Articles

 

Testing of materials and structures

1.
№5-6, 2018
УДК 66.017
Kochubey A.Ya.1, Treninkov I.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • THE DIFFRACTION ANALYSIS OF THE WHITE X-RADIATION ON CRYSTALS BY EWALD STRUCTURE AT DIRECT POLAR FIGURES CONSTRUCTION
    The diffraction analysis of a white X-radiation on twirled crystal lattices with application of Ewald structure is carried out. Assay values are applicable in crystal structure researches in which twirl of crystals is applied, in particular, at construction of direct polar figures. Ewald structure studies communication between parametres of X-ray shooting and the maintenance of direct polar figures of crystals. It is shown, that for construction of a crystal direct polar figure with application of a white X-radiation it is not required to any additional information on a crystal structure of an investigated material
    Keywords: continuous roentgen spectrum, white X-radiation, X-ray crystal analysis, crystal structure, Ewald structure.


    2.
    №3-4, 2018
    УДК 66.017
    Kochubey A.Ya.1, Treninkov I.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • THE CONTINUOUS ROENTGEN SPECTRUM APPLICATION FOR CONSTRUCTION OF DIRECT POLAR FIGURES OF CRYSTALS
    Physical principles of construction of direct polar figures are stated at roentgen radiation of crystals in a continuous roentgen spectrum. Basic differences of such construction from construction of direct polar figures with application of a monochromatic х-radiation are specified. Communication of parametres of х-ray experiment with quantity of poles on a direct polar figure is shown. Conditions of reception of direct polar figures with demanded quantity of families of poles are defined. Possibility of application of the most widespread х-ray diffractometers is shown at the solution of the observed problems.
    Keywords: continuous roentgen spectrum, white х-radiation, х-ray crystal analysis, crystal structure, metal research.


    3.
    №3-4, 2018
    УДК 620.1:678.8
    Nikolaev E.V.1, Pavlov M.R.1, Andreeva N.P.1, Slavin A.V.1, Skirta A.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • INVESTIGATION OF THE AGING PROCESSES OF POLYMERIC COMPOSITE MATERIALS IN NATURAL CONDITIONS OF TROPICAL CLIMATE OF NORTH AMERICA
    On the example of polymer composite materials of three types: carbonic fiber, fibreglasses and organic fiber, for aviation purposes, a study was made of the influence of the combination of climatic factors in the weathering of the tropical climate of North America on the firmness of their strength characteristics at normal and higher temperatures, and structural effects climatic effects is carried out. The paper presents the results of Arizona-test (tropical dry climate) and Florida-test (tropical wet climate).
    Keywords: polymeric composite materials, climatic factors, aging, structural transformations, strength characteristics of polymer composite materials.


    4.
    №1-2, 2018
    УДК 539.26
    Kochubey A.Ya.1, Treninkov I.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • APPLICATION OF THE WHITE X-RADIATION IN THE STRUCTURAL ANALYSIS OF CRYSTAL MATERIALS
    A crystal structure analysis of different materials by construction of pole figures in white (continuous spectrum) a X-radiation and them indicating was carried out. On polе figures types of crystal lattices and them crystal system was defined. Pole figures from metals with different type of a cubic lattice was built and analysed: silicon (a diamond lattice), molybdenum (body-centered) and nickel (face-centered).
    Keywords: white X-radiation, X-ray crystal analysis, crystal structure, metal research.


    5.
    №5-6, 2017
    УДК 669.018.44:620.178.322.2
    Belyaev M.S.1, Gorbovets M.A.1, Shvedov V.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • THE INFLUENCE OF TEST CONDITIONS ON THE LOW CYCLE FATIGUE AND PARAMETERS OF CYCLIC DEFORMATION OF SUPERALLOY VZH175
    Investigation of low-cycle fatigue of superalloy VZh175 held at a given total strain Δεt and temperatures 20, 650, 750°С. Smooth samples with a diameter of 5,0 mm has been tested at a loading frequency of 1 Hz on the basis of 104 cycles. Analyzed the change of the loops of the elastic-plastic hysteresis depending on the number of cycles and test temperature. Width of the hysteresis loop εin ambiguous varies with temperature. The middle line of low cycle fatigue is built and the values of the endurance limits determined. Most high limit of LCF superalloy VZh175 has at room temperature. Also characteristics of LCF determined by the accumulated strain εn.
    Keywords: low сycle fatigue (LCF), elastic-plastic hysteresis, inelastic deformation, characteristics of LCF, superalloy VZh175.


    6.
    №5-6, 2017
    УДК 678.06:629.7
    Naumov I.S.1, Petrova A.P.1, Barinov D.Ya.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • THERMOGRAVIMETRIC ANALYSIS OF SEALING RUBBERS WITH THE LOWERED COMBUSTIBILITY IN THE ENVIRONMENT OF INERT GAS(ARGON)
    Thermogravimetric analysis in argon environment of rubbers of sealing assignment, including the rubbers possessing lowered combustibility both in the initial condition, and with addition of finely dispersed flame retardants is carried out. Influence of used flame retardants on thermogravimetric characteristics of the received rubbers with the lowered combustibility is investigated.
    Keywords: organic silicon and ethylenepropylene-diene rubbers, flame retardant, combustibility, aluminum hydroxide, magnesium hydroxide, decabromdiphenyl oxide, TGM-analysis.


    7.
    №3-4, 2017
    УДК 666.1.056:621.793.7
    Aliev A.A.1
  • [1] Federal State Unitary Enterprise «NIIAE»
  • Research of material of reflectors of headlights of lighting devices for the purpose of determination of the causes of defect of «orange-peel» and development of technical solutions on his elimination
    Researches of material of reflectors of headlights from the cold-rolled tape of steel 08Yu of lighting devices for the purpose of determination of the causes of defect of «orange-peel» in the course of their production are conducted by cold stamping. It is established that the non-uniform structure of the applied material 6–10 points is ferrite grain size the cause of defect. Technical solutions for elimination of defect of «orange-peel» are developed and introduced.
    Keywords: reflector headlights, reflector, lighting engineering, «orange-peel» defect.


    8.
    №2, 2017
    УДК 629.7.023
    Filonova E.V.1, Markov A.B.2
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • [2] Federal State Budgetary Institution of Science Institute of High Current Electronics, Siberian Brunch Russian Academy of Sciences
  • The high-current pulse electronic bunches for surface engineering ion-plasma coverings
    In communication of modern aircraft equipment service conditions complication and toughening the problem of materials and the types of their processing providing along with high durability increase aviation engine the most loaded details and knots operational properties level (first of all blades and compressor and turbine disks) creation, became extremely actual. That is the most important problem of modern aviation engine-building. The solution of this task is carried out with use of several approaches: perspective high-alloyed polycrystalline and single-crystal alloys development; manufacturing, formation and processing products and preparations modernization; details superficial processing new methods development and drawing on their surface of various protective coatings. Recently the special attention is given to high-intensity methods of superficial engineering of rather wide nomenclature details development and extremely fast introduction of created on their basis technical p
    Keywords: radiation by the high-current electronic beams, the condensed ion-plasma coverings, structural and phase condition, microstructure research.


    9.
    №2, 2017
    УДК 620.179
    Kochubey A.Ya.1, Treninkov I.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Definition single crystals orientation parametres of nickel-base superalloys by diffractometer method
    Definition Single crystals orientation parametres of nickel-base superalloys by diffractometer method is developed, including a mosaic structure, i.e. without application of Laue method. The method allows: to size up quantity of mosaic blocks in a crystal; to define crystallographic orientation of each block in the sample axes; to define misorientation blocks among themselves; to make samples with regulated crystallographic orientation for quantitative analysis of single crystals structure; to define a relationship orientation of single crystals substrate and coating, etc.
    Keywords: single crystals, nickel-base superalloy, crystallographic orientation, mosaic structure.


    10.
    №2, 2017
    УДК 66.017
    Interlaminar fracture toughness and fractography of epoxy and bismaleimide carbon composites
    The work was focused on the definition of dominating energy dispersion mechanisms at delamination of woven carbon fiber polymer composites VKU-39 and BMI-3/3692 in the conditions of mode I (transverse tension) and mode II (shear). The results of structural and fractographic research of composites are presented in the work. It is shown that crack distribution in investigated composites can occur in the conditions of mode, distinct from the mode provided by the sample loading scheme.
    Keywords: polymer composite, thermoset-thermoplastic blend, woven fabric, interlaminar fracture toughness, DCB, ENF, optical microscopy, fractography, scanning electron microscopy.


    11.
    №6, 2016
    УДК 678.747.2
    Andreeva N.P.1, Pavlov M.R.1, Shvedkova A.K.1, Nikolaev E.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Climatic tests according to resistance of materials to conditions of sea Arctic and Subarctic climates
    The study of climate resistance of non-metallic polymer materials for complex technical systems and structures used in the cold climate of the Arctic zone, is an important issue in the selection and development of the material. The materials should have the persistence of physical and mechanical properties not only in conditions of low temperatures and temperature changes, but to be resistant to high humidity and the influence of maritime climate. As part of the research climate resistance of materials for Arctic operation conditions for the grant program of the Russian Science Foundation (рroject №14-33-00032) has developed the technique of assessment of climatic resistance of non-metallic materials for storage and operation in the area of the Arctic and subarctic climates (MM1.595-20-470–2015). The technique allows researching the influence of the alleged climate of storage and operation factors on the structure changes and strength properties of the materials. And also can be used
    Keywords: climatic tests, non-metallic polymeric materials, Arctic climate.


    12.
    №5, 2016
    УДК 621.763
    Sokolov E.G.1, Ozolin A.V.1, Kozachenko A.D.2
  • [1] Federal State Budgetary Institution of the Higher Education «Kuban state university»
  • [2] Joint Stock Company «NC «Rosneft» – Research-and-Technical Centre»
  • Influence of cobalt on the process of brazing of diamond-abrasive tools by Sn–Cu–Co–W composite brazes
    It was researched the influence of cobalt powder on the viscosity of composite brazes Sn–Cu–Co–W and on the hot cracking of brazed diamond-impregnated layers. The object of the study was the process of brazing of shaped diamond-abrasive tools by composite brazes Sn–Cu–Co–W. Purpose – to determinate the optimal content of cobalt powder in the composite brazing alloy, ensuring the formation of uniform diamond-bearing coatings on complex shaped surfaces of diamond tools. For experimental studies was prepared the brazing paste Sn–Cu–Co–W with a cobalt powder content of 20 to 34% (wt.). Brazes without diamonds were applied to the cylindrical rollers with a diameter of 20 mm, made of steel St.3. The mixture of braze and AS150 diamonds (400/315 micron grain size) containing 25% of diamonds (by volume) was applied to the shaped rollers with a maximum diameter of 85 mm, made of steel 45. Samples were dried and annealed in vacuum at 820°C for 40 minutes exposure. It is found that with increas
    Keywords: cobalt, composite brazing, viscosity, diamond tool.


    13.
    №5, 2016
    УДК 669.017
    Kochubey A.Ya.1, Medvedev P.N.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Direct pole figures in the study of structure formation processes during heating of deformed metals and alloys
    Work is executed within implementation of the complex scientific direction 2.1. «Fundamental the oriented researches» («The strategic directions of development of materials and technologies of their processing for the period till 2030») [1, 2]. The paper presents the methodological research bases of structure formation processes during heating of deformed metals and alloys using direct pole figures [3, 4]. The connection of structural transformations with the respective stereographic projection and direct pole figures changes obtained by x-ray has been shown [5, 6]. Examples of research and primary recrystallization process using direct figure pole have been demonstrated.
    Keywords: straight pole figure, X-ray analysis, heat treatment, recrystallization


    14.
    №4, 2016
    УДК 620.1:669.055
    Development of elementary constructive and similar samples and their compression tests
    In article one of approaches of development of elementary constructive and similar samples and carrying compression tests for is considered at static and repeated loadings when using the patented adaptation. Research were executed within realization of the complex scientific direction 6.2. «Layered metalpolymer, bimetallic and hybrid materials» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)
    Keywords: compression, structural test samples, aluminum-lithium alloys, wing panel fragments, a hybrid material


    15.
    №3, 2016
    УДК 621.983.7
    Shishkin A.A.1
  • [1] Research and Development Production Enterprise «Zvezda» Join-Stock Company named after academician G.I. Severin
  • Researching of the extreme performance of the reduction of thin-walled tubular billets in the production of pressure vessels
    The extreme performance of the reduction of tubular billets by axial force in a rigid die is theoretically and experimentally researched. It is established that the cause of circumferential loss of stability is the heterogeneity of the properties of materials. The mathematical models, giving the possibility to calculate stress-strain state and maximal reduction ratios, are presented. The calculations were experimentally verified. Abnormal limiting factors of reduction with local heating, such as softening of the force transmission zone and jamming of the edge, were defined.
    Keywords: reduction of tubes, thin-walled billet, loss of stability, forming with heating, isothermal stamping.


    16.
    №3, 2016
    УДК 620.178
    Semenychev V.V.1, Panarin A.V.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Application of sclerometry for more informativeness measured characteristics of chromium and nickel coatings
    On 12H18N9T steel samples was deposited chromium and nickel coatings thickness 20–25 μm, wherein the used standard electrolytes & electrolytes containing nanoscale particles. The measured values of coatings microhardness showed, that this value considerably depends on in which electrolyte was formed this or another coating. With loads 50 and 70 N were applied scratches by diamond indenter from developed sclerometer on samples with different types of galvanic coatings. These grooves investigated by microscopic methods, evaluated the width, depth and morphology of the bottom & banks of scratches. It’s found, that the geometric parameters of the grooves depend on composition of used electrolytes. So, standard chromium coating characterized by maximum width & depth of the grooves in contrast to chromium coatings formed in cluster electrolytes, where this parameters have the smaller values. At the bottom of the grooves on standard nickel coating found a cracks perpendicular to the grooves
    Keywords: sclerometry, galvanic functional coatings, metallography, groove geometry analysis, microhardness.


    17.
    №1, 2016
    УДК 539.26:548.4
    Treninkov I.A.2
  • [2] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • High speed x-ray laboratory setup for determination of single-сrystal orientation and evaluation of structure perfection
    We have demonstrated a high speed of operation and an efficiency of the experimental laboratory setup under control of the software module including a system of recognition of the single-crystal Laue diffraction pattern.
    Keywords: Laue method, determination of a single-crystal orientation.


    18.
    №6, 2015
    УДК 621.873:539.4
    Destruction of the load gripping device in use
    A diagnosis of the technical state of weight-handling straps in operation and those rejected in case of unacceptable damages is completed. A comprehensive study of mechanisms’ and causes of accidental destruction of the strap bracket has been conducted. The results of experiments and calculations are provided.
    Keywords: weight-handling straps, diagnosis, safety, damages, defects, destruction, durability.


    19.
    №6, 2015
    УДК 621.785.532
    Analysis and prognostication of operating failures of the gearbox of the gas turbine engine units after ion nitriding
    Analysis of the causes of the typical failures of gears is presented in this paper, and also the method of ion nitriding with hollow cathode effect (HCE) to prevent them is offered. The influence of the ion nitriding with HCE on the microhardness and growth of the hardened layer was investigated.
    Keywords: ion nitriding, hollow cathode effect, chemical heat treatment, gear.


    20.
    №6, 2015
    УДК 629.7.018.4:669.245
    FRACTOGRAPHIC RESEARCH OF LOW-CYCLIC FATIGUE FAILURE OF TURBINE DISK BY METHOD OF SCANNING ELECTRON MICROSCOPY
    Fractographic research of the mechanism of development of fatigue crack in the turbine disk of alloy ЭП742 in combination application of numerical and analytical methods of calculation intense the deformed condition of alloy in top of crack has allowed to determine by method of scanning electron microscopy the speed of low-cyclic fatigue failure of disk in use.
    Keywords: fraktografiya, scanning electron microscopy, low-cyclic fatigue, factor of intensity of tension, nickel-base superalloy EP742, kinetic model of fatigue failure.


    21.
    №5, 2015
    УДК 629.113
    RATED PILOT STUDIES OF MECHANICS OF DESTRUCTIONS OF LOAD-CARRYING STRUCTURES OF THE LAND VEHICLES EXECUTED FROM METAL AND NON-METALLIC MATERIALS
    The paper presents the results of computational and experimental research of fracture mechanics of ground vehicles bearing structures (such as shift buses) in emergency static and dynamic loads conditions in accordance with international regulations.
    Keywords: elastoplastic fracture, deformation, sandwich panels.


    22.
    №5, 2015
    УДК 621.669.296.011
    Mastering of procedure and estimation of threshold stress intensity factor K1н in dhc tests of Zircaloy-4 cladding tube
    Proposed new procedure of testing cladding tubes for determination of threshold stress intensity factor (K1н) during delayed hydride cracking (DHC). In the range of temperatures 228–303°C determined temperature dependence K1н and assessment of DHC velocity for the hydrogenated Zircaloy-4 fuel cladding.
    Keywords: delayed hydride cracking (DHC), threshold stress intensity factor (K1н), DHC velocity, method, specimen, fuel cladding, load, displacement, crack.


    23.
    №5, 2015
    УДК 620.192.6
    COMPARATIVE ANALYSIS OF RESULTS THE AUTOMATED NONDESTRUCTIVE CONTROL
    Questions of accuracy determination areas of defects by automation process nondestructive control is very important, that be needed analysis process of scanning in point of view evaluation highest possible result nondestructive testing. In this article examine question calculation precision space artificial flaw by automatize ultrasonic flaw detection construction with noncontact passing method. To be execute theoretical calculation possible error flaw area by use scanning system. Showing experimental facts, complete estimate measurement inaccuracy. Execute critical evaluation of final result working data.
    Keywords: noncontact flaw detection, automation, precision flaw evaluation.


    24.
    №5, 2015
    УДК 621.787:539.319
    The computing-experimental method of surface hardened parts endurance limit prediction
    The possibility of cylindrical specimens made of steel 30ХГСА and D16-T alloy with circular cuts of 0,3 mm radius endurance limit prediction after outstripping superficial plastic deforming (hydro shot blasting) by the residual stresses (initial deformations) of reference specimens (bushes of 51,5/45 mm/mm diameter) hardened simultaneously with the smooth specimens has been examined using the computing-experimental method carried out by the authors. The difference between the compressive residual stresses calculated for the cut specimens by the initial deformations of reference specimens and the experimentally found ones doesn’t exceed 6%. Hardened specimens with the cuts endurance limit increases have been calculated using the average integral residual stresses criterion. It’s established that the values of the cut specimens endurance limit increase under bending in the case of symmetric cycle calculated using the carried out computing-experimental method differ from the experimental
    Keywords: surface hardening, endurance limit, reference specimen, initial deformations.


    25.
    №5, 2015
    УДК 621.45:629.76:620.49.
    Features of growth of cracks in the pipeline unloadings of the booster pump of fuel ZhRD
    It is shown that the fracture of pipelines occur on the fatigue mechanism. Finite element method of calculation of the SDC (stress deformation condition) pipeline under the influence of internal pressure was used. The mechanism of crack growth, and it is shown that the main cause of the fracture were of the dynamic stresses are high-level, dependent of the internal pressure and the size of oval tube bends in the pipeline. It was found that the conduit having a bend in the pipe ovality of not more than 0,4 mm has a grate resource when CT (control tests), of not less than 3600 s.
    Keywords: pipeline, ovality of pipeline, fatigue cracks, pressure impulses, cavitations wear.


    26.
    №5, 2015
    УДК 620.179.18:620.172.2
    Express mechanical characteristics control of aluminum alloys and their welds
    A new method of aluminum alloys and their welded joints mechanical properties determination is developed. The method is based on the instrumented indentation test with the registration of “load – displacement” curve during loading and unloading. This method allows to evaluate the yield stress, ultimate stress and ultimate uniform elongation of metal in local zones of welded joints as well as to find the weakest area in the joint. The experimental approbation of the proposed method on hardenable and non-hardenable aluminum alloys was realized.
    Keywords: aluminum alloys, mechanical characteristics, indentation diagrams.


    27.
    №3, 2015
    УДК 669.058
    N.I. Artemenko1, V.N. Simonov2, D.A. Aleksandrov1
  • [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
  • ASSESSMENT OF THE RELATIVE WEAR RESISTANCE OF ION-PLASMA FUSED COATINGS ON VT8 AND EP742 ALLOYS
    The paper presents test data on the wear resistance of coatings. The tests were conducted according to ASTM G99-05. The coatings were deposited by ion-plasma method on samples of alloys VT8 and EP742. Coating with high relative wear resistance were selected, the regularities of high adhesive strength of coatings were detected.
    Keywords: wear resistance testing, titanium alloys, ion-plasma method, plasma-chemical method.


    28.
    №3, 2015
    УДК 621.74.045
    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
  • THE ISSUES OF DEVELOPING MODEL COMPOSITIONS OF NEW GENERATION ON THE BASIS OF DOMESTIC MATERIALS FOR THE MANUFACTURE OF GAS TURBINE ENGINE BLADES
    Model compositions are widely used in manufacture of GTE details by investment casting. The analysis of contemporary issues, related to quality of models was reviewed and main branches of development of domestic model compositions of new generation, which aren’t inferior to foreign counterparts in properties, were determined.
    Keywords: investment casting, model compositions, wax, polymeric resin, terephtalic acid.


    29.
    №2, 2015
    УДК 621.763
    I.R. Aslanyan1, L.Sh. Shuster1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • EVALUATION OF COATINGS WEAR IN VARIOUS CONDITIONS OF FRICTION
    The application of electrolytic nickel-phosphorous coatings was consider. On the example of NiP coatings developed criteria that allowed a comparison of wear coatings under different conditions of friction: sliding, fretting and corrosion. The substantiation that the reverse friction pair comparison of wear coatings in different conditions of friction (continuous sliding, fretting and corrosion) should be carried out on the value of k, is proportional to the linear wear rate.
    Keywords: coating, friction, wear, slip, fretting wear, fretting corrosion.