Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2022-0-12- 3-13
УДК 621.791
Khodakova E.A., Sviridov A.V., Skupov A.A., Stelnikovich A.Yu.
CREATION OF PLASMA WELDING JOINTS (review)

Main achievements of recent years in the field of plasma welding, made by scientists from around the world and the history of the development of plasma technologies showed in the article. Main features of technological processes in which the source of heating is plasma are given. It is shown that at present a promising direction in plasma welding development is the combined and hybrid use of two or more heat sources in the formation of a welded joint. The description of equipment for plasma welding is presented.

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2.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-14-26
УДК 678.4
Pravada E.S., Vakhrusheva Ja.A., Gerasimov D.M., Chaykun A.М.
RUBBER-BASED SEALANTS (review)

The review is devoted to rubbers used in the production of sealing materials (sealants). According to literary sources and experimental works, the dependences of the properties of sealing materials on the structure of rubbers are analyzed, general requirements for sealants used in critical products are identified. The assessment of rubbers used in sealing materials for aviation purposes and their main technical characteristics is given. The prospects of using combined polymers (rubbers) in the production of sealants for critical products have been revealed.

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3.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-27-38
УДК 678.8
Donetskiy K.I., Karavaev R.Y., Bystrikova D.V., Gracheva A.D.
СARBON FIBER BASED ON A VOLUME-REINFORCING BRAIDED PREFORM FOR AN ELEMENT OF A PROPELLER BLADE

Currently, one of the global trends in the development of aircraft engines is the replacement of metal alloys with composite materials, which makes it possible to achieve a significant reduction in the weight of products and improve their performance. The use of modern methods of modeling the process of impregnation of carbon filler allows to reduce the development time of both the material itself and the product based on it. It is necessary to apply a multilevel approach when developing materials of a new generation – material modeling at nano-, micro-, meso- and macrolevels, behavior of elementary samples, structural elements and products.

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4.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-39-48
УДК 621.318.2
Korolev D.V., Valeev R.A., Morgunov R.B., Piskorsky V.P.
EFFECT OF HEAT TREATMENT OF SINTERED Pr–Dy–Fe–Co–B MAGNETS ON THEIR COERCIVITY

The coercive force of sintered Pr–Dy–Fe–Co–B magnets plays a decisive role for the quality and accuracy of gyroscopes and other navigation devices. The residual magnetization also plays an important role in determining the sensitivity threshold and the accuracy of the such systems. The chemical design of magnets, i. e. the selection of chemical composition, does not fully realize the best characteristics. Therefore, some success can be achieved by applying heat treatment. The article shows that the selection of the heat treatment mode of sintered magnets allows to improve their characteristics to technically acceptable values, which greatly simplifies the manufacturing technology of such magnets.

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5.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-49-62
УДК 678.8
Ivanov M.S., Sagomonova V.A., Morozova V.S.
DOMESTIC THERMOPLASTIC CARBON PLASTIC BASED ON POLYETHERETHERKETONE

The analysis of information sources in area of thermoplastic composite materials on the basis of polyetheretherketone (PEEK) for aerospace application is carried out. Requirements are formulated and the main results on development of prepreg and thermoplastic carbon plastic the VKU-65 brands on the basis of domestic woven carbon filler and PEEK binding are provided. Processes of manufacturing of prepreg and thermoplastic carbon plastic are described, research of their main properties is conducted. The refining technology of thermoplastic carbon plastic is developed by thermoforming method.

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6.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-63-75
УДК 621.791.724:669.018.95
Khodykin L.G., Nyafkin A.N., Kosolapov D.V., Zhabin A.N.
LASER WELDING OF METAL COMPOSITE MATERIALS BASED ON ALUMINIUM ALLOY REINFORCED WITH REFRACTORY PARTICLES SiC (review)

A scientific and technical literature review in the field of welding of aluminum alloys reinforced with refractory particles of silicon carbide is presented. Structural changes after laser welding, the causes of various kinds of defects and ways to improve the weldability of the material are described. The results of testing the mechanical properties of welded joints are presented.

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7.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-76-86
УДК 678.8
Ponomarenko L.A.
MECHANICAL PROPERTIES OF POLYMER COMPOSITE MATERIALS BASED ON KNITTED FILLERS WITH MODIFIED STRUCTURE (review)

The mechanical properties of polymer composite materials (PCM) based on knitted fillers with a modified structure are considered. The specific features of the structure of fillers and the nature of their influence on the mechanical properties of the filler and PCM are described. Particular attention is paid to knitwear with additional non-knitted carbon fibers and the properties of PCM based on it. For such materials, the tensile strength is in the range from 767 to 1157 MPa, which is comparable to the values of this characteristic of carbon fiber reinforced plastics based on unidirectional fillers.

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8.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-87-95
УДК 669.058
Aleksandrov D.A., Gorlov D.S.
THE RESEARCH OF EROSION RESISTANCE AND RESIDUAL STRESSES IN LAYERED ION-PLASMA COATINGS

Presents the results of studies of various variants of layered erosion-resistant coatings based on titanium and zirconium nitrides, chromium carbide. Metallographic studies, studies of residual stresses, phase composition, tests for erosion resistance, endurance of samples with coatings were carried out. The dependence of erosion resistance, phase composition and stress-strain state of coatings on the energy parameters of the application process has been established. The influence of functional sublayers on the stress-strain state of the layered ion-plasma coating and its erosion resistance has been established.

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9.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-96-106
УДК 669.058
Kozlov I.A., Fomina M.A., Dyomin S.A., Benarieb I., Khmeleva K.M.
USE OF METAL POWDER COMPOSITIONS TO REMOVE DEFECTS OF PARTS FROM VAS-1 ALLOY BY COLD GAS-DYNAMIC SPRAYING METHOD

During the operation of aircraft parts, internal stresses may occur, leading to the appearance of cracks, as well as the formation of defects due to impact loads, which can lead to the destruction of the part and structure. The method of cold gas-dynamic spraying (CGS) of metals makes it possible not only to apply various protective and functional coatings, but also, when using plastic materials, to effectively eliminate defects in parts and assemblies for various purposes.

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10.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-107-120
УДК 620.179
Chertishchev V.Yu., Boychuk A.S., Dikov I.A., Gorbovets M.A.
ESTIMATION OF DEFECT DEPTH IN MULTILAYER PCM HONEYCOMB DURING IMPEDANCE TESTING WITH SERIAL DETECTORS

Presents studies aimed at creating a methodology for assessing the depth of defects in multilayer honeycomb parts made of polymer composite materials during impedance testing with serial flaw detectors with the construction of C-scans. There are methods for estimating depth based on data with two independent parameters, which require special equipment and software. The study is aimed at creating a technique based on the analysis of only one parameter due to the knowledge of the mechanisms of the influence of the depth of defects on the impedance value and understanding the nature of the change in the signal of the flaw detector when the load changes.

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11.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-121-134
УДК 579.26:678.8
Laptev A.B., Zheleznyak V.G., Tourova T.P., Sokolova D.Sh., Nazina T.N.
THE EFFECT OF THE PRESENCE OF TOXIC ADDITIVES IN THE POLYMER MATERIAL ON THE PROCESSES OF ITS BIODEGRADATION IN SEAWATER

The exposition of samples of cured polyester resin with the addition of metal oxides and cellulose (control sample) in the seawater of the Gelendzhik Bay of the Black Sea was carried out for 60 days. It was shown that eukaryotic diatoms, as well as prokaryotic blue-green algae (cyanobacteria) were the most numerous members of communities inhabiting the surfaces of samples. By sequencing the V4 region of the prokaryotic 16S rRNA gene and bioinformatic analysis of these results, it was shown that in fouling on samples with chromium, lead, zinc, and titanium oxides, the proportion of bacteria resistant to these metals increased, while bacteria potentially capable of degrading polyester resins formed a minor part of the communities.

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12.
dx.doi.org/ 10.18577/2307-6046-2022-0-12-135-144
УДК 620.1
Gorbovets M.A., Khodinev I.A., Monin S.A.
TESTS OF STRUCTURAL METALLIC MATERIALS FOR THE FATIGUE CRACK GROWTH RATE IN A CORROSIVE ENVIRONMENT (review)

Considers methods for testing steels and alloys for the fatigue crack growth rate when exposed to a corrosive environment. Preferably, these tests are carried out under simultaneous mechanical and corrosion action on compact eccentric tensile specimens. The composition of the environment is determined by the operating conditions of the product. In most cases, NaCl solutions of various concentrations are used. Fatigue crack growth rate is extremely sensitive to the parameters of the test environment and mechanical loading.

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13.
CONTENТS

Light-metal alloys

 

Khodakova E.A., Sviridov A.V., Skupov A.A., Stelnikovich A.Yu. Creation of plasma welding joints (review)

 

 

Polymer materials

 

Pravada E.S., Vakhrusheva Yа.A., Gerasimov D.M., Chaikun A.M. Rubber-based sealants (review)

 

Composite materials

 

Donetskiy K.I., Karavaev R.Yu., Bystrikova D.V., Gracheva A.D. Сarbon fiber based on a volume-reinforcing braided preform for an element of a propeller blade

 

 

Korolev D.V., Valeev R.A., Morgunov R.B., Piskorsky V.P. Effect of heat treatment of sintered Pr–Dy–Fe–Co–B magnets on their coercivity

 

 

Ivanov M.S., Sagomonova V.A., Morozova V.S. Domestic thermoplastic carbon plastic based on polyetheretherketone

 

 

Khodykin L.G., Nyafkin A.N., Kosolapov D.V., Zhabin A.N. Laser welding of metal composite materials based on aluminium alloy reinforced with refractory particles SiC (review)

 

Ponomarenko L.A. Mechanical properties of polymer composite materials based on knitted fillers with modified structure (review)

Protective and functional

coatings

 

Alexandrov D.A., Gorlov D.S. The Research of erosion resistance and residual stresses in layered ion-plasma coatings

 

 

Kozlov I.A., Fomina M.A., Demin S.A., Benarieb I., Khmeleva K.M. Use of metal powder compositions to remove defects of parts from VAS-1 alloy by cold gas-dynamic spraying method

 

 

Material tests

 

Chertishchev V.Yu., Boichuk A.S., Dikov I.A., Gorbovets M.A. Estimation of defect depth in multilayer PCM honeycomb during impedance testing with serial detectors

 

 

Laptev A.B., Zheleznyak V.G., Tourova T.P., Sokolova D.Sh., Nazina T.N. The effect of the presence of toxic additives in the polymer material on the processes of its biodegradation in seawater

 

Gorbovets M.A., Khodinev I.A., Monin S.A. Tests of structural metallic materials for the fatigue crack growth rate in a corrosive environment (review)

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