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Aviation materials and tecnologes №1, 2020

DOI: 10.18577/2071-9140-2020-0-1-3-11

UDC: 669.014.018.8

Pages: 3-11

E.N. Kablov1, M.M. Bakradze1, V.I. Gromov1, N.M. Voznesenskaya1, N.A. Yakusheva1

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

NEW HIGH STRENGTH STRUCTURAL AND CORROSION-RESISTANT STEELS FOR AEROSPACE EQUIPMENT DEVELOPED BY FSUE «VIAM» (review)

 

One of the main tasks in creating perspective aircraft products is the increasing of the weight efficiency and reliability of the parts; this is achieved through the development of new materials with improved mechanical characteristics in comparison with analogues.

To solve the issue of ensuring a long service life of an airframe and engine parts, including gas turbine engine shafts and bearing parts, FSUE «VIAM» has developed new heat-resistant high-strength structural and corrosion-resistant steels with increased characteristics of strength, toughness, fatigue life and heat resistance, as well as technologies for their production, heat and chemical-thermal treatment.

Keywords: high strength steel, corrosion, bearing, deformation, chassis, engine, mechanical properties, nitrogen, thermochemical treatment, fatigue, tensile strength.

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Full version

DOI: 10.18577/2071-9140-2020-0-1-12-18

UDC: 669.018.44:669.245

Pages: 12-18

P.N. Medvedev1, A.I. Gulyaev1

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

ANALYSIS OF THE SPATIAL DISTRIBUTION OF CRACKS IN A HEAT-RESISTANT NICKEL ALLOY MANUFACTURED USING SLM TECHNOLOGY

The samples of the heat-resistant nickel alloy ZhS6K-VI, obtained by the method of selective laser alloying, on which cracks grids were detected under certain modes of the process, were investigated. The analysis of the distribution of orientation of cracks in the plane of sample construction is carried out. The analysis of the residual stresses and the texture state of the samples. An analysis of the reasons for the oriented nature of the formation of cracks showed that the main factor is the gradient of the temperature field along the track border, as well as the redistribution of residual stresses.

 

Keywords: selective laser melting (SLM), nickel alloys, cracks, image processing, skeletonization, residual stress.

Reference List

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Full version

DOI: 10.18577/2071-9140-2020-0-1-19-29

UDC: 669.715:669.884

Pages: 19-29

M.S. Oglodkov1, N.D. Shchetinina1, A.S. Rudchenko1, M.D. Panteleev1

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

DIRECTIONS OF THE DEVELOPMENT OF PROMISING ALUMINUM-LITHIUM ALLOYS FOR AEROSPACE ENGINEERING (review)

This article provides a review of publications in the field of the development and application of modern aluminum-lithium alloys in the construction of aircraft and space technology products. The review summarizes the research that are devoted to the influence of alloying elements, parameters of heat treatment and pressure treatment on phase composition, structure and properties of semi-finished products and products from Al–Cu–Li based alloys of the new generation. The most promising methods for welding these alloys, such as friction stir welding and laser welding, are also discussed.

 

Keywords: Al–Cu–Li based alloys, alloying, phase composition, aging strength, corrosion resistance, mechanical properties.

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    53. Betsofen S.Ya., Sbitneva S.V., Panteleev M.D., Bakradze M.M., Dolgova M.I., Kabanova Yu.V. Investigation of the formation of the phase composition of an alloy of the Al–Cu–Li B-1469 system during friction welding with stirring. Metally, 2018, no. 6, pp. 54–63.

    54. Romanenko V.A., Klochkova Yu.Yu., Klochkov G.G., Burlyaeva I.P. Extruded panel from aluminum-lithium alloy V-1469. Trudy VIAM, 2016, no. 8, paper no.0 1. Available at: http://www.viam-works.ru (accessed: April 11, 2019). DOI: 10.18577/2307-6046-2016-0-8-1-1.

    55. 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.

    56. Lukin V.I., Kulik V.I., Betsofen S.Ya., Lukina E.A., Sharov A.V., Panteleyev M.D., Samorukov M.L. Friction stir welding of high-strength aluminum-lithium V-1469 alloy semiproducts. Trudy VIAM, 2017, no. 12 (60), paper no. 2. Available at: http://viam-works.ru (accessed: May 1, 2019). DOI: 10.18577/2307-6046-2017-0-12-2-2.

     

Full version

DOI: 10.18577/2071-9140-2020-0-1-30-37

UDC: 669.245

Pages: 30-37

E.N. Kablov1, O.S. Kashapov1, P.N. Medvedev1, T.V. Pavlova1

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

STUDY OF A α+β-TITANIUM ALLOY BASED ON A SYSTEM OF Ti–Al–Sn–Zr–Si–β-STABILIZING ALLOYING ELEMENTS

The article reviews the results of experimental studies of α+β forged bars from a titanium alloy based on a composition of Ti–Al–Sn–Zr–Si–β-stabilizing alloying elements. The characteristic feature of this alloy is the quite high level of β-stabilizing alloying elements. The alloy composition was selected in order to obtain a rhombic martensite after water quenching. The studies were carried out on α+β forged bars at temperatures of the single-phase region. X-ray phase analyses of the bar material were carried out after quenching, aging and annealing. The characteristics of strength and the microstructure of the material were examined.

Keywords: titanium alloys, martensite, strength, microstructure, solid-solution hardening, precipitation hardening.

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    2. Pavlova T.V., Kashapov O.S., Kondrateva A.R., Kalashnikov V.S. Opportunities to expand the VT8-1 alloy application for disks and compressor rotor wheels. Trudy VIAM, 2016, no. 3 (39), paper no. 05. Available at: http://www.viam-works.ru (accessed: September 25, 2019). DOI: 10.18577/2307-6046-2016-0-3-5-5.

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    12. Zhang X.D., Evans D.J., Baeslack W.A., Fraser H.L. Effect of long term aging on the microstructural stability and mechanical properties of Ti–6Al–2Cr–2Mo–2Sn–2Zr alloy. Materials Science and Engineering, 2003, vol. A344, pp. 300–311.

    13. Kashapov O.S., Pavlova T.V., Kalashnikov V.S., Kondrateva A.R. Research of influence of alloying elements content on properties of high strength near alpha heat resistance titanium alloy VT46. Trudy VIAM, 2016, no. 9, paper no. 06. Available at: http://www.viam-works.ru (accessed: September 25, 2019). DOI: 10.18577/2307-6046-2016-0-9-6-6.

    14. Putyrsky S.V., Arislanov A.A., Yakovlev A.L., Nochovna N.A. Studing of mechanical properties of deformed semi-finished products of VT23M and VT43 alloys, assessment of their climatic stability in the Arctic climate. Trudy VIAM, 2018, no. 4 (64), paper no. 12. Available at: http://www.viam-works.ru (accessed date: September 25, 2019). DOI: 10.18577/2307-6046-2018-0-4-101-110.

    15. Moiseev V.N. High-strength titanium alloys in aircraft construction, 2001, 13 p. Available at: https://viam.ru/public/files/2001/2001-203458.pdf (accessed: August 31, 2019).

    16. Kashapov O.S., Pavlova T.V., Kalashnikov V.S., Zavodov A.V. The phenomenon of formation and low-temperature diffusion transformation of metastable solid solutions with the release of dispersed particles of intragranular Widmanstatten alpha phase in heat-resistant titanium Trudy VIAM, 2018, no. 8 (68), paper no. 01. Available at: http://www.viam-works.ru (accessed: September 25, 2019). DOI: 10.18577 / 2307-6046-2018-0-8-3-22.

    17. Kablov E.N. The key problem is materials. Tendentsii i oriyentiry innovatsionnogo razvitiya Rossii. Moscow: VIAM, 2015, pp. 458–464.

    18. 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.

    19. Kablov E.N., Kashapov O.S., Pavlova T.V., Nochovna N.A. Development of a pilot industrial technology for the manufacture of semi-finished products from pseudo-α-titanium alloy VT41. Titan, 2016, no. 2 (52), pp. 33–42.

    20. Kablov E.N. Materials of a new generation - the basis of innovation, technological leadership and national security of Russia. Intellekt i tekhnologii, 2016, no. 2 (14), pp. 16–21.

    21. Kablov E.N. VIAM materials and technologies for Aviadvigatel. Permskiye aviatsionnyye dvigateli, 2014, no. 31, pp. 43–47.

    22. Vacuum Melting and Remelting processes: ASM Handbook. ASM International, 2008, vol. 15: Casting, 1226 p. DOI: 10.31399/asm.hb.v15.9781627081870.

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    24. Davydenko L.V., Egorova Yu.B., Chibisova E.V. Statistical comparison of the mechanical properties of titanium alloys of different classes. Izvestiya MGTU «MAMI», 2013, vol. 2, no. 1 (15), pp. 35–38.

    25. Gupta R.K., Kumar V.A., Chhangani S. Study on Variants of Solution Treatment and Aging Cycle of Titanium Alloy Ti6Al4V. Journal of Materials Engineering and Performance, 2016, vol. 25, pp. 1492–1501. DOI: 10.1007/s11665-016-1993-8.

Full version

DOI: 10.18577/2071-9140-2020-0-1-38-44

UDC: 669.295

Pages: 38-44

A.V. Peskova1, D.I. Sukhov1, P.B. Mazalov1

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

EXAMINATION OF THE FORMATION OF THE TITANIUM ALLOY VT6 STRUCTURE OBTAINED BY ADDITIVE MANUFACTURING

The review of additive manufacturing is presented. The initial metal powder composition was examined in order to determine the microstructure, chemical composition and particle size distribution. Metallographic research of sintered titanium alloy VT6 samples was carried out. The samples were produced by selective laser melting (SLM), direct laser deposition (DLD) and selective electron-beam melting (SEBM) methods. The results were compared with those obtained by the traditional methods.

Keywords: titanium alloy, direct laser deposition, selective laser melting, microstructure, metal powders.

Reference List

    1. 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.

    2. Kablov E.N. VIAM materials and technologies for Aviadvigatel. Permskiye aviatsionnyye dvigateli, 2014, no. 31, pp. 43–47.

    3. Gu D.D., Meiners W., Wissenbach K., Poprawe R. Laser Additive Manufacturing of Metallic Components: Materials, Processes, and Mechanisms. International Materials Reviews, 2012, vol. 57, pp. 137–164.

    4. Solomonov V.V., Turichin G.A., Zemlyakov E.V., Babkin K.D., Klimova-Kosmirik O.G. Direct laser growing of products from powder materials: principle, equipment and materials. Tekhnicheskiye nauki v Rossii i za rubezhom: materialy VI Mezhdunar. nauch. konf. Moscow: Buki-Vedi, 2016, pp. 34–37.

    5. Kablov E.N. At the crossroads of science, education and industry. Ekspert, 2015, no. 15 (941), pp. 49–53.

    6. Solomonov V.V. Direct laser growing from titanium alloys: a comparison of methods for producing products from powder and wire. Tekhnicheskiye nauki: problemy i perspektivy: materialy VI Mezhdunar. nauch. konf. Saint-Petersburg: Svoye izdatelstvo, 2018, pp. 44–49.

    7. Inozemtsev A.A., Bashkatov I.G., Koryakovtsev A.S. Titanium alloys in products developed by Aviadvigatel OJSC. Sovremennye titanovye splavy i problemy ikh razvitiya. Moscow: VIAM, 2010, pp. 43–46.

    8. Dudikhin D.V., Saprykin A.A. Methods for producing spherical powders for additive laser technologies. Masters Journal, 2016, no. 1, pp. 51–55.

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    10. Popov A.S., Baranov D.A., Diagovtsov I.A., Murzin S.P., Shchedrin E.Yu. Comparative metallographic studies of samples obtained by direct laser growing technology. Mashinostroyeniye i mashinovedeniye, 2017, no. 1, pp. 1101–1105.

    11. Panin P.V., Dzunovich D.A., Alekseev E.B. Ways of phase areas representation in titanium alloys additionally doped with hydrogen (review). Trudy VIAM, 2015, no. 3, paper no. 03. Available at: http://www.viam-works.ru (accessed: September 03, 2019). DOI: 10.18577/2307-6046-2015-0-3-3-3.

    12. Panin P.V., Dzunovich D.A., Alekseev E.B. Phase composition and structure of hydrogenated titanium alloy VT6 after vacuum annealing. Trudy VIAM, 2016, no. 2 (38), paper no. 05. Available at: http://www.viam-works.ru (accessed: September 03, 2019). DOI: 10.18577/2307-6046-2016-0-2-5-5.

    13. Baufeld B., Biest O., Gault R., Ridgway K. Manufacturing Ti – 6Al – 4V components by Shaped Metal Deposition: Microstructure and mechanical properties. IOP Conference Series: Materials Science and Engineering, 2011, vol. 26, pp. 9–13. DOI: 10.1088/1757-899X/26/1/012001.

    14. Dovbysh V.M., Zabednov P.V., Zlenko M.A. Additive technologies and metal products. Moscow: NAMI, 2015, pp. 29–31.

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    16. Horev A.I. Titanium alloys for aerospace engineering and the prospect of their development. Aviacionnye materialy i tehnologii, 2002, vyp.: Perspektivnyye alyuminiyevyye, magniyevyye i titanovyye splavy dlya aviakosmicheskoy tekhniki, pp. 11–32.

    17. Nocturnal N.A., Panin P.V. Phase composition and structure formation in VT5, VT20, and VT6 titanium alloys upon thermo-hydrogen treatment and plastic deformation. Trudy VIAM, 2017, no. 9, paper no. 01. Available at: http://www.viam-works.ru (accessed: September 29, 2019.). DOI: 10.18577 / 2307-6046-2017-0-9-1-1.

Full version

DOI: 10.18577/2071-9140-2020-0-1-45-53

UDC: 669.018.95

Pages: 45-53

V.V. Antipov1, N.Yu. Serebrennikova1, A.N. Konovalov1, Yu.N. Nefedova1

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

PERSPECTIVES OF APPLICATION OF FIBER METAL LAMINATE MATERIALS BASED ON ALUMINUM ALLOYS IN AIRCRAFT DESIGN

 

The article presents the mechanical characteristics of  fiber metal laminates based on thin sheets of aluminum and aluminum-lithium alloys and polymer layers consisting of adhesive binders with high-strength high-modulus reinforcing fibers (glass, organic, carbon). Advantages, possibilities of application and disadvantages of each type of materials are shown: ALOR aluminum organoplastics, ALKAR aluminum carbon plastic, SIAL aluminum glass plastic and their foreign analogues ARALL, CARALL and GLARE.

Keywords: fiber metal laminates, hybrid material, aluminum fiber-glass material, Aramid Aluminium Laminate, Carbon Reinforced Aluminium Laminate, Al–Li alloy.

Reference List

    1. Betsofen S.Ya., Antipov V.V., Knyazev M.I. Alloys of the Al–Cu–Li and Al–Mg–Li systems: phase composition, texture, and anisotropy of mechanical properties (review). Deformatsiya i razrusheniye materialov, 2015, no. 11, pp. 10–26.

    2. Lynch S.P., Wanhill R.J., Byrnes R.T., Bray G.H. Fracture toughness and fracture modes of aerospace aluminum-lithium alloys. Alluminum-lithium alloys. Processing, properties and applications, Elsivier Inc., 2014, pp. 416–456.

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    4. Gunyaev G.M., Zhelezina G.F., Ilchenko S.I. Layered metal-polymer composites based on aluminum and titanium alloys. Aviacionnye materialy i tehnologii, 2002. Vyp.: Polimernye kompozitsionnyye materialy, pp. 50–58.

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    6. Podzhivotov N.Yu., Kablov E.N., Antipov V.V., Erasov V.S., Serebrennikova N.Y., Abdullin M.R., Limonin M.V. Laminated metal-polymeric materials in structural elements of aircraft. Inorganic Materials: Applied Research, 2017, vol. 8 (2), pp. 211–221. DOI: 10.1134/S2075113317020198.

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    8. Gunnink J.W., Vlot A., De Vries T.J., Van Der Hoeven W. GLARE technology development 1997–2000. Applied Composite Materials, 2002, vol. 9, is. 4, pp. 201–219.

    9. Gunnink J.W. Hybrid Structures, The New Standard for Advanced Primary Aircraft Structures. AeroMat 2007: 25 Years of Aerospace Evolution: Materials, Design, Manufacturing, Certification (Baltimore, June 25–28, 2007), 2007, pp. 10.

    10. Kablov E.N. Innovative developments of FSUE «VIAM» SSC of RF on implementation 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.

    11. Postnov V.I., Senatorova O.G., Karimova S.A., Pavlovskaya T.G., Zhelezina G.F., Kazakov I.A., Abramov P.A., Postnova M.V., Kotov O.E. Features of the formation of large-sized sheets of metal-polymer KM, their structure and properties. Aviacionnye materialy i tehnologii, 2009, no. 4, pp. 23–32.

    12. Postnov V.I., Senatorova O. G., Zhelezina G. F., Kazakov I. A., Abramov P. A., Gerasimov V. A., Postnova M. V. The experience of using MPKM ALOR D16/41 in the bow of the wing of the An-124-100 aircraft. Aviacionnye materialy i tehnologii, 2009, no. 4, pp. 8–17.

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    17. Voinov S.I., Zhelezina G.F., Soloviev N.A. The influence of the starting components on the mechanical characteristics of the laminated metal-polymer composite material «aluminum–carbon fiber». Materialovedenie, 2017, no. 5, pp. 38–42.

    18. Voinov S.I., Zhelezina G.F., Ilyichev A.V., Solovyova N.A. Investigation of the mechanical characteristics of a layered metal-polymer composite material based on aluminum sheets and carbon fiber layers. Voprosy materialovedeniya, 2018, no. 4 (96), pp. 86–96.

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    21. Almeida R.S., Damato C.A., Botelho E.C. et al. Effect of surface treatment on fatigue behavior of metal / carbon fiber laminates. Journal of Materials Science, 2008, no. 43, pp. 3173–3179.

    22. Voinov S.I., Zhelezina G.F., Pavlovskaya T.G., Volkov I.A. The problem of contact corrosion when creating layered metal-polymer composite materials based on aluminum and carbon fiber. Voprosy materialovedeniya. 2016, no. 1 (85), pp. 127–133.

    23. Voinov S.I., Zhelezina G.F., Volkov I.A., Solovyova N.A. Corrosion inhibitors in fiber-metal laminates based on aluminum and carbon fiber reinforced plastics. Trudy VIAM, 2017, no. 4 (52), paper no. 06. Available at: http://www.viam-works.ru (accessed: August 25, 2019). DOI: 10.18577/2307-6046-2017-0-4-6-6.

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    27. Kablov E.N., Antipov V.V., Senatorova O.G., Lukina N.F. A new class of laminated aluminum-glass-reinforced plastics based on aluminum-lithium alloy 1441 with reduced density. Vestnik MGTU im. N.E. Baumana, ser.: Engineering, 2011, no. SP2, pp. 174–184.

    28. Oreshko E.I., Erasov V.S., Podzhivotov N.Yu., Lutsenko A.N. Strength calculation of hybrid wing panel on the basis of sheets and profiles from high-strength aluminum lithium alloy and laminated aluminum fiberglass. Aviacionnye materialy i tehnologii, 2016, no. 1 (40), pp. 53–61. DOI: 10.18577/2071-9140-2016-0-1-53-61.

    29. Fridlyander I.N. Modern aluminum, magnesium alloys and composite materials based on them. Metallovedeniye i termicheskaya obrabotka metallov, 2002, no. 7, pp. 24–29.

    30. Vlot A., Grunnink J.W. Fiber Metal Laminates an introduction. Kluwer Academic Publishers, 2001, pp. 527.

    31. Parka S.Y., Choi W.J., Choi C.H., Choi H.S. Effect of drilling parameters on hole quality and delamination of hybrid GLARE laminate. Composite Structures, 2018, vol. 185, pp. 684–698.

    32. Borgonje B., Ypma M.S. Long term behavior of GLARE. Applied Composite Materials, 2003, no. 10, pp. 243–255.

    33. Heinimann M., Bucci R., Kulak M., Garratt M. Improving damage tolerance of aircraft structures through the use of selective reinforcement. Proceedings of the 23rd Symposium of International Committee on Aeronautical Fatigue, 2005, pp. 197–208.

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    35. Duyunova V. A., Nechaykina T. A., Oglodkov M. S., Yakovlev A. L., Leonov A. A. Promising developments in the field of light materials for modern aerospace engineering. Tekhnologiya legkikh splavov, 2018, no. 4, pp. 28–43.

    36. 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. Trudy VIAM, 2019, no. 1 (73), paper no. 05. Available at: http://viam-works.ru (accessed: June 17, 2019). DOI: 18577/2307-6046-2019-0-1-40-46.

    37. Podzhivotov N.Yu., Kablov E.N., Antipov V.V., Erasov V.S., Serebrennikova N.Yu. and other Layered metal-polymer materials in the structural elements of aircraft. Perspektivnye materialy. 2016, no. 10, pp. 5–19.

Full version

DOI: 10.18577/2071-9140-2020-0-1-54-63

UDC: 666.762.14

Pages: 54-63

V.G. Babashov1, V.G. Maksimov1, N.M. Varrik1, O.N. Samorodova1

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

STUDYING OF STRUCTURE AND PROPERTIES OF SAMPLES OF CERAMIC COMPOSITE MATERIALS ON THE BASIS OF MULLITE

In this abstract the phase composition and structure of mullite-based ceramic composite materials  modified with zirconium oxide (including those containing alumina fiber) obtained by pressing, impregnation and heat treatment methods have been examined using х-ray and local х-ray spectral analysis methods, as well as scanning electron microscopy. Physical and mechanical properties of the samples were examined. Analysis of the fracture surface of the samples revealed defects that had reduced the mechanical strength of the material. Materials of this class are promising for use as heat-protective materials, as well as heat resistant structural materials for various equipment units operating at high temperatures.

Keywords: ceramic composite material, mullite, zirconia, fiber, matrix, heat-resistant ceramic composite, alumina-silica fibers.

Reference List

    1. Kablov E.N. At the crossroads of science, education and industry. Ekspert, 2015, no. 15 (941), pp. 49–53.

    2. Evdokimov S.A., Shchegoleva N.E., Sorokin O.Yu. Keramicheskiye materialy v aviatsionnom dvigatelestroyenii (obzor). Trudy VIAM, 2018, no. 12 (72), paper no. 06. Available at: http://www.viam-works.ru (accessed: May 24, 2019). DOI: 10.18577/2307-6046-2018-0-12-54-61.

    3. Kablov E.N. Russia needs new generation materials. Redkiye zemli, 2014, no. 3, pp. 8–13.

    4. Kablov E.N. Materials of a new generation – the basis of innovation, technological leadership and national security of Russia. Intellekt i tekhnologii, 2016, no. 2 (14), pp. 16–21.

    5. Grashchenkov D.V. Strategy of development of non-metallic materials, metal composite materials and heat-shielding. Aviacionnye materialy i tehnologii, 2017, no. S, pp. 264–271. DOI: 10.18577/2071-9140-2017-0-S-264-271.

    6. Buchilin N.V., Lyulyukina G.Yu. Characteristics of sintering of highly porous alumina-based ceramic materials. Aviacionnye materialy i tehnologii, 2016, no. 4 (45), pp. 40–46. DOI: 10.18577/2071-9140-2016-0-4-40-46.

    7. Bao Y., Nicholson P. AlPO4-coated Mullite/Alumina Fiber Reinforced Reaction-bonded Mullite Composites. Journal of the European Ceramic Society, 2008, vol. 28, no. 16, pp. 3041–3048.

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    15. Babashov V.G., Butakov V.V., Basargin O.V., Nikitina V.Yu., Shcheglova T.M. The estimation of VTI-16 anisotropy by comparison tensile strength of the samples, cut out in the longitudinal and cross direction. Trudy VIAM, 2015, no. 7, paper no. 09. Available at: http://www.viam-works.ru (accessed: May 24, 2019). DOI: 10.18577/2307-6046-2015-0-7-9-9.

Full version

DOI: 10.18577/2071-9140-2020-0-1-64-69

UDC: 666.7

Pages: 64-69

A.V. Sokolov1, G.I. Deynega1, N.A. Kuzmina1

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

INFLUENCE OF Sc2O3 ADDITIVE ON SINTERING TEMPERATURE AND PROPERTIES OF ZrO2–Y2O3 SYSTEM OXIDE CERAMIC

Ceramics of the ZrO2–Y2O3 system possesses a number of unique properties and finds a wide application in the production of parts of gas turbine engines assembly units. Therefore demanding requirements are imposed on it for refractory properties and resistance to melts. However the ceramics of this system has a significant drawback – high sintering temperature, which makes it difficult to widely use it in enterprises engine building due to the lack of the necessary equipment. In this paper we consider possibility of lowering the sintering temperatures of
ZrO2–Y2O3 system ceramics by means of introduction of a sintering additive Sc2O3.

Keywords: refractory, oxide ceramics, sintering additives, yttrium oxide, zirconium oxide, scandium oxide.

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Full version

DOI: 10.18577/2071-9140-2020-0-1-70-78

UDC: 666.7

Pages: 70-78

I.O. Belyachenkov1, N.E. Schegoleva1, A.S. Chainikova1, M.L. Vaganova1, A.A. Shavnev1

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

THE INFLUENCE OF SINTERING AND MODIFYING ADDITIVES ON THE SINTERING PROCESS AND THE PROPERTIES OF SILICON NITRIDE CERAMICS

The samples of silicon nitride ceramics with complex sintering additions of oxides (Al2O3+Y2O3, Al2O3+CeO2)were obtained by hot pressing. Samples’ relative density is more than98%. Modifying addition of multi-wall carbon nanotubes (MWNTs) used for reducing the coefficient of friction.It was revealed that intensive sintering of samples with the addition of Al2O3+Y2O3 starts at lower temperature than sintering of samples with sintering composition Al2O3+CeO2. The addition of MWNTs also increases the sintering temperature. It was determined that the adding MWNTs to silicon nitride ceramics with the sinteringaddition of Al2O3+Y2O3 reduces the friction coefficient in a pair with steel, but at the same time it led to an increase of the wear and tear of the ceramic material.

Keywords: silicon nitride, carbon nanotubes, dry lubricants, hot pressing, hybrid bearings.

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Full version

DOI: 10.18577/2071-9140-2020-0-1-79-85

UDC: 536.631:620.19

Pages: 79-85

Yu.V. Loshchinin1, S.I. Pakhomkin1, M.G. Razmakhov1

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

PHASE TRANSFORMATION TEMPERATURES AND CALORIMETRIC ANALYSIS OF POWDER COMPOSITIONS OF NICKEL-BASED SUPERALLOYS

In this paper we were able to determine the temperatures of phase transformations by the DSC method in the temperature range from 20 to 1400 °C and to measure  specific heat capacity by the method of adiabatic calorimeter during heating the powder compositions of nickel-based superalloys EP648, VZh159, VZh171 and intermetallic nickel-based alloys VIN5 and VIN6, used in additive technologies. There were determined the temperature intervals of formation and the following destruction with corresponding exothermic and endothermic thermal effects of zones of heterogeneous γ-solid solution (K-condition) of nonequilibrium structure of  nickel-based superalloys powder. Temperatures of allocation and the beginning of dissolution of the strengthening γ'-phase during heating were determined. The comparison with the measurement results  of cast billets samples was carried out.

Keywords: specific heat capacity, differential scanning calorimeter, adiabatic calorimeter, exothermic and endothermic thermal effects, heterogeneous γ-solid solution.

Reference List

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    2. Nazarkin R.M., Petrushin N.V., Rogalev A.M. The structure and phase characteristics of ZhS32-VI alloy manufactured by directional solidification, granular metallurgy and selective laser melting. Trudy VIAM, 2017, no. 2 (50), paper no. 02. Available at: http://www.viam-works.ru (accessed: June 06, 2019). DOI: 10.18577/2307-6046-2017-0-2-2-2.

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Full version

DOI: 10.18577/2071-9140-2020-0-1-86-94

UDC: 620.193.2

Pages: 86-94

M.G. Abramova1, A.N. Lutsenko1, E.A. Varchenko1

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

CONCERNING THE ASPECTS OF VALIDATION OF CLIMATE RESISTANCE OF AIRBORNE MATERIALS AT ALL LIFE CYCLE STAGES (review)

The paper reviews the key issues of climate qualification of airborne materials and ways to solve them in order to increase the durability of materials under the influence of the environment to ensure the reliable operation of aircraft products for a given service life. The main directions of the development of metallic materials’ climatic tests have been formed; they are aimed at the  prevention of accidents due to corrosion damageas well as at the    increase of safe operation and economic efficiency.

 

Keywords: climatic qualification, corrosion, full-scale tests, full-scale accelerated tests.

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    2. Lutsenko A.N., Course M.G., Laptev A.B. Justification of the terms of full-scale climatic tests of metallic materials in the atmosphere of the Black Sea coast. Analytical review. Voprosy materialovedeniya, 2016, no. 3 (87), pp. 126–137.

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