Last Number

№3-4  2017
1.
УДК 669.017.165
Influence of microadditives of transition metals and silver on properties sheets from Al–Cu–Mg system alloys
The state-of-the-art review of deformable aluminum alloys of Al–Cu–Mg system is carried out. Microalloying influence by additives of transition metals (Sc, Zr) and silver of sheet semi-finished products from sredneprochny alloys on the basis of Al–Cu–Mg system is investigated. Alloys with different ratio of Cu/Mg are considered. Mechanical properties, fatigue and fracture toughness characteristics are defined at the room temperature. The positive effect of use of complex microalloying by transition metals (Sc, Zr) and Ag is shown.
Keywords: structure, properties, sheets, Al–Cu–Mg, silver, transitional elements.


2.
УДК 621.318.1
Shubakov V.S.2, Zukov D.G.2
  • [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.


    3.
    УДК 621.318.1
    Aydullov R.N.2, Burkanov M.V.1, Shubakov V.S.3, Zukov D.G.3
  • [2] Bauman Moscow State Technical University
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • [3] National University of Science and Technology MISiS
  • Research of influence heat treatment duration on temperature stability of permanent magnets alloy YuNDK35T5А
    Optimum temperature isothermal thermomagnetic treatment of YuNDK35T5А alloys is established. The research of influence heat treatment duration on magnetic properties and temperature stability of material is conducted. It is established, that magnetic properties of the samples, processed at optimum temperature of thermomagnetic treatment don’t change at en-durance, however magnetic properties of the samples processed at non-optimal temperature continue to grow with increase in time of process. It is show that values of temperature coefficient of induction at endurance of 550°С, 100 hours can decrease to 30%. By method of the transaction electron-microscopy it is established that in the heat treatment process the volume fraction of high magnetic particles is changes, that gives the chance to regulate temperature co-efficient of induction in YuNDK35T5А alloy.
    Keywords: magnetic properties, high coercive station, temperature coefficient of induction, heat treatment.


    4.
    УДК 621.74.045
    L.I. Rassohina1, 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.


    5.
    УДК 678.7
    Kovalenko A.V.1, Tundaikin K.O.1, Parahin I.V.1, Lukinа A.I.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • The phenolic-rubber foam is not corrosive to non-ferrous metals
    The possibilities of receiving flexible phenolic-rubber foams, having not activity in relation to non-ferrous metals are considered. The influence of novolak oligomer on kinetics of curing resol oligomer with heating to temperature of 150°C is studied. The possibility of mixing between resol and novolac oligomers is shown. The complex of technological and operational properties phenolic-rubber foams, contains resol oligomer (FrK) is studied. Work is executed within implementation of the complex scientific direction 16.1. «Polymeric syntactic materials and foams» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)
    Keywords: phenolic oligomer, combination, rubber, foam materials, composite materials, technology.


    6.
    УДК 665.939.5
    Petrova A.P.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Influence of сarborane groups on curing processes of carborane-containing adhesives of different chemical nature. Part 1. Curing of adhesive on the basis of phenolformaldehyde oligomers
    Mechanisms of curing of glues as a part of which carboranconteining components are used are considered. Curing processes in carboranconteined phenolic and rubber and phenolic and organic silicon adhesives are investigated. Researches carried out using methods IR spectroscopy, TGA and on change of the maintenance of soluble fraction in hardened compositions. Influence of structure of carborane groups on curing processes is shown. It is shown that carborane groups make essential impact on the speed of processes of thermochemical transformations when curing adhesives, shifting them in area of more high temperatures.
    Keywords: phenolformaldehyde oligomers, carboranes, adhesive, curing, IR spectrum, TGA, durability of adhesived joints, thermomechanical characteristics, dilatometry, x-ray diffraction analysis, diffractogram.


    7.
    category: Composite materials
    УДК 678.8
    Doriomedov M.S.1, A.V. Hrulkov1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • The use of pultrusion for receiving structural elements from composite materials
    Currently abroad in the manufacture of structural elements of aircrafttional techniques use polymer composite materials, fabrication provided by pultrusion technology. A distinctive feature of this technology lies in the fact that the source component is of continuous filaments applied prepreg. The use of prepregs in the manufacture of elements of aviation constructions allows to reduce the complexity of manufacturing, including to improve the quality of the final product. Additionally, the porosity of the products does not exceed 1%, subject to the existing requirements meets the aircraft requirements.
    Keywords: polymer composites, pultrusion, prepreg.


    8.
    category: Testing of materials and structures
    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.


    9.
    category: Composite materials
    УДК 687.8:66.047.76
    Doriomedov M.S.1, Zhelezina G.F.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • Russian aramic filler market
    The article is devoted to the review of the Russian market of aramid fibers, as well as their use for the manufacture of products for various purposes and as reinforcing fillers of polymer composite materials. The properties of Russian and foreign aramid fibers are compared. The main producers and consumers of aramid fibers are presented, the estimated volumes of production
    Keywords: аramid fibers, organoplastics, reinforcing fillers.