOPLASTIC BASED ON RUSAR-NT ARAMID FIBERS AND EPOXY-POLYSULFONE BINDER

This paper studies a polymer composite material - a unidirectional organoplastic based on Rusar-NT aramid fiber and a melt epoxy-polysulfone binder. Organoplastic has the following mechanical properties: tensile strength 2060 MPa, Young's modulus 101 GPa. The microstructure of the fiber and the polymer matrix in the organoplastic samples was studied before and after tensile tests. The features of the formation of the binder structure depending on the packing density of the fibers in organoplastics have been determined. The nature of the destruction of fibers and polymer matrix caused by the uniaxial tension has been studied.

Keywords:

unidirectional organoplastic, aramid fibers Rusar-NT, melt binder, microstructure

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    4. Petrova G.N., Rumyanceva T.V., Beyder E.Ya. Influence of modifying additives on fireproof properties and technological effectiveness of polycarbonate. Trudy VIAM, 2013, no. 6, paper no. 06. Available at: http://www.viam-works.ru (accessed: October 5, 2020).

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    6. Zhelezina G.F., Gulyaev I.N., Soloveva N.A. Aramide organic plastics of new generation for aviation designs. Aviacionnye materialy i tehnologii, 2017, no. S, pp. 368–378. DOI: 10.18577/2071-9140-2017-0-S-368-378.

    7. Zhelezina G.F., Voinov S.I., Solovyova N.A., Kulagina G.S. Aramid organotexolites for shock-resistant elements of aircraft structures. Zhurnal prikladnoy khimii, 2019, vol. 92, iss. 3, pp. 358–364. DOI: 10.1134/S0044461819030101.

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Full version

DOI: 10.18577/2071-9140-2020-0-4-27-34

UDC: 677.523

Pages: 27-34

A.A. Shavnev1, V.G. Babashov1, N.M. Varrik1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

CONTINUOUS FIBERS BASED ON ALUMINA (review)

The article provides an overview of the continuous alumina-based fibers currently produced as well as their production technologies, major manufacturers and applications. Ceramic fibers are relatively new species and are of particular interest at the modern stage of technology development, since their advantages make them promising in the creation of new types of composite materials. A large number of polycrystalline oxide fibers have been developed, both for refractory insulation and for reinforcing composites.

Keywords:

continuous oxide fibers, alumina, mullite, high temperature resistant, composite materials, sol-gel method.

Reference List

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    7.   Process for producing metal oxide fibers, textiles and shapes: pat. US3385915А; filed 02.09.66; publ. 28.05.68.

    8.   Method of firing dry spun refractory oxide fibers: pat. US3760049А; filed 01.03.71; publ. 18.09.73.

    9.   Non-frangible alumina-silica fibers: pat. US4047965А; filed 04.05.76; publ. 13.09.77.

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    33. Zimichev A.M., Varrik N.M., Sumin A.V. Research of the process of extrusion of continuous high-melting fibers. Trudy VIAM, 2017, no. 1 (49), paper no. 06. Available at: http://www.viam-works.ru (accessed: September 25, 2020). DOI: 10.18577/2307-6046-2017-0-1-6-6.

    34. Istomin A.V., Kolyshev S.G. Electrostatic method of forming ultrathin fibers of refractory oxides. Aviacionnye materialy i tehnologii, 2019, no. 2 (55), pp. 40–46. DOI: 10.18577/2071-9140-2019-0-2-40-46.

    35. Stepanova E.V., Zimichev A.M. Thermal insulation material for cords made of refractory oxide fibers. Trudy VIAM, 2020, no. 2 (86), paper no. 08. Available at: htpp://www.viam-works.ru (accessed: September 25, 2020). DOI: 10.18577/2307-6046-2020-0-2-72-80.

    36. Ivakhnenko Yu.A., Baruzdin B.V., Varrik N.M., Maksimov V.G. High-temperature fibrous sealing materials. Aviacionnye materialy i tehnologii, 2017, No. S, pp. 272–289. DOI: 10.18577/2071-9140-2017-0-S-272-289.

    37. Zimichev A.M., Varrik N.M. Thermogravimetric researches of alumina-based filaments. Trudy VIAM, 2014, no. 6, paper no. 6. Available at: http://www.viam-works.ru (accessed: September 29, 2020). DOI: 10.18577/2307-6046-2014-0-6-6-6.

    38. Method for producing high-temperature fiber based on aluminum oxide: pat. 2212388 Rus. Federation; filed 19.11.01; publ. 20.09.03.

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    42.       Kaya C., Butlera E.G., Selcuk A. et al. Mullite (NextelTM 720) fibre-reinforced mullite matrix composites exhibiting favourable thermomechanical properties. Journal of the European Ceramic Society, 2002, vol. 22. Р. 2333–2342.

Full version

DOI: 10.18577/2071-9140-2020-0-4-35-40

UDC: 621.357.74

Pages: 35-40

A.B. Laptev1, L.I. Zakirova1, M.L. Degovets1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

PROPERTIES OF PROTECTIVE GALVANIC COATINGS FOR REPLACEMENT OF CADMIUM ON STEEL FIXING PARTS (review) Part 2. Hydrogen embrittlement and frictional characteristics

The paper considers the options for replacing the electroplated single-layer toxic cadmium coatings with zinc-based compositions, as well as multi-layer coatings. Their tribological characteristics and tendency to hydrogenation of the protected metal during coating and operation are considered. Conclusions are drawn about the shortcomings of existing technologies and promising directions of research in this area. Thus, the most preferred composition for replacing a cadmium coating is a nickel-zinc coating with  nickel content of 12% (by weight), but a tin-zinc coating has the lowest value of the coefficient of friction, close to the value for cadmium.

 

Keywords:

steel fasteners, zinc alloy coating, hydrogen embrittlement, tribological characteristics.

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Full version

DOI: 10.18577/2071-9140-2020-0-4-41-46

UDC: 621.763

Pages: 41-46

O.G. Devoino1, A.P. Pilipchuk2

[1] Belarusian National Technical University
[2] The Educational Establishment «Military Academy of the Republic of Belarus»

SPECIFIC FEATURES OF GAS-FLAME SPRAYING OF ULTRA-HIGH MOLECULAR POLYETHYLENE ON PARA-AMID FABRIC

The analysis of methods for increasing the ballistic resistance of para-aramid fabrics has been carried out. The defining value of friction between the threads of ballistic fabric, which contributes to the deformation of the bullet and its stopping, is noted. The expediency of using gas-flame spraying to create coatings from UHMWPE on the surface of para-aramid fabrics has been substantiated. The choice of material and equipment for gas-thermal spraying has been made. The technological parameters of gas-thermal spraying of UHMWPE on the surface of para-aramid fabrics have been determined. It is shown that the use of gas-flame spraying makes it possible to create surface layers of arbitrary shape.

Keywords:

ultra-high molecular weight polyethylene (UHMWPE), gas-thermal spraying, coating, para-aramid fabric, technological parameters.

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Full version

DOI: 10.18577/2071-9140-2020-0-4-47-58

UDC: 519.6:620.1

Pages: 47-58

E.N. Kablov1, V.O. Startsev1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

MEASUREMENT AND FORECASTING OF MATERIALS SAMPLES’ TEMPERATURE DURING WEATHERING IN DIFFERENT CLIMATIC ZONES

The relation between standard meteorological parameters and surface temperature of samples exposed directly to the sun and in a sheltered environment has been studied using 6–8-year timeframe. The following materials have been used: KMKU-3.150.U0.1 carbon fiber reinforced polymer, KMKS-4.175.Т10 glass fiber reinforced polymer,  and D16-AT aluminum alloy substrate with black and white EP-140 epoxy coating . Outdoor weathering has been conducted at Gelendzhik and Moscow testing sites of the All-Russian Institute of Aviation Materials (VIAM). It has been shown that it′s possible to use a multilinear model to estimate the temperature of the materials′ surfaces during their weathering in different climatic regions. The following parameters for 1–12 months’ timeline have been used to estimate samples’ temperature at different locations: air temperature, total solar radiation, solar declination, and solar hour angle.

Keywords:

 carbon fiber reinforced polymer, glass fiber reinforced polymer, epoxy coating, surface temperature, prognosis, multilinear model, meteorological parameters, validity.

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    39. Startsev O.V., Lebedev M.P., Kychkin A.K. Aging of polymer composite materials in an extremely cold climate. Izvestiya Altayskogo gosudarstvennogo universiteta, 2020, no. 1 (111), pp. 41–51.
    40. Laptev A.B., Nikolayev E.V., Kolpachkov E.D. Thermodynamic characteristics of aging of polymeric composite materials under conditions of real exploitation. Aviaсionnye materialy i tehnologii, 2018, no. 3, pp. 80–88. DOI: 10.18577/2071-9140-2018-0-3-80-88.

Full version

DOI: 10.18577/2071-9140-2020-0-4-59-70

UDC: 620.178.35

Pages: 59-70

V.S. Erasov1, E.I. Oreshko1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

FATIGUE TESTS OF METAL MATERIALS (review) Part 1. Main definitions, loading parameters, representation of results of tests

The article gives the review of techniques of fatigue tests of metal materials and presents the results of such tests . It has been shown that the low-cyclic fatigue occurs in conditions of elastoplastic deformation in material microvolume from the first cycles of loading. Its distinctive feature is influence on durability of the size and form of a mechanical hysteresis loop . Nucleation of fatigue microcracks and formation of the main crack occurs on the surface and in near-surface layers of a sample.

Keywords:

fatigue tests, endurance, fatigue crack, cyclic fracture strength, deformation.

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Full version

DOI: 10.18577/2071-9140-2020-0-4-71-78

UDC: 536.24

Pages: 71-78

D.Ya. Barinov1, P.S. Marakhovskij2, A.V. Zuev1

[1] Federal State Unitary Enterprise «All-Russian Scientific Research Institute of Aviation Materials»
[2] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

MATHEMATICAL MODELING OF DESTRUCTION OF FIBERGLASS-BASED THERMAL-PROTECTION MATERIAL 

The paper proposes physical and mathematical models of heat and mass transfer in fiberglass used as a destructive heat-shielding material for capsule type descent vehicles. To provide the mathematical model with the initial data, experimental studies of the thermophysical characteristics of the material and the kinetic parameters of destruction have been carried out. There has been made a simulation of the destruction of a material sample during descent in the Earth's atmosphere along a typical trajectory for various areas of the heat shield; as a result, the dependences of temperatures on the flight time and the depth of the coked layer have been determined.

Keywords:

destruction, thermal protection, mathematical model, temperature fields, charred depth.

 

Reference List

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    8. Kablov E.N. Innovative developments of FSUE «VIAM» SSC of RF on realization of «Strategic directions of the development of materials and technologies of their processing for the period until 2030». Aviacionnye materialy i tehnologii, 2015, no. 1 (34), pp. 3–33. DOI: 10.18577/2071-9140-2015-0-1-3-33.
    9. Kutsevich K.E., Dementeva L.A., Lukina N.F. Properties and application of polymer composite materials based on glue prepregs. Trudy VIAM, 2016, no. 8, paper no. 7. Available at: http://www.viam-works.ru (accessed July 9, 2020). DOI: 10.18577/2307-6046-2016-0-8-7-7.
    10. Barinov D.Ya., Prosuntsov P.V. Modeling of heat transfer in the layer of decomposing material of the heat-protective coating of the descent vehicle. Vestnik MGTU im. N.E. Bauman. Ser.: Mechanical engineering, 2016, no. 6, pp. 22–32. DOI: 10.18698/0236-3941-2016-6-22-32.
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Full version

DOI: 10.18577/2071-9140-2020-0-4-79-85

UDC: 620.1

Pages: 79-85

N.O. Iakovlev1, A.A. Selivanov1, I.V. Gulina1, A.V. Grinevich1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

REVISITING THE DURABILITY OF HINGED-BOLT CONNECTIONS

The paper considers the issue of durability of hinged-bolt joints under the influence of a corrosive environment. There has been performed the analysis of the stress-strain state of the eyes’ material in the preloaded joints. Possibility of corrosion cracking of the eyes in case of exposure to a corrosive medium has been determined. Experimental confirmation of The destruction of the eyes’ material in a preloaded joint has been confirmed experimentally. The article proposes the development of the testing methodology of structural materials under the prolonged exposure to constant stress and corrosive medium under the conditions of a given deformation.

Keywords:

hinged-bolt connection, eye, corrosive medium, preload, corrosion cracking.

Reference List

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Full version

DOI: 10.18577/2071-9140-2020-0-4-86-94

UDC: 620.193

Pages: 86-94

M.G. Abramova1

[1] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials»

REVISITING THE CONFIRMATION OF THE IDENTITY OF THE CORROSION DESTRUCTION MECHANISM OF ALUMINUM ALLOYS (review) Part 1. Atmospheric corrosion

The paper presents a review of accelerated methods of corrosion research of aluminum alloys; the destruction mechanism in these methods is similar with that one in corrosion in natural conditions.   The kinetics of the development of corrosion processes, the correspondence of absolute values of corrosion damage, their types and degree of development, the nature of corrosion damage and surface morphology, the nature of the fracture, and the analysis of the composition of corrosion products are considered as criteria of identity.

Keywords:

corrosion mechanism, corrosion, full-scale climatic tests, full-scale accelerated tests, accelerated laboratory tests, aluminum alloys.

Reference List

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    2. Abramova M.G., Lutsenko A.N., Varchenko E.A. Concerning the aspects of validation of climate resistance of airborne materials at all life cycle stages (review). Aviacionnye materialy i tehnologii, 2019, no. 4 (58), pp. 86–94. DOI: 10.18577/2071-9140-2020-0-1-86-94.
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