Moscow, Russia


Moscow, Russia
Time filter
Source Type

Klochkov G.G.,FGUP VIAM | Grushko O.E.,FGUP VIAM | Ovsyannikov B.V.,KUMZ Company | Popov V.I.,FGUP VIAM
Metal Science and Heat Treatment | Year: 2015

Production of ingots and commercial-size sheets from an Al-Mg-Si-base alloy V-1341 with calcium addition is described. Their structure, phase composition and mechanical properties are studied. It is shown that calcium enters primarily phases Alx-SiyCa and Alx SiyMgzCa of variable composition. © 2015 Springer Science + Business Media New York.

Shamrai V.F.,RAS Institute of Metallurgy | Klochkova Y.Y.,FGUP VIAM | Lazarev E.M.,RAS Institute of Metallurgy | Gordeev A.S.,RAS Institute of Metallurgy | Sirotinkin V.P.,RAS Institute of Metallurgy
Russian Metallurgy (Metally) | Year: 2013

The texture and microstructure of the central layers in alloy 1469 sheets and the orientations of hardening T1-phase precipitates are studied by X-ray diffraction, optical microscopy, and transmission electron microscopy. These studies and X-ray diffraction performed in asymmetric geometry demonstrate that the texture of the material is formed by the broadening of the orientations located near a β skeleton line. The contribution to an X-ray diffraction pattern from two of the four possible versions of the orientations of hardening T1-phase plates that are caused by a brass-type texture component in the matrix and the orientation relationships between the matrix and the T1-phase lattices is separated. The microstructure of the sheets is shown to have a two-level character. It is formed by extended (up to several millimeters long) regions fragmented into grains several microns in size. The structural states of the sheet material are discussed in their relation to the crystallographic character of fatigue crack propagation. © 2013 Pleiades Publishing, Ltd.

Belyaev M.S.,FGUP VIAM | Terent'ev V.F.,RAS Institute of Metallurgy | Bakradze M.M.,FGUP VIAM | Gorbovets M.A.,FGUP VIAM | Gol'dberg M.A.,RAS Institute of Metallurgy
Russian Metallurgy (Metally) | Year: 2015

The low-cycle fatigue of a VZh175 nickel superalloy is studied under conditions of complete deformation per loading cycle at an initial cycle asymmetry R = 0, a deformation amplitude ɛa = 0.4–0.6%, and a temperature of 20 and 650°C. The specific features of cyclic hardening/softening of the alloy under these conditions are detected. The mechanisms of fatigue crack nucleation and growth are analyzed as functions of the deformation amplitude and the test temperature. © 2015, Pleiades Publishing, Ltd.

Aleshin N.P.,Moscow State Technical University | Murashov V.V.,FGUP VIAM | Evgenov A.G.,FGUP VIAM | Grigoriev M.V.,Moscow State Technical University | And 3 more authors.
Russian Journal of Nondestructive Testing | Year: 2016

Flaws in metal parts that are typical for the selective laser melting technique are considered. The flaws are divided into four groups by the degree of their danger. The quantitative and qualitative indices of the flaws are given and the causes of their formation are described. © 2016, Pleiades Publishing, Ltd.

Antipov V.V.,FGUP VIAM | Kolobnev N.I.,FGUP VIAM | Khokhlatova L.B.,FGUP VIAM
Metal Science and Heat Treatment | Year: 2014

Third-generation aluminum alloys 1441, 1424 and V-1461, V-1469 of medium and high strength, respectively, which have been developed as an alternative to the base aluminum alloys 1163 and V95 widely used in the aircraft industry, are studied. The advantages of the suggested alloys with respect to the strength, life characteristics, weldability and corrosion resistance are shown. © 2014 Springer Science+Business Media New York.

Lukina E.A.,FGUP VIAM | Alekseev A.A.,FGUP VIAM | Khokhlatova L.B.,FGUP VIAM | Oglodkov M.S.,FGUP VIAM
Metal Science and Heat Treatment | Year: 2014

Phase transformations in aluminum alloys 1424 and V-1461 are investigated. Special features of the structure of the δ′-phase in the initial stages of aging of alloy 1424 are determined with the help of x-ray diffraction analysis and transmission electron microscopy. The earlier plotted diagram of aging-induced phase transformations (AIPT) of alloy 1424 is amended. The temperature and time ranges of the existence of the phases are determined and an AIPT diagram is plotted for alloy V-1461. It is shown that the maximum strength properties of alloy V-1461 are implemented in phase domains (δ′ + θ′ + {T'1} + S′) and (δ′ + {{T'1} + S′). This makes it possible to obtain various phase compositions corresponding to the required combination of properties and substantiates the use of multistage aging modes. © 2014 Springer Science+Business Media New York.

Zhegina I.P.,FGUP VIAM | Morozova L.V.,FGUP VIAM
Metal Science and Heat Treatment | Year: 2014

Fracture surfaces of aluminum alloys VAD23, AK6, V95, 01911, 1420, 1430, 1440, 1451 are studied after different variants of aging. Common features of formation of fractures are determined depending on the modes of heat treatment, conditions of deformation and presence of impurities in the aluminum alloys. Efficiency of the use of fractography for estimating the working capacity of the aluminum alloys is demonstrated. © 2014 Springer Science+Business Media New York.

Results of a study of regular features of formation of phase composition and of evolution of the structure and phase composition of an alloy of the Mg - Zn - Zr - Y system in cast, deformed and heat treated states are presented. It is established that the primary intermetallic phases are preserved in the alloy after deformation and heat treatment. Yttrium is shown to be an active phase-forming element just like zirconium. It is proved that the atoms of admixtures (such as H, N and O) in the Mg - Zn - Zr - Y alloy participate in the formation of the phase composition. The low anisotropy of the main mechanical properties of extruded bars from the alloy is explained. © 2014 Springer Science+Business Media New York.

Shestov V.V.,FGUP VIAM | Antipov V.V.,FGUP VIAM | Senatorova O.G.,FGUP VIAM | Sidel'nikov V.V.,FGUP VIAM
Metal Science and Heat Treatment | Year: 2014

The structure, composition and set of properties of specimens and components, and some parameters of the process of production of a promising FML class of metallic polymers based on sheets of high-modulus (E ∼ 79 GPa) alloy 1441 with reduced density (d ∼2.6 g/cm3) and an optimized glued prepreg reinforced with fibers of high-strength high-modulus VMPglass are described. Results of fire and fatigue tests of a promising 1441-SIAL structural laminate are presented. © 2014 Springer Science+Business Media New York.

Sidorov V.V.,FGUP VIAM | Iskhodzhanova I.V.,FGUP VIAM | Rigin V.E.,FGUP VIAM | Folomeikin Y.I.,FGUP VIAM
Russian Metallurgy (Metally) | Year: 2012

The use of a cellular ceramic filter is shown to be effective for casting nickel superalloys in vacuum, including superalloys cast using wastes. As a result of filtration, the volume fraction of nonmetallic inclusions and their sizes and quantity in a metal decrease. © 2012 Pleiades Publishing, Ltd.

Loading FGUP VIAM collaborators
Loading FGUP VIAM collaborators