Authors

Authors named	Position, academic degree
FSUE «All-Russian scientific research institute of aviation materials» SSC of RF; e-mail:admin@viam.ru
Maria G. Abramova	Head of Laboratory, Candidate of Sciences (Tech.)
Evgeny N. Azarovsky	First Category Engineer
Vladimir G. Babashov	Chief of Laboratory, Candidate of Sciences (Tech.)
Michail M. Bakradze	Deputy Director General for metallic materials, Candidate of Sciences (Tech.)
Dmitriy Ya. Barinov	Second Category Engineer
Oleg V. Basargin	Leading engineer
Ruslan A. Valeev	Head of Laboratory, Candidate of Sciences (Tech.)
Aleksey V. Vostrikov	Head of Scientific-Research Bureau, Candidate of Sciences (Tech.)
Dmitry S. Gorlov	Leading engineer
Valery I. Gromov	Deputy Head of Laboratory of Scientific, Candidate of Sciences (Tech.)
Kirill I. Donetsky	Deputy Head of Laboratory, Candidate of Sciences (Chem.)
Oleg N. Doronin	Deputy Head of Laboratory of Scientific, Candidate of Sciences (Tech.)
Viktor V. Emelyanov	Еngineer
Vladimir S. Erasov	Leading Researcher, Candidate of Sciences (Tech.)
Vyacheslav G. Zheleznyak	Head of Laboratory, Candidate of Sciences (Tech.)
Alexander M. Zimichev	Head of Sector, Candidate of Sciences (Tech.)
Andrey V. Zyev	Deputy Head of Laboratory, Candidate of Sciences (Tech.)
Roman Yu. Karavaev	Head of Sector
Dmitry V. Korolev	Senior Researcher, Candidate of Sciences (Chem.)
Aleksey S. Kochetkov	Head of Sector, Candidate of Sciences (Tech.)
Lavrentiy L. Krasnov	Chief Researcher, Candidate of Sciences (Tech.)
Vera A. Kuznetsova	Head of Sector, Candidate of Sciences (Tech.)
Andrey A. Leonov	Leading Engineer
Sergey A. Marchenko	Engineer
Roman B. Morgunov	Leading Researcher, Doctor of Sciences (Phys. & Math.)
Evgeniy I. Oreshko	Senior Researcher, Candidate of Sciences (Tech.)
Vadim P. Piskorskii	Deputy Head of Laboratory of Scientific Work, Doctor of Sciences (Tech.)
Dmitry N. Romanenko	Leading Engineer
German S. Sevalnev	Leading Engineer
Elena V. Stepanova	Senior Researcher, Candidate of Sciences (Tech.)
Ivan V. Terekhov	Researcher, Candidate of Sciences (Chem.)
Anatoly I. Tkachuk	Head of Sector, Candidate of Sciences (Chem.)
Denis A. Utkin	Technician
Nikolai O. Iakovlev	Head of Laboratory, Candidate of Sciences (Tech.)
Natalya A.Yakusheva	Head of Sector
JSC «UEC-Aviadvigatel»; e-mail: office@avid.ru
Natalya N. Cherkashneva	Chief metallurgist – Head of department of chief metallurgist
JSC «Vyksa Metallurgical Plant»; e-mail: vzm@vsw.ru
Kirill A. Udod	Chief Specialist, Candidate of Sciences (Tech.)
PJSC «UEC-Kuznetsov»; e-mail: motor@kuznetsov-motors.ru
Evgeny V. Stepanenko	Engineer-technologist
FSBIS «Institute of Problems of Chemical Physics» of RAS; e-mail: office@icp.ac.ru
Elizaveta В. Dvoretskaya	Post-Graduate Student
Oksana V. Koplak	Head of Laboratory, Doctor of Sciences (Phys. & Math.)
FSAEI HE ITMO University; e-mail: od@itmo.ru
Yuriy P. Zarichnyak	Professor, Doctor of Sciences (Phys. & Math.)

DOI:

UDC: 669.018.292

V.I. Gromov¹, N.A. Yakusheva¹, A.V. Vostrikov¹, N.N. Cherkashneva²

HIGH STRENGTH STRUCTURAL STEELS FOR GAS-TURBINE ENGINE SHAFTS (review)

The motor shaft of a gas turbine engine, being a highly loaded part of a particularly critical purpose, has increased requirements for maintaining the level of properties during long-term operation, ensuring the structural strength of the product. An increase in the resource and durability of the product is achieved due to the development of new materials that surpass the used domestic and foreign analogues in their mechanical characteristics. FSUE «VIAM» has deve-loped high-strength structural steels with enhanced characteristics of strength, toughness, durability and heat resistance.

Keywords: high strength steel, shaft, fatigue, engine, mechanical properties, tensile strength.

Reference List

1. Kablov E.N. VIAM: new generation materials for PD-14. Krylya Rodiny, 2019, no. 7-8, pp. 54–58.
2. 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.
3. Kablov E.N., Bakradze M.M., Gromov V.I., Voznesenskaya N.M., Yakusheva N.A. New high strength structural and corrosion-resistant steels for aerospace equipment developed by FSUE «VIAM» (review). Aviacionnye materialy i tehnologii, 2020, no. 1 (58), pp. 3–11. DOI: 10.18577 / 2071-9140-2020-0-1-3-11.
4. Gromov V.I., Kurpyakova N.A., Korobova E.N., Sedov O.V. New heat resistant steel for aircraft bearings. Trudy VIAM, 2019, no. 2 (74), paper no. 02. Available at: http://www.viam-works.ru (accessed: October 26, 2020). DOI: 10.18577/2307-6046-2019-0-2-17-23.
5. Bratukhin A.G., Demchenko O.F., Dolzhenkov N.N., Krivonogov GS. High-strength corrosion-resistant steels of modern aviation. Moscow: Publ. house MAI, 2006, 401 p.
6. Gromov V.I., Yakusheva N.A., Polunov I.L. Evaluation of the effect of heat treatment on mechanical properties of maraging steels in the alloying system Fe–Ni–Mo–Ti–Al. Trudy VIAM, 2017, no. 11 (59), paper no. 02. Available at: http://www.viam-works.ru (accessed: October 20, 2020). DOI: 10.18577/2307-6046-2017-0-11-2-2.
7. Shcherbakov A.I., Krylov S.A., Kalicev V.A., Ignatov V.A. Development of a technology for melting of high-strength maraging steel VKS-180-ID micro-alloyed with REMs. Trudy VIAM, 2015, no. 2, paper no. 04. Available at: http://www.viam-works.ru (accessed: November 4, 2020). DOI: 10.18577/2307-6046-2015-0-2-4-4.
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10. Novothy P., Maurer G. Ultra-High-Strehgth Steels VS Titanium Alloys. Advanced Materials & Processes, 2007, vol. 165, no. 11, pp. 37–40.
11. High strength, high fracture toughness structural alloy: pat. US5087415; filed 06.02.90; publ. 11.02.92.
12. Development of the method of static bend angle determining of friction welded samples made from steel VKS-180-ID. Trudy VIAM, 2013, no. 6, paper no. 05. Available at: http://www.viam-works.ru (accessed: October 20, 2020).
13. High-strength maraging steel and the product which has been executed of it: pat. 2334017 Rus. Federation; filed 05.12.06; publ. 20.09.08.
14. Petrakov A.F., Shalkevich A.B. High-strength steels in aircraft engineering. Aviation materials. Selected works of «VIAM» 1932–2002. Moscow: VIAM, 2002, pp. 180–190.
15. Hardened martensitic steel, a method of obtaining a part from this steel and the part obtained in this way: pat. RU2400557C2; filed 20.04.06; publ. 27.09.10.
16. High strength, high fatigue structural steel: pat. US5393488A USA; filed 06.08.93; publ. 28.08.95.

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DOI:

UDC: 621.785.52

D.N. Romanenko¹, G.S. Sevalnev¹, A.A. Leonov¹, K.A. Udod², E.V. Stepanenko³

IMPROVING THE TRIBOLOGICAL CHARACTERISTICS OF 18KHGT STEEL AFTER CEMENTATION AND HARDENING HEAT TREATMENT

The work presents the results of the following researches:
– samples of gears made of 18KhGT steel (determination of the thickness of the cemented layer, distribution of microhardness over the thickness of the cemented layer, measurement of the surface and core hardness, analysis of the microstructure of the cemented layer and core);
– suspensions of grades VAP-2, VAP-4 and VFP-5 (determination of the conditional viscosity, mass fraction of nonvolatile substances, coating impact strength, coating elasticity in ben-ding, coating adhesion, hardness and density).
There has been performed a comparative analysis of the tribological characteristics of solid lubricating coatings of the VAP-2, VAP-4 and VFP-5 grades on samples of steel 18KhGT after carburizing and hardening heat treatment.

Keywords: steel, gears, carburizing, hardness, microhardness, structure, diffusion layer, wear resistance, solid lubricant coating.

Reference List

1. Kablov E.N. New generation materials – the basis of innovation, technological leadership and national security of Russia. Intellekt i tekhnologii, 2016, no. 2 (14), pp. 16–21.
2. Kablov E.N., Bakradze M.M., Gromov V.I., Voznesenskaya N.M., Yakusheva N.A. New high strength structural and corrosion-resistant steels for aerospace equipment developed by FSUE «VIAM» (review). Aviacionnye materialy i tehnologii, 2020, no. 1 (58), pp. 3–11. DOI: 10.18577 / 2071-9140-2020-0-1-3-11.
3. Kablov E.N. New generation materials and digital technologies for their processing. Vestnik Rossiyskoy akademii nauk, 2020, vol. 90, no. 4, pp. 331–334.
4. Smirnov A.E., Shevchenko S.Y., Shchipunov V.S., Kunyaev V.E., Sevalnev G.S. Special Features of the Carbonitriding of Parts of Instrument Bearings Designed for Extreme Service Conditions. Metal Science and Heat Treatment, 2016, vol. 58, no. 5-6, pp. 287–292.
5. Smirnov A.E., Semenov M. Yu., Mokhova A.S., Sevalnev G.S. Use of combined methods of successive carburizing and nitriding of martensitic steels in low-pressure atmospheres. Metal Science and Heat Treatment, 2020, vol. 62, no. 1-2, pp. 127–132.
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12. Gorlov D.S., Skripak V.I., Muboyadzhyan S.A., Egorova L.P. The research of fretting-wear slip and ion-plasma coatings. Trudy VIAM, 2017, no. 3, paper no. 07. Available at: http://www.viam-works.ru (accessed: September 09, 2020). DOI: 10.18577/2307-6046-2017-0-3-7-7.
13. Bolsunovskaya T.A., Efimochkin I.Yu., Sevostyanov N.V., Burkovskaya N.P. The graphite grades lubrication effect on tribotechnical properties of the metallic composite material. Trudy VIAM, 2018, no. 7 (67), paper no. 08. Available at: http://www.viam-works.ru (accessed: September 24, 2020). DOI: 10.18577/2307-6046-2018-0-7-69-77.
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DOI:

UDC: 678.8

A.I. Tkachuk¹, K.I. Donetsky¹, I.V. Terekhov¹, R.Yu. Karavaev¹

THE USE OF THERMOSETTING MATRICES FOR THE MANUFACTURE OF POLYMER COMPOSITE MATERIALS BY THE NON-AUTOCLAVE MOLDING METHODS

In work, the rheological heat-resistant and elastic-strength characteristics of thermosetting systems developed at FSUE «VIAM» (epoxy matrices of grades VSE-20, VSE-30, VSE-33, bismaleimide grade VST-57 and cyan ester matrices of grades VST-1210 and VST-60) processed by non-autoclave technologies. These resins make it possible to obtain composite materials for structural purposes with an operating temperature from -60 to 250 °C by the methods of vacuum infusion, impregnation under pressure and film technology. The work also presents glass transition temperatures and mechanical properties of carbon and fiberglass plastics obtained on their basis.

Keywords: autoclave-free molding; epoxy, bismaleimide, cyanoester matrices; vacuum infusion; film technology; polymer composite materials.

Reference List

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2. Kablov E.N. New generation materials - the basis of innovation, technological leadership and national security of Russia. Intellekt i tekhnologii, 2016, no. 2, pp. 16-22.
3. Kablov E.N., Chursova L.V., Babin A.N., Mukhametov R.R., Panina N.N. Developments of FSUE «VIAM» in the field of melt binders for polymer composite materials. Polimernye materialy i tekhnologii, 2016.Vol. 2.No.2, pp. 37–42.
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7. Postnova M.V., Postnov V.I. Development experience out-of-autoclave methods of formation PCM Trudy VIAM, 2014, no. 4, paper no. 06. Available at: http://www.viam-works.ru (accessed: August 15, 2020). DOI 10.18577/2307-6046-2014-0-4-6-6.
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15. Grigorev M.M., Hrulkov A.V., Gurevich Ya.M., Panina N.N. Manufacture of fiberglass skins using vacuum infusion using epoxyanhydride resin and a semipermeable membrane. Trudy VIAM, 2014, no. 2, paper no. 04. Available at: http://viam-works.ru (accessed: August 15, 2020). DOI: 10.18577/2307-6046-2014-0-2-4-4.
16. Zharinov M.A., Shimkin A.A., Akhmadiyeva K.R., Zelenina I.V. Features and properties of solvent-free PMR-type polyimide resin. Trudy VIAM, 2018, no. 12 (72), paper no. 05. Available at: http://www.viam-works.ru (accessed: August 14, 2020). DOI: 10.18577/2307-6046-2018-0-12-46-53.
17. Mukhametov R.R., Akhmadiyeva K.R., Soloveva N.A., Gulyayev A.I. Increase in water resistance of bismaleimide binder. Trudy VIAM, 2017, no. 5 (53), paper no. 08. Available at: http://www.viam-works.ru (accessed: January 14, 2020). DOI: 10.18577/2307-6046-2017-0-5-8-8.
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19. Doneckij K.I., Karavaev R.Yu., Raskutin A.E., Panina N.N. Properties of carbon fiber and fiberglass on the basis of braiding preforms. Aviacionnye materialy i tehnologii, 2016, No. 4 (45), pp. 54–59. DOI: 10.18577/2071-9140-2016-0-4-54-59.
20. Timoshkov P.N., Platonov A.A., Hrulkov A.V. Film resin infusion as an advanced method for out-of-autoclave processing of polymer composites. Trudy VIAM, 2015, no. 5, paper no. 09. Available at: http://www.viam-works.ru (accessed: August 15, 2020). DOI: 10.18577/2307-6046-2015-0-5-9-9.
21. Grigorev M.M., Kogan D.I., Tverdaya O.N., Panina N.N. Features of manufacturing of PCM RFI method. Trudy VIAM. Trudy VIAM, 2013, no. 4, paper no. 03. Available at: http://www.viam-works.ru (accessed: August 15, 2020).
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23. Donetskiy K.I., Karavayev R.YU., Raskutin A.Ye., Dun V.A. Carbon fibers composite material on the basis of volume reinforcing triax braiding preformes. Trudy VIAM, 2019, no. 1 (73), paper no. 07. Available at: http://viam-works.ru (accessed: August 14, 2020). DOI: 10.18577/2307-6046-2019-0-1-55-63.
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29. Prokhorova E.V., Mukhametov R.R. Modification of triazine-containing formulations. Trudy VIAM, 2013, no. 9, paper no. 06. Available at: http://www.viam-works.ru (accessed: November 27, 2019).

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DOI:

UDC: 677.014

V.G. Babachov¹, E.V. Stepanova¹, A.M. Zimichev¹, O.V. Basargin¹

OXIDE CONTINUOUS FIBERS AS A PART OF FLEXIBLE HIGH TEMPERATURE INSULATION

This work is devoted to the production of flexible continuous ceramic fibers based on refractory aluminum and silicon oxides using the Sol-gel method. The processes of transition of water-soluble components of the precursor solution to the oxide form during primary firing of gelified fibers are studied. Structural and phase transformations in fibers under high-temperature heating are examined. The sequence of phase transitions from the amorphous state to the crystal stable phase of α-Al2O3 is shown. The dependence of the mechanical properties of oxide fiber samples on the firing temperature is studied. The conditions for obtaining flexible fibers for textile processing into thrown-twisted heat-resistant yarns are determined. A batch of yarns has been made with additional introduction of organic yarns to protect oxide fibers. The article shows the possibility of manufacturing flexible high-temperature insulation from oxide fibers in the form of a braid for sealing cords and current conductors.

Keywords: continuous fibers, alumina, heat insulation, linear density, tensile strength, heat resistance.

Reference List

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2. Armor for «Buran». Materials and technologies of VIAM for the ISS «Energiya–Buran» i tekhnologii. Ed. E.N. Kablov. Moscow: Science and Life, 2013, 128 p.
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19. Buchilin N.V., Lyulyukina G.Yu., Varrik N.M. Influence of the mode of roasting on structure and property of high-porous ceramic mullite materials. Trudy VIAM, 2017, no. 5 (53), paper no. 04. Available at: http://www.viam-works.ru (accessed: August 11, 2020). DOI: 10.18577/2307-6046-2017-0-5-4-4.
20. Evteev A.A. Some aspects of development of optimal firing conditions for ceramic compositions containing eutectic additives. Trudy VIAM, 2016, no. 2 (38), paper no. 12. Available at: http://www.viam-works.ru (accessed: September 1, 2020). DOI: 10.18577/2307-6046-2016-0-2-12-12.
21. Zimichev A.M., Varrik N.M., Sumin A.V. Threads of refractory oxides for sealing thermal insulation. Trudy VIAM, 2015, no. 6, paper no. 05. Available at: http://www.viam-works.ru (accessed: August 18, 2020). DOI: 10.18577/2307-6046-2015-0-6-5-5.

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UDC: 621.318.2

D.V. Korolev¹, V.P. Piskorskii¹, R.A. Valeev¹, M.M. Bakradze¹, E.V. Dvoretskaya², O.V. Koplak², R.B. Morgunov¹

RARE-EARTH RE–TM–B MICROMAGNETS ENGINEERING (review)

The paper gives an analytical review of existing technologies of production and application of micron-sized rare-earth magnets of the RE–TM–B group (microparticles, microwires, films). The specificity of their magnetic properties, which appears at the micron scale, is considered. The analytical comparison of the methods for preparing micromagnets has been carried out. Possible practical applications of micromagnets and their application in various fields of modern technology are systematized. Possible directions of development of micromagnetic technologies are discussed.

Keywords: micromagnets, magnetic anisotropy, rare-earth magnets, thin films, microwires, magnetic hysteresis.

Reference List

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UDC: 629.7.023.224

O.N. Doronin¹, D.S. Gorlov¹, E.N. Azarovsky¹, A.S. Kochetkov¹

STUDY OF THE STRUCTURE AND PROPERTIES OF A HEAT-RESISTANT COATING AT HIGH-TEMPERATURE DEFORMATION OF SAMPLES FROM TITANIUM INTERMETALLIC ALLOY

In order to set up research works and determine the requirements for the promising options of protective coatings he paper studies an experimental version of a complex multilayer heat-resistant ion-plasma coating at high-temperature deformation of samples from an intermetallic titanium alloy. The article shows that at high values of residual deformation (up to 11%) of a base made of an intermetallic titanium alloy the multilayer coating is capable of providing sufficiently high level of protective properties.

Keywords: intermetallic titanium alloy, high-temperature deformation, barrier layer, condensation-diffusion coating, high-energy vacuum plasma technology, antioxidant coating.

Reference List

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2. Kablov E.N., Nochovnaya N.A., Shiryaev A.A., Davydova E.A. Investigation of structural and phase transformations in metastable β-titanium alloys and effect of cooling rate from homogenization temperature on structure and properties of VT47 alloy. Part 2. Trudy VIAM, 2020, no. 8 (90), paper no. 02. Available at: http://www.viam-works.ru (accessed: November 2, 2020). 10.18577/2307-6046-2020-0-8-11-19.
3. Nochovnaya N.A., Bazyleva O.A., Kablov D.E., Panin P.V. Intermetallic alloys based on titanium and nickel. Ed. E.N. Kablov. Moscow: VIAM, 2018, 308 p.
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6. Lecarrié G., Collain C. Snecma (Safran) and Mecachrome sign contract for production of titanium aluminide blades on the LEAP engine. Available at: http://www.safran-group.com/media/20140414_snecma-safran-and-mecachrome-... (accessed: October 29, 2020).
7. Kosmin A.A., Budinovskiy S.A., Muboyadzhyan S.A. Heat and corrosion resistant coating for working turbine blades from promising high-temperature alloy VZhL21. Aviacionnye materialy i tehnologii, 2017, no. 1 (46), pp. 17–24. DOI: 10.18577/2071-9140-2017-0-1-17-24.
8. Azarovsky E.N., Muboyadzhyan S.A. Investigation of the process of modification of steels EP866 and EI961 in titanium plasma VDR with tests on resistance to salt corrosion. Trudy VIAM, 2018, no. 2, paper no. 11. Available at: http://www.viam-works.ru (accessed: November 02, 2020). DOI: 10.18577/2307-6046-2018-0-2-11-11.
9. Cast blades of gas turbine engines: alloys, technologies, coatings. Ed. E.N. Kablov. 2nd ed. Moscow: Nauka, 2006, 632 p.
10. Kashapov O.S., Novak A.V., Nochovnaya N.A., Pavlova T.V. Condition, problems and perspectives of creation of heat resisting titanium alloys for GTE details. Trudy VIAM, 2013, no. 3, paper no. 02. Available at: http://www.viam-works.ru (accessed: November 2, 2020).
11. Barrier coatings for oxidation protection incorporating compatibility layer: pat. US5049418; filed 19.02.91; publ. 17.09.91.
12. Nochovnaya N.A., Panin P.V., Alekseev E.B., Novak A.V. Regularities of the formation of the structural-phase state of alloys based on ortho- and gamma-aluminides of titanium in the process of thermomechanical treatment. Vestnik RFFI, 2015, no. 1, pp. 18–24.
13. High-temperature wear-resistant member and its manufacturing method: pat. JP2009041059; filed 08.08.07; publ. 14.11.12.
14. Method for producing abrasive tips for gas turbine blades: pat. US6194086; filed 16.04.99; publ. 27.02.01.
15. Abrasive ceramic matrix turbine blade tip and method for forming: pat. US5952110; filed 24.12.96; publ. 14.09.99.
16. Alekseev Е.B., Nochovnaya N.A., Novak A.V., Panin P.V. Wrought intermetallic titanium ortho alloy doped with yttrium Part 1. Research on ingot microstructure and rheological curves plotting. Trudy VIAM, 2018, no. 6 (66), paper no. 02. Available at: http://www.viam-works.ru (accessed: November 2, 2020). DOI: 10.18577/2307-6046-2018-0-6-12-21.
17. Titanium matrix composites: pat. US5624505; filed 14.10.94; publ. 29.04.97.
18. Turbine blade tip with optimized abrasive: pat. US2005/0129511; filed 11.12.03; publ. 16.06.05.
19. Oxidation-resistant Ti–Al–Fe alloy diffusion barrier coatings: pat. US5776617; filed 21.10.96; publ. 07.07.98.
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21. Oxidation protection method for titanium: pat. US5776266; filed 05.06.95; publ. 07.07.98.
22. Aluminum/aluminum oxide/Ni-base superalloy composite coating for titanium-aluminum alloy and preparation method thereof: pat. CN101310969; filed 23.05.07; publ. 26.11.08.
23. Aluminum/aluminum oxide diffusion blocking layer for titanium-aluminum alloy: pat. CN101310970; filed 23.05.07; publ. 26.11.08.
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25. Ti–Cr–Al protective coatings for alloys: pat. US5783315; filed 10.03.97; publ. 21.07.98.
26. Method of hardening the surface of metal products: pat. RU2340704; filed 01.02.07; publ. 10.12.08.
27. Kablov E.N., Kashapov O.S., Medvedev P.N., Pavlova T.V. Study of a α+β-titanium alloy based on a system of Ti–Al–Sn–Zr–Si–β-stabilizing alloying elements. Aviacionnye materialy i tehnologii, 2020, no. 1 (58), pp. 30–37. DOI: 10.18577/2071-9140-2020-0-1-30-37.
28. Method of processing the working surface of parts: pat. RU2308537; filed 14.03.06; publ. 20.10.07.
29. Aleksandrov D.A., Muboyadzhyan S.A., Zhuravleva P.L., Gorlov D.S. Investigation of the effect of surface preparation and ion-assisted deposition on the structure and properties of erosion-resistant ion-plasma coating. Trudy VIAM, 2018, no. 10 (70), paper no. 08. Available at: http://www.viam-works.ru (accessed: November 02, 2020). DOI: 10.18577/2307-6046-2018-0-10-62-73.
30. Coating systems for titanium oxidation protection: pat. US5077140; filed 17.04.90; publ. 31.12.91.
31. Modified MCrAlY coatings on turbine blade tips with improved durability: pat. US2007264523; filed 02.03.04; publ. 15.11.07.

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UDC: 629.7.023.222

V.A. Kuznetsova¹, S.A. Marchenko¹, V.V. Emelyanov¹, V.G. Zheleznyak¹

STUDY OF THE INFLUENCE OF MOLECULAR MASS OF EPOXY OLIGOMERS AND HARDENERS ON THE OPERATIONAL PROPERTIES OF PAINT COATINGS

The paper provides the results of studies of lacquer coatings made on the basis of epoxy oligomers of different molecular mass hardened by the amine type hardeners. Thermal resistance, erosion resistance, strength and deformation characteristics of free lacquer films, as well as their physical and mechanical properties have been examined. It has been determined that the properties of epoxy lacquer coatings are significantly influenced by the molecular mass of the oligomer and hardener used to produce these coatings. It is shown that with the increase in the molecular mass used to obtain coatings epoxy oligomers improve their operational properties, such as heat resistance, erosion resistance, physical and mechanical properties.

Keywords: epoxy oligomers, hardeners, erosion resistance, heat resistance, adhesion, strength at rupture, relative elongation, strength on impact.

Reference List

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11. Semenova L.V., Nefedov N.I., Belova M.V., Laptev A.B. Systems of paint coatings for helicopter equipment. Aviacionnye materialy i tehnologii, 2017, no. 4 (49), pp. 56–61. DOI: 10.18577/2071-9140-2017-0-4-56-61.
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UDC: 620.178.35

V.S. Erasov¹, E.I. Oreshko¹

TESTS FOR FATIGUE OF METAL MATERIALS (review) Part 2. Analysis of the Basquin–Manson–Coffin equation. Methods of testing and processing of results

A review of test methods is carried out and results of fatigue tests of metal materials are presented. The analysis of the Basquin–Manson–Coffin equation is presented. Deformation fatigue curves for several brands of metal materials are constructed. The method of program loading (Rε=-1) with step-by-step increase of sample deformation and creation of a surface in 3D-space with coordinates «lgN–σ–ε» and the generalized chart of cyclic deformation is proposed.

Keywords: fatigue tests, endurance, fatigue crack, deformation, Basquin–Manson–Coffin equation, program loading, chart of cyclic deformation.

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Полнотекстовая версия

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DOI:

UDC: 620.165.79

E.I. Oreshko¹, V.S. Erasov¹, N.O. Yakovlev¹, D.A. Utkin¹

METHODS FOR DETERMINING THE MECHANICAL CHARACTERISTICS OF MATERIALS USING INDENTATION (review)

The paper considers the main methods for determining the hardness of materials. The basic formulas for calculating the mechanical characteristics of materials by hardness values are presented. The analysis of methods for calculating tensile diagrams of materials by indentation diagrams is carried out. Approaches to building a finite element model of material indentation are considered. The paper shows the need to improve existing standards and develop computational methods with a detailed description of techniques for recalculating indentation diagrams into mechanical characteristics of materials.

Keywords: hardness, mechanical properties, indentation, stresses, deformation, calculation, stress-strain diagram.

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Aviation materials and technologies

Scientific-technical journal ISSN 2713-0193

ARCHIVE

Aviation materials and technologies №1, 2021

Contents

Heat-resistant alloys and steels

Composite materials

Protective and functional coatings

Material tests

Authors

HIGH STRENGTH STRUCTURAL STEELS FOR GAS-TURBINE ENGINE SHAFTS (review)

IMPROVING THE TRIBOLOGICAL CHARACTERISTICS OF 18KHGT STEEL AFTER CEMENTATION AND HARDENING HEAT TREATMENT

THE USE OF THERMOSETTING MATRICES FOR THE MANUFACTURE OF POLYMER COMPOSITE MATERIALS BY THE NON-AUTOCLAVE MOLDING METHODS

OXIDE CONTINUOUS FIBERS AS A PART OF FLEXIBLE HIGH TEMPERATURE INSULATION

RARE-EARTH RE–TM–B MICROMAGNETS ENGINEERING (review)

STUDY OF THE STRUCTURE AND PROPERTIES OF A HEAT-RESISTANT COATING AT HIGH-TEMPERATURE DEFORMATION OF SAMPLES FROM TITANIUM INTERMETALLIC ALLOY

STUDY OF THE INFLUENCE OF MOLECULAR MASS OF EPOXY OLIGOMERS AND HARDENERS ON THE OPERATIONAL PROPERTIES OF PAINT COATINGS

TESTS FOR FATIGUE OF METAL MATERIALS (review) Part 2. Analysis of the Basquin–Manson–Coffin equation. Methods of testing and processing of results

REVISITING THE CONFIRMATION OF THE IDENTITY OF THE CORROSION DESTRUCTION MECHANISM OF ALUMINUM ALLOYS (review) Part 2. Corrosion in sea water

METHODS FOR DETERMINING THE MECHANICAL CHARACTERISTICS OF MATERIALS USING INDENTATION (review)

MEASUREMENT OF THERMOPHYSICAL PROPERTIES OF FLEXIBLE THERMAL INSULATION