Articles

 

1.
№5-6, 2018
УДК 669.017:669.018.44
Toloraya V.N.1, Nekrasov S.N.1, Ostroukhova G.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • COMPARATIVE ANALYSIS OF STRUCTURE AND PROPERTIES OF CASTINGS FROM SUPERALLOYS PRODUCED ON UVNK AND PMP TYPE UNITS
    The article presents a review of data showing the influence of technology of the high-gradient directional solidification with cooling of casting mold in molten low-melting metal (aluminum or tin) on structure and properties of single-crystals of nickel-base superalloys in comparison with the directional solidification method with radiant cooling of the mold.
    Keywords: technology of the high-gradient directional solidification (HGDS), directional solidification method (DS), nickel-base superalloys, directional and single-crystal structures.


    2.
    №3-4, 2018
    УДК 669.293
    Kolodyazhny M.Yu.1, Bondarenko Yu.A.1, Yechin A.B.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • FORMATION OF THE NATURAL-COMPOSITE STRUCTURE OF LARGE-SIZED BILLETS OF THE EUTECTIC ALLOY OF THE Nb–Si SYSTEM
    A study of the directional crystallization process in a liquid metal cooler and also the features of the formation of a natural composite structure of a eutectic niobium-silicon alloy with respect to the production of large-sized gripping details for test machines are presented
    Keywords: directional crystallization, heat-resistant eutectic alloy, structure of a eutectic composite, silicide niobium, solid solution of niobium, short-term strength, long-lasting strength.


    3.
    №3-4, 2018
    УДК 669.018.44:669.245
    Ospennikova O.G.1, L.I. Rassohina1, Bityutskaya O.N.1, Gamasina M.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • DEVELOPMENT OF TECHNOLOGICAL PARAMETERS OF OBTAINING OF CASTINGS OF SHAPED COMPONENTS OF AIRCRAFT GAS TURBINE ENGINE MADE OF HEAT-RESISTANT NICKEL ALLOY VZh159
    The results of development of technological parameters of obtaining of castings of shaped parts made of cast version of alloy VZh159, superior in the properties of heat-resistant alloy of Nickel-chrome based EP648. The results of the study led to the conclusion that the use of the alloy VZh159 is possible for the manufacture of shaped castings of aircraft engine parts.
    Keywords: alloy VZh159, castability molded part of the «diffuser», gas turbine engines.


    4.
    №1-2, 2018
    УДК 669.018.44
    Kochubey A.Ya.1, Zhuravleva P.L.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • TEXTURAL CONDITIONS DIAGRAMS OF NICKEL SUPERALLOY AND MAGNESIAN ALLOY AT HOT AXISYMMETRIC COMPRESSION
    Axisymmetric hot compression experiments of nickel superalloy ЭК151 and MA5 alloy specimens in a wide temperatures and deformations intervals were carried out. Axial texture formation was studied by X-ray diffractometry methods. The complex studying method of texture forming depending on temperature and deformation was developed. The plotting method of textural diagrams is universal and is applicable for other based alloys.
    Keywords: hot plastic deformation, axisymmetric compression, axial texture, pole figure, X-ray diffractometry, textural condition diagrams.


    5.
    №1-2, 2018
    УДК 669.018.44:669.245
    Treninkov I.A.1, Filonova E.V.1, Medvedev P.N.1, Lukina E.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • TEXTURE AND MICROSTRUCTURE FORMATION IN THE NICKEL-BASE SUPERALLOY DURING SELECTIVE LASER MELTING
    The research of the texture and microstructure modification of the nickel-base superalloy ZHS6K-VI synthesised by the selective laser melting method with the different scan strategies (various speeds of scanning, power of a laser beam) was carried out by methods of X-ray and scanning electronic microscopy. The quantitative estimation of structure recrystallization the extent after selective laser melting was spend. The melting parameters influence on the structure changes was defined.
    Keywords: selective laser melting (SLM), texture, nickel-base superalloy, γ/γ′-phases.


    6.
    №1-2, 2018
    УДК 669.018.44:669.245
    Kapitanenko D.V.1, Razuvaev E.I.1, Sidorov S.A.1, Chebotareva E.S.2
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • [2] Bauman Moscow State Technical University
  • INFLUENCE OF «WORKPIECE–TOOL» TEMPERATURE GRADIENT ON HOT DEFORMATION OF NICKEL-BASED SUPERALLOYS
    Hardly-deformed heat-resistant nickel-based alloys have limited plasticity in narrow temperature interval of hot deformation and have a high sensitivity to the deformation rate. The results of hardly-deformed heat-resistant nickel-based alloys rolling researches shows efficiency of using controlled rolls heating and thermal insulation coating. Application of controlled rolls heating and glass enamel thermal insulation coating provides increase of technological plasticity, decrease of required technological force of deformation, decrease of deformed semi-finished products laboriousness and their quality improvement.
    Keywords: heat-resistant nickel-based alloys, rolls, manufacturing process, technology, heating, plasticity, rolling.


    7.
    №5-6, 2017
    УДК 669.017:669.018.44
    Ospennikova O.G.1, L.I. Rassohina1, Bityutskaya O.N.1, Gamasina M.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • THE STUDY OF FOUNDRY TECHNOLOGICAL AND STRENGTH CHARACTERISTICS OF THE CAST VERSION OF ALLOY ВЖ159, IN RELATION TO THE MANUFACTURE OF SHAPED CASTINGS OF PARTS OF AIRCRAFT GAS TURBINE ENGINES
    The results of studies of the technological properties of foundry and the basic strength characteristics of the cast version of alloy ВЖ159, superior in the properties of heat-resistant alloy of Nickel-chrome based ЭП648. ВЖ159 alloy has high weldability characteristics, including, in hardened condition, which ensures maintainability of parts and welded parts of it. It is concluded that the use of alloy ВЖ159 possible for the manufacture of shaped castings of parts of aircraft engines.
    Keywords: alloy ВЖ159, castability, fittings, gas turbine engines, strength, linear shrinkage, volumetric shrinkage.


    8.
    №5-6, 2017
    УДК 669.018.44:669.245
    Bakradzе M.M.1, Arginbaeva E.G.1, Petrushin N.V.1, Ovsepyan S.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • ASPECTS OF THE DEVELOPMENT OF CASTING NICKEL AND INTERMETALLICIDE ALLOYS. TECHNOLOGY OF MANUFACTURING GTE DETAILS
    The article describes the development of the direction of casting superalloys for high-temperature critical parts of gas turbine engines - the development of the first high-temperature nickel alloys with polycrystalline structure, the transition to directional and single-crystal structures, methods for calculating the chemical composition of alloys, the appearance of intermetallic and natural composite materials, manufacturing of parts from them.
    Keywords: nickel alloys, intermetallic, in-situ composites, high-temperature strength.


    9.
    №3-4, 2017
    УДК 621.74.045
    Ospennikova O.G.1, L.I. Rassohina1, Bityutskaya O.N.1, Gamasina M.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Optimization of manufacturing technology of ceramic rods to improve the quality of cast blades of gas turbine engines
    Considers the issues of improving the quality of castings of gas turbine engine blades with directional and single crystal structure related to the optimization of manufacturing technology of ceramic rods. Analysis of the obtained characteristics showed that the studied core compositions of its major properties meet the requirements for ceramic rods used in the casting of blades with directional and single-crystal structure. In particular, the use of a rod of mass С1В will reduce the marriage of warping of the ceramic rods at the time of casting and to increase the yield of cast blades on wall thickness.
    Keywords: ceramic rod, alloy blade, a gas turbine engine, ceramics, foundry.


    10.
    №3-4, 2017
    УДК 621.318.1
    Bondarenko Yu.A.1, Shubakov V.S.2, Zukov D.G.2
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • [2] National University of Science and Technology MISiS
  • The crystal structure and magnetic properties of the YuNDK35T5 alloys manufacturing by directional high-gradient solidification methods
    Influence of directional high gradient solidifications parameters for crystalline structure formation in permanent magnets alloys YuNDK35T5А without additives and alloyed by sulfur and carbon has been investigated. It is established that there is an opportunity to make industrial castings of permanent magnets YuNDK35T5А on the UVNS-5 installation, intended for smelting of shovels of gas-turbine engines. Features of change of alloys compositions, in high-gradient directed solidification process are investigated. Samples of permanent magnets with regular structure (column and single-crystal) and magnetic properties meeting the requirement of GOST 17809–72 and corresponding to the level of foreign analogs are manufacturing.
    Keywords: cast permanent magnets YuNDK, column grain structure magnets, single-crystal magnets, directional high-gradient solidification, magnetic properties, high coercive station, crystallization range.


    11.
    №2, 2017
    УДК 621.98.043:669.245
    Sidorov S.A.1, Bazhenov A.R.1, Chebotareva E.S.2
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • [2] Bauman Moscow State Technical University
  • Development of the theory and practice of production of punchings of disks of from gas turbine engines of heterophase nickel-based superalloys
    The article presents information about development of technological processes used for manufacturing discs of gas turbine engines connected with the increasing complexity of the chemical and phase composition of nickel-based superalloys. The article shows efficiency of hot deformation processes under solvus temperature provided preliminary thermomechanical treatment which provides high technological ductility of workpiece.
    Keywords: gas turbine engines discs, nickel-based superalloys, deformation, isothermal forging, hot isostatic pressing.


    12.
    №2, 2017
    УДК 669.245
    Volkov A.M.1, Vostrikov A.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Nucleation and growth of grains in P/M Ni-base superalloys for disks application
    The processes of grain boundaries formation in PM Ni-base superalloys are reviewed in the article. The powder are produced by various methods namely gas atomization and plasma rotate electrode process. It was shown that the grain size after hot isostatic pressing (HIP) is about 1/3 from initial powder size. This approximately ratio practically does not depend on powder production method. The work is executed within implementation of the complex scientific direction 10.2. «Isothermal deformation on air of new generation of heterophase difficult deformable hot strength alloys» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)
    Keywords: disk billet, jet-engine, powder, Ni-base superalloy, microstructure, grain, recrystallization, HIP.


    13.
    №5, 2016
    УДК 543.51:669
    Alekseev A.V.1, Yakimovich P.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Determination of copper, zinc, arsenic and selenium in complex alloyed high temperature nickel alloys using ICP-MS
    Now in the modern aviation industry and engine manufacturing high temperature nickel alloys are used in the manufacture of critical parts experiencing during its work, the huge thermal and power load. On the properties of the produced materials significant negative impact can have impurities of different elements. Therefore, an important task is to control the chemical composition of nickel alloys, especially the content of trace impurities, which include copper, zinc, arsenic and selenium. In this work the determination of copper, zinc, arsenic and selenium in certified reference materials of complexly alloyed Nickel alloys using the method of mass spectrometry with inductively coupled plasma (ICP-MS). The method of dissolution of the sample and its preparation for analysisis described. Applied various methods of eliminating spectral interferences: the reaction-collision cell, or a mathematical correction. The detection limit was, % of the mass: 0,00005 Cu; 0,00007 Zn; 0,00005 Se; 0,
    Keywords: inductively coupled plasma mass spectrometry (ICP-MS), nickel alloys, determination of copper, determination of zinc, determination of arsenic, determination of selenium, microwave sample preparation.


    14.
    №5, 2016
    УДК 669.017
    Lukina E.A.1, Korolyov V.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Features of process of the selection laser synthesis with reference to cast alloys on the basis of nickel and Ni3Al intermetallic compound
    The formation of track-structure in the crystallization under selective laser melting process of cast Ni-base superalloys and Ni3Al superalloys metal powders is reviewed in the article. Carried experiments has shown that the tracks are consist of the cells, which are joined in sub-grains. Their boundaries are often decorated of direct carbide and primary γ'-phase nets. It is established that crack formation due to internal stresses is carried on grain boundaries. It is shown that the heating of the building platform promotes to reducing of cracks amount. The further thermovacuum treatment and hot isostatic pressing provide formation of bulk material without cracks and with favorable morphology of γ'-phase.
    Keywords: selective laser melting, intermetallic superalloys, Ni3Al, track structure, cell ctructure.


    15.
    №4, 2016
    УДК 621.762
    The use of welded and powder casting superalloys produced by FGUP «VIAM» for the repair of gas turbine engine components laser gas powder braze
    In article aspects of use of domestic metal powders of the welded EP718 and foundry alloys of VZhL12U and VKNA-1VR to restore the geometry of laser gas turbine engine parts by braze. The morphology of the particles and the fractional composition of the applied powder materials. Are investigated influence of key parameters of a braze on geometry of the built-up material. The features of formation of structure of the deposited material, change the height of microhardness and base material. It is shown that the optimum exhaust braze modes provides a dense structure of dendritic structure without cracks, pores, neproplavov.
    Keywords: laser gas powder braze, metal-powder composition, protective environment, dendritic structure, cellular structure, micro-hardness, the braze material


    16.
    №1, 2016
    УДК 621.742.4
    Ospennikova O.G.1, L.I. Rassohina1, P.I. Parfenovich1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Development of the compositions оf the model compositions of a new generation with improved characteristics for the manufacture of blades and other turbine engine parts
    The results of studies of the development of the composition of the model composition of a new generation for the manufacture of lost wax models of parts of gas turbine engines were discussed. Experimental compositions of the model compositions were tasted and their physic-mechanical properties and rheological characteristics were studied. The interaction of the model composition with the materials of ceramic forms, including the oxides of rare earth metals was studied. The ceramic forms were made by serial technology using the model composition MK-24. The ceramic forms were filled with alloy VZHL21 on the installation UPPF-U. Quality control of castings by non-destructive methods showed the absence of metallurgical defects. The developed compositions fully meet of domestic and foreign counterparts, as evidenced by the test results. The following names were assigned to the model compositions: VIAM MK-1 (MK-24), VIAM MK-2 (MK-26), VIAM MK-L (VIAM-2MK).
    Keywords: investment casting, model compositions, shell shape, polymeric resin, terephtalic acid, gas-turbine engine blade


    17.
    №1, 2016
    УДК 669.14
    Mikhaylov M.S.1
  • [1] Сentral research institute of structural materials "Prometey"
  • The study of carbide formation in middle-carbon high-strength steels
    The paper examined the process of carbide formation and phase transformations in the medium-carbon high-strength steels for the agricultural industry. The research was performed by analysis of differential dilatometric curves and transmission electron microscopy.
    Keywords: middle-carbon highstrength steel, carbides, diathometry, TEM.


    18.
    №6, 2015
    УДК 620.193
    Choice of materials for closing valves in the conditions of oil refining
    The material choice for the equipment working under the influence of hostile environment, pressure and temperatures assumes integrated approach to tests. In this work steel 20Х13 researches for the purpose of assessment of possibility of its application for manufacturing of valves maintained in the conditions of oil refining are conducted.


    19.
    №6, 2015
    УДК 669.245'1:620.178.38
    STRUCTURAL CHANGES IN ALLOY EK-61 IN THE CONDITIONS OF CYCLIC DEFORMATION AT ELEVATED TEMPERATURE
    It has been shown that at high cyclic deformation at elevated temperatures in high-alloyed iron-nickel superalloy EK-61are forming crystallographically oriented lamellar preciptations identified as -phase Ni3Nb. Generation of -phase precipitates occurs at grain boundaries and incoherent interphase boundaries of carbides (Nb, Ti) C. Revealed that more -phase observed in samples with a high content of niobium within the brand EK-61. Fatigue tests and subsequent structural studies have proofed a decrease of fatigue limit in samples with a high content of -phase.
    Keywords: ageing, instability of structure, over ageing, cyclic deformation, fatigue limit.


    20.
    №4, 2015
    УДК 621.762.55
    O.V. Vasileva1, P.A. Kuznetcov1, V.V. Bobyr1
  • [1] Federal state unitary enterprise «Central Research Institute of Structural Materials «Prometey» State research center of the Russian Federation
  • STRUCTURE AND PROPERTIES OF STAINLESS STEEL 316L, 410L, 17-4 PH, MANUFACTURED BY SELECTIVE LASER MELTING PROCESS
    Technologies of additive manufacturing widely used in various fields of industry. In this article the results of structure and mechanical properties research of stainless steels different grades manufactured by SLM are presented. In comparsion to the traditional technologies, there is a trend to increase strength and decrease ductility.
    Keywords: additive manufacturing, selective laser melting, stainless steel powders.