Articles

 


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1.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-3-12
УДК 621.791.724
Nikiforov A.A., Dyomin S.A., Khmeleva K.M.
ELECTROCHEMICAL TREATMENT OF PARTS OBTAINED BY SELECTIVE LASER FUSION

The use of additive technologies for the production of parts is one of the main trends in recent years in the field of industrial production. Application of the technology of «layer-by-layer growing» provides savings in materials, a significant reduction in labor intensity, and allows you to create parts of any complexity and configuration.

To reduce the surface roughness values of parts manufactured using additive technology, the authors proposed a method of electrochemical treatment in acid electrolytes, which makes it possible to achieve a decrease in surface roughness values by more than 5 times compared to the original one, and to process parts of any complexity and configuration.

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2.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-13-21
УДК 669.715
Astashkin A.I., Babanov V.V., Selivanov A.A., Tkachenko E.A.
STRUCTURE AND PROPERTIES OF MASSIVE FORGINGS WITH A REDUCED LEVEL OF RESIDUAL STRESSES MADE OF ALUMINUM ALLOY 1933sb OF BALANCED COMPOSITION

Based on the results of comparative studies and tests, the article shows the advantages of massive forgings with a reduced level of residual stresses made of 1933sb alloy balanced composition in comparison with similar serial semi-finished products. Massive forgings with a thickness of 100–150 mm from a 1933sb alloy of a balanced composition have a lower (more than 2 times) level of quenching residual stresses with strength characteristics increased (by 30–40 MPa and higher), especially in the direction of transverse in thickness (more than 10 %), the level of elongation and fracture toughness.

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3.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-22-30
УДК 669.295
Vasilev A.I., Panin P.V., Putyrskiy S.V., Rogalev A.M.
INVESTIGATION OF HOT ISOSTATIC PRESSING AND HEAT TREATMENT EFFECT ON STRUCTURE AND MECHANICAL PROPERTIES OF 3D-PRINTED SAMPLES MADE FROM VT6-PS GRADE MATERIAL

Presents the results of the investigation of the influence of hot isostatic pressing and heat treatment on the structure and mechanical properties during tension of synthesized workpieces obtained by selective laser alloying from a metal-powder composition of VT6 alloy. The blanks were subjected to heat treatment at various temperatures in the state after synthesis, as well after HIP. The influence of different heat treatment modes was assessed by the results of tensile tests and structural researches.

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4.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-31-38
УДК 669.017.165:669.295
Skupov A.A., Sviridov A.V., Khodakova E.A., Afanasiev-Khodykin A.N.
CREATION OF JOINTS FROM INTERMETALLIC TITANIUM ALLOYS (review)

An review of studies on the development of technologies for creating joints of intermetallic titanium alloys is presented. Today, electron beam welding is most common method for producing welded joints of this class of alloys. Brands of filler materials and solders used for intermetallic titanium alloys, as well as the properties that can be obtained when using them, are given. Approaches to the choice of welding technology that ensure the production of high-quality joints with the required characteristics are described.

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5.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-39-47
УДК 546.82
Makushina M.A., Kochetkov A.S., Nochovnaya N.A.
CAST TITANIUM ALLOYS FOR AVIATION EQUIPMENT (review)

This article discusses cast titanium alloys used in the construction of aircraft products and engines. Descriptions of the casting properties of titanium alloys are presented. The requirements for castings made of titanium alloys specified in the industry regulatory and technical documentation are set out. The main characteristics of their properties, advantages and disadvantages are considered. Some methods of increasing the parameters of mechanical properties are described. Conclusions are drawn about the current situation in the field of aviation foundry titanium alloys and products made from them.

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6.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-48-58
УДК 678.8
Kablov E.N., Kondrashov S.V., Melnikov A.A., Pavlenko S.A., Guseva M.A., Pykhtin A.A., Larionov S.A.
INVESTIGATION OF THE INFLUENCE OF THE THERMAL REGIME OF FDM PRINTING ON THE STRUCTURING AND WARPING OF POLYETHYLENE SAMPLES

The study of the influence of the temperature of polyethylene printing on the dimensional stability of samples obtained by the method of FDM printing has been carried out. It is shown that a change in the temperature of the nozzle from 200 to 260 °C leads to a decrease in the deviation from the plane by a factor of eight. In this case, the tensile strength remains practically unchanged, and the elongation increases by 30 %. It has been established by the methods of rheological and microstructural studies that the observed effect is associated with a change in the structure of polyethylene, which is initiated by an increased temperature of the printer's extruder head. It has been suggested that the likely reason for the change in the structure of polyethylene is a change in the course of the crystallization process due to partial thermal oxidative destruction of the polymer matrix in the extruder head of a 3D printer.

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7.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-59-72
УДК 691:699.844
Shuldeshov Е.М., Kraev I.D., Obraztsova E.P.
MATERIALS FOR SOUND-PROOF DESIGNS OF AIRCRAFT ENGINES (review)

An overview of applied sound-proof designs, and also the directions of researches on improvement both designs, and materials applied to their manufacturing. The advantages and disadvantages of the existing ZPK options are considered. The main approaches to the solution of question of increase of acoustic efficiency of sound-proof designs are classified and described. Advantages and shortcomings of practical implementation of each approach are given. The conclusion is drawn on the most perspective direction of researches.

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8.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-73-85
УДК 678.8
Zagora A.G., Tkachuk A.I., Terekhov I.V., Mukhametov R.R.
METHODS OF CHEMICAL MODIFICATION OF EPOXY OLIGOMERS (review)

This paper is devoted to one of the most pressing problems of modern non – metallic materials science-chemical modification of thermosetting systems based on epoxy oligomers with active diluents and bismaleimides: polymer binders for reinforced plastics, adhesives, compounds, sealants, and protective paint coatings. Based on the analysis of domestic and foreign scientific literature, as well as patents for inventions, a conclusion was made about the prospects for further research in this direction. The use of these types of modifiers can increase the chemical resistance, crack resistance, strength, impact strength, heat resistance and other valuable properties of polymer composite materials (PCM) based on an epoxy polymer matrix.

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9.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-86-94
УДК 669.295
Duyunova V.A., Oglodkov M.S., Gerasimov M.V., Kozlov I.A., Knyazev A.V.
FEATURES OF FORMATION OF ELECTROLYTE-PLASMA COATINGS FROM NICKEL-CONTAINING ELECTROLYTES ON TITANIUM ALLOYS

Influence of nickel sulfate additives in silicate-alkaline electrolyte for microarc oxidation of titanium alloys on properties of formed electrolyte-plasma coatings was investigated. The influence of the component composition of the electrolyte on the chemical composition of the coatings, their protective ability, porosity and electrical characteristics was established. It is shown that the most corrosion-resistant coatings are formed from electrolytes with a low content of nickel sulfate, and an increase in the content of nickel in the coating does not lead to a significant change in its electrical conductivity.

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10.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-95-102
УДК 66.017
Vorobev N.N., Barinov D.Y., Pahomkin S.I.
COMPUTATIONAL AND EXPERIMENTAL STUDY OF THE EFFECTIVE THERMAL CONDUCTIVITY OF FIBROUS MATERIALS

The article is devoted to the evaluation of the effect of porosity on the effective thermal conductivity of thermal insulation materials. The main factors influencing the thermal conductivity of the material, such as density, the type of porous structure of the material and humidity, are considered. The method of measuring the thermal conductivity by the stationary heat flow method and the hot zone method is described. A method for calculating the effective thermal conductivity of fibrous materials is presented. A computational and experimental study of the effective thermal conductivity is carried out and the results are analyzed.

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11.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-103-111
УДК 543.51; 669.1
Alekseev A.V., Orlov G.V., Petrov P.S.
ANALYSIS OF COBALT AND NICKEL BASES CATHODES BY X-RAY FLUORESCENCE SPECTROSCOPY

In this work, Al, Cr, Cu, Fe, Ni, Si and Y were determined in SDP-6 cathodes based on cobalt and SDP-1 and AZh8 nickel-based cathodes by x-ray fluorescence spectroscopy. The calibration dependences are corrected taking into account the superposition of signals from interfering elements on the analytical signal and changes in intensity caused by inter-element influences in the matrix. A standard-free analysis was carried out using the method of fundamental parameters. The correctness of the results obtained was confirmed by a comparative analysis by atomic emission spectroscopy and high-resolution mass spectrometry with a glow discharge.

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12.
dx.doi.org/ 10.18577/2307-6046-2021-0-7-112-124
УДК 929(092)
Kitaeva N.S., Shiryakina Yu.M., Mukhametov R.R., Shitov R.O.
NIKOLAY SEMENOVICH LEZNOV: BIOGRAPHY AND CONTRIBUTION TO THE DEVELOPMENT OF SCIENCE

The main life stages of a doctor of technical sciences, professor, honored worker of science and technology of the RSFSR, a major specialist in the field of creation and implementation of polymers for new aviation materials, whose name was Nikolai Semenovich Leznov (12/17/1904–06/25/1984), were considered. The scientific works and achievements of the founder of the laboratory for the synthesis of polymers, binders for non-metallic materials, special liquids and physical and chemical studies of polymer materials of VIAM were analyzed and described.

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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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Andrey V. Alekseev

Researcher, Candidate of Sciences (Bio.)

Alexander I. Astashkin

Second Category Engineer

Alexander N. Afanasev-Khodykin

Head of Sector

Vitaly V. Babanov

Leading Engineer

Dmitry Ya. Barinov 

Second Category Engineer

Anton I. Vasilev

Engineer

Nikita N. Vorobev 

Engineer

Marina A. Guseva

Senior Researcher, Candidate of Sciences (Chem.)

Semyon A. Demin 

Leading Engineer

Victoria A. Duyunova 

Head of Scientific-Research Bureau, Candidate of Sciences (Tech.)

Artem G. Zagora

Second Category Engineer

Andrey V. Zuev 

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

Evgeny N. Kablov

Director General, academician of RAS

Natalya S. Kitaeva

Leading Engineer

Andrey V. Knyazev

Leading Engineer

Ilya A. Kozlov 

Head of Laboratory, Candidate of Sciences (Tech.)

Stanislav V. Kondrashov

Deputy Head of the Laboratory for Science, Doctor of Sciences (Tech.)

Alexey S. Kochetkov

Head of Sector, Candidate of Sciences (Tech.)

Ivan D. Kraev

First category engineer-technologist

Sergey A. Larionov

First Category Engineer

Marina A. Makushina

Engineer

Andrey A. Melnikov

Leading Researcher, Candidate of Sciences (Tech.)

Ramil R. Mukhametov

Head of Laboratory, Candidate of Sciences (Tech.)

Andrey A. Nikiforov

Head of Sector

Nadezhda A. Nochovnaya 

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

Elena P. Obraztsova

Engineer-technologist

Mikhail S. Oglodkov

Deputy Head of Scientific-Research Bureau, Candidate of Sciences (Tech.)

Gennady V. Orlov

Leading Engineer

Sergey A. Pavlenko

Second Category Engineer

Pavel V. Panin  

Leading Researcher, Candidate of Sciences (Tech.)

Stanislav I. Pakhomkin  

Leading Engineer

Pavel S. Petrov 

First Category Technician

Stanislav V. Putyrskiy

Deputy Head of Laboratory

Alexander A. Pykhtin

Candidate of Sciences (Tech.)

Aleksey M. Rogalev

Head of Sector

Alexander V. Sviridov

Head of Laboratory, Candidate of Sciences (Tech.)

Andrey A. Selivanov

Head of Laboratory, Candidate of Sciences (Tech.)

Aleksey A. Skupov

Head of Sector, Candidate of Sciences (Tech.)

Ivan V. Terekhov

Senior Researcher, Candidate of Sciences (Chem.)

Evgeniya A. Tkachenko

Senior Researcher

Anatoly I. Tkachuk

Head of Sector, Candidate of Sciences (Chem.)

Ksenia M. Khmeleva

Technician

Elizaveta A. Khodakova

Leading Engineer

Yulia M. Shiryakina

Senior Researcher, Candidate of Sciences (Chem.)

Roman O. Shitov 

Second Category Engineer

Evgeny M. Shuldeshov 

Candidate of Sciences (Tech.)

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences;

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Mikhail V. Gerasimov

Senior Researcher,  Candidate of Sciences (Tech.)

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