Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-3-11
УДК 621.791
Ospennikova O.G., Naprienko S.A., Medvedev P.N., Zaysev D.V., Rogalev A.M.
FEATURES OF THE FORMATION OF THE STRUCTURAL-PHASE STATE OF THE EP648 ALLOY DURING SELECTIVE LASE MANUFACTURE

The paper shows the features of the formation of the structural-phase and textural state of the EP648 alloy obtained by the SLM method in the initial state, after hot isostatic pressing and heat treatment. It was found that in the process of synthesis, a limited crystallographic texture of the γ-phase is formed, which does not undergo significant changes in the process of subsequent treatments. The uniform distribution of fine particles of the hardening phases, apparently, leads to an increase in both the strength and plastic properties of the material obtained by the SLM method in comparison with the material obtained by the traditional technology.

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2.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-12-20
УДК 669.018.95
Shestakov A.V., Karashaev M.M., Dmitriev N.S.
TECHNOLOGICAL WAYS TO CREATE COMPOSITE MATERIALS BASED ON HEAT-RESISTANT REFRACTORY COMPOUNDS (review)

The article discusses the main technological approaches to obtain heat-resistant and heat-resistant materials based on compounds in the Ni–Al system in order to use them in promising products of aviation and rocket technology. It is shown that when receiving materials based on compounds in the Ni-Al system, a phase of eutectic origin is formed based on the Ni3Al compound, which reduces the technological plasticity of the alloys of this system. The use of powder metallurgy methods eliminates such phases in the structure of alloys obtained using granule metallurgy technology, as well as with the use of special methods of powder metallurgy.

Technological approaches are presented to obtain similar materials using powder metallurgy methods combined with thermomechanical processing.

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3.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-21-33
УДК 678.84
Shestakov A.M.
CERAMICS BASED ON ORGANOSILICON POLYMERS-PRECURSORS: MICROSTRUCTURE AND PROPERTIES (review). Part 1

The paper considers the process of pyrolysis of polymers-precursors, and also shows the influence of various parameters of technological processes for obtaining ceramics on its composition, structure, and properties. The main types of binary, ternary and multicomponent silicon-based ceramics, methods of its preparation, features of structure and properties are considered, and promising directions of application of ceramics are determined. The possibility of obtaining porous ceramic materials (ceramic foams) with controlled porosity and ceramic composite materials with a given composition is noted.

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4.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-34-42
УДК 629.7.023.224
Aleksandrov D.A., Budinovskiy S.A., Gorlov D.S.
DEVELOPMENT OF FUNCTIONAL ION-PLASMA COATINGS BASED ON MULTILAYER HETEROGENEOUS STRUCTURES OF METAL NITRIDES

The article deals with the development of ion-plasma coating systems based on multilayer heterogeneous structures of the type (Me1)N/(Me2)N, (Me1–Me2)N/(Me3)N, (Me1–Me2–Me3)N/(Me4)N, where Me: Ti, Al, Cr, Mo. Tests for heat resistance and wear resistance, gas-abrasive resistance, metallographic and x-ray structural studies were carried out. It is shown that the ion-plasma coating (Ti–Al–Cr)N/CrN can be used to increase the heat resistance, wear resistance (including abrasive) of steel and titanium intermetallic parts of aircraft gas turbine engines operating in the temperature range up to 800 °C.

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5.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-43-49
УДК 629.7.023.224
Zakalashnyy A.V., Denisova V.S., Vlasova O.V., Solntsev St.S.
TECHNOLOGICAL ASPECTS OF OBTAINING FRIT OF HEAT-RESISTANT ENAMEL FOR THE PROTECTION OF CORROSION-RESISTANT STEELS

The technological aspects of producing frit based are studied for heat-resistant enamel EV-300-60M in experimental industrial conditions. It was found that in the temperature range of 1200–1250 °C, intensive foaming of the charge occurs due to the active release of oxygen by manganese oxide. Due to the combination of technological operations, it is possible to ensure a sufficient reduction, but not complete exclusion of foaming when cooking frit. In this regard, the further direction of work on improving heat-resistant enamels for the protection of corrosion-resistant steels determines the need to develop a technological composition of frit.

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6.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-50-58
УДК 678.026
Kuznetsova V.A., Zheleznyak V.G., Lonskii S.L., Kovrizhkina N.A., Silaeva A.A.
INFLUENCE OF STRUCTURE OF POLYMERIC MATRIX ON STRUCTURE AND PROPERTY PRIMING COVERINGS

Adhesion, physicomechanical properties, and also kinetics of water absorption of priming coatings on basis the E-41 epoxy resin modified by liquid Thiokol 1 and by Laproxide AF, and also their phase structure are investigated. As hardeners of primer compositions organic silicon ammine ASOT-2 and low-molecular polyamide PO-200 has been used. It is shown that use of the reactive modifier Laproxide AF and hardener ASOT-2 in the epoxy and thiokol film-formers allows to receive priming coating with uniform finely divided phase structure with low porosity and high water resistance.

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7.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-59-66
УДК 629.7.023.222
Merkulova Yu.I., Serdcelyubova A.S., Zheleznyak V.G.
LACQUER COATING SYSTEM BASED ON COLD DRY POLYURETHANE ENAMEL FOR PROTECTING NOSE SPINNERS OF PLANES

Recently in the aviation industry there has been an increasing demand for the development of functional paints and varnishes, in particular, for the production of coatings intended to protect aviation equipment from abrasion and erosion damaged. Coatings of this type are especially relevant for polymer products. This work is devoted to the development of a new polyurethane enamel for the protection of antenna radomes. The comparative data of fluoroplastic, polyurethane imported enamel, enamels based on chlorosulfonated polyethylene and fluorinated rubber, intended for protection of abrasive damage.

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8.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-67-74
УДК 620.193.2
Kashin D.S., Ivanov I.M., Doronin O.N.
RESEARCH OF EROSION RESISTANCE OF SOLDERED JOINTS WITH PROTECTIVE COATINGS

Presents results of studies of the erosion resistance of soldered joints with various types of coatings. It was established that a coating based on tungsten carbide, applied by the electrospark method, has the greatest positive influence on the erosion resistance of VPr4 solder. At the same time, preliminary machining of the solder surface also increases resistance to the effects of erosion flow. The possibility of using an electrospark coating as an erosion-resistant sublayer for composite protective coatings was shown.

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9.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-75-83
УДК 539.26
Kuzmina N.A., Lifshitz V.A., Potrakhov E.N., Potrakhov N.N.
SPECIFICITY OF APPLICATION OF X-RAY METHODS OF «SWING» AND LAUE IN DETERMINING THE QUALITY OF THE STRUCTURE OF CASTINGS OF NICKEL HEAT-RESISTANT ALLOYS

Systematically analyzes and justifies the characteristics of equipment operating in monochromatic radiation by the «swing» method and in polychromatic radiation by the Laue method in relation to the specifics of controlled samples in the technology of single-crystal casting from nickel heat-resistant alloys. The main application of the «swing» method is the mass control of seed blanks, seedings, growth cones of samples and blades. The main application of the Laue method is local measurements of block misorientation in the casting of the turbine blade, determination of the crystallographic orientation misorientation in controlled areas on the blade. An optimized configuration is proposed for a compact modification of a diffractometer operating in monochromatic radiation for mass control of the structure in production.

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10.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-84-91
УДК 543.42
Karachevtsev F.N., Letov A.F., Slavin A.V.
UNCERTAINTY OF THE MEASUREMENTS RESULTS OF THE CHEMICAL COMPOSITION AND ITS METHODS ASSESSMENT

An explanation of the difference between the uncertainty and the error of the measurement results, which is in the approach to their assessment, is given. The standard and expanded uncertainty are estimated taking into account the uncertainty at each operation to transfer the size of a physical quantity from a standard (standard sample) to a measuring instrument and during measurements. The error is estimated based on the variance of the final measurement. Methods for evaluating the uncertainty of measurement results are given depending on regulatory documents, metrological characteristics, measurement methods, such as indicators and limits of repeatability and reproducibility.

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11.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-92-103
УДК 620.179.16
Boychuk A.S., Dikov I.A., Generalov A.S., Slavin A.V.
FRP STRUCTURES RADIUS ZONES ULTRASONIC TESTING (review)

The review of FRP structures radius zones ultrasonic non-destructive testing techniques is given in the paper. It is shown that both single-element piezoelectric transducers and phased arrays can currently be used to solve this problem. It is necessary to use special tools for positioning and creating an acoustic contact with both types of transducers. Ultrasonic testing using the described tools allows detecting defects in radius zones up to 6 mm in size.

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12.
dx.doi.org/ 10.18577/2307-6046-2021-0-8-104-112
УДК 539.24:620.1
Startsev V.O., Nikolaev E.V., Vardanyan A.M., Nechaev A.A.
THE INFLUENCE OF CLIMATIC FACTORS ON RESIDUAL STRESSES IN NANOMODIFIED CYANATE ESTER-BASED CFRP

The residual stresses in carbon fiber reinforced plastic (CFRP), based on VTkU-2.200 carbon fiber and VSC-14 cyanate ester resin, modified by nanoscale additives (astralen) were studied. Natural exposure was performed in a moderately cold climate. The influence of nanoadditives on mechanical and physical CFRP’s properties after 9 months of climatic testing was studied using the following properties: three-point bending strength, compression strength, coefficient of linear thermal expansion, glass transition temperature and residual stresses parameters. The increase of residual stresses after climatic testing was revealed.

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13.
AUTHORS INFORMATION

Authors named

Position, academic degree

FSUE «All-Russian scientific research institute of aviation materials» SSC of RF;

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Denis А. Aleksandrov

Leading Engineer

Alexander S. Boychuk

Senior Researcher, Candidate of Sciences (Tech.)

Sergey A. Budinovsky 

Acting Head of Sector, Doctor of Sciences (Tech.)

Arutyun M. Vardanyan 

Second Category Technician

Olga V. Vlasova

Engineer

Alexander S. Generalov

Head of Laboratory, Candidate of Sciences (Tech.)

Dmitry S. Gorlov 

Leading Engineer

Valentina S. Denisova 

Head оf Sector, Candidate of Sciences (Tech.)

Ivan A. Dikov 

Leading Engineer

Nikita S. Dmitriev 

Engineer

Oltg N. Doronin 

Deputy Head of Laboratory

Vyacheslav G. Zheleznyak

Head of Laboratory, Candidate of Sciences (Tech.)

Denis V. Zaitsev

Leading Engineer

Alexander V. Zakalshnyy

Engineer

Ivan M. Ivanov

Technician

Fedor N. Karachevtsev

Head of Laboratory, Candidate of Sciences (Chem.)

Mukhamed M. Karashaev 

Leading Engineer, Candidate of Sciences (Tech.)

Dmitry S. Kashin

Head of Sector

Natalia A. Kovrizhkina

Engineer

Vera A. Kuznetsova

Head of Sector, Candidate of Sciences (Tech.)

Natalya A. Kuzmina 

Senior Researcher, Candidate of Sciences (Geol. & Mineral.)

Alexander F. Letov 

Deputy Head of Laboratory, Candidate of Sciences (Chem.)

Stanislav L. Lonskii 

Second Category Engineer

Pavel N. Medvedev

Head of Sector, Candidate of Sciences (Phys. & Math.)

Yulia I. Merkulova 

Deputy Head of Laboratory,  Candidate of Sciences (Tech.)

Sergey A. Naprienko 

Head of Sector, Candidate of Sciences (Tech.)

Alexander A. Nechaev 

Second Category Technician

Evgeny V. Nikolaev

Deputy Head of Testing Center, Candidate of Sciences (Tech.)

Olga G. Ospennikova

Deputy Director General, Doctor of Sciences (Tech.)

Aleksey M. Rogalev

Head of Sector

Alevtina S. Serdcelyubova

Leading Engineer, Candidate of Sciences (Tech.)

Andrey V. Slavin 

Head of Testing Center, Doctor of Sciences (Tech.)

Stanislav S. Solntsev

Counselor to Director General, Doctor of Sciences (Tech.)

Valery O. Startsev  

Head of Laboratory, Doctor of Sciences (Tech.)

Alexander V. Shestakov 

Leading Engineer

Alexey M. Shestakov 

Leading Researcher, Candidate of Sciences (Chem.)

FSAEI HE «Saint Petersburg Electrotechnical University «LETI» named after V.I. Ulyanov (Lenin)»;

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Nikolay N. Potrakhov

Head of a Chair, Doctor of Sciences (Tech.)

JSC «Electronic Technique-Medicine»; е-mail: Этот адрес электронной почты защищен от спам-ботов. У вас должен быть включен JavaScript для просмотра.

Viktor A. Lifshitz

Engineer

Evgeny N. Potrakhov

Director General, Candidate of Sciences (Tech.)

Dmitry Mendeleev University of Chemical Technology of Russia; e-mail: Этот адрес электронной почты защищен от спам-ботов. У вас должен быть включен JavaScript для просмотра.

Anna A. Silaeva 

Assistant, Candidate of Sciences (Tech.)

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