Volume 12, Issue 4s, December 2022
Special Issue. Open School-Conference of NIS Countries "Ultrafine-Grained and Nanostructured Materials-2022": Selected Papers
The Open School-Conference of NIS Countries "Ultrafine-Grained and Nanostructured Materials-2022” (UFGNM - 2022) was held in Ufa, Russia, from October 3 till October 7, 2022. The school-conference gathered 156 researchers from different towns of Russia, among which 84 were young researchers, graduate and post-graduate students. 74 oral and 49 poster presentations were given at the conference. Two special oral sessions with the presentations of young researchers were held during the conference. A contest for the best oral and poster presentation of young researchers was also held and 7 winners of the contest were awarded a diploma. UFGNM 2022 was organized for the eighth time by the Institute for Metals Superplasticity Problems of the Russian Academy of Sciences in cooperation with Bashkir State University.
In this Special Issue, selected papers reported at UFGNM-2022 are published. All papers included here have passed the normal peer review and edition procedure accepted in the journal “Letters on Materials”. The Editorial Board expresses a gratitude to the authors presented their manuscripts and to the reviewers for a quick and careful analysis of the submitted papers.
Editor-in-Chief,
Radik R. Mulyukov
The single-step (low-temperature) homogenization of the Al alloy 1570C, recommended by the alloy developers, did not lead to the complete removal of chemical heterogeneity arising during crystallization. An additional high-temperature annealing step resulted in some reduction in the alloy strength, but was effective in eliminating the chemical heterogeneity of the cast structure and increasing corrosion resistance while maintaining the grain size and dispersity and coherency of the nanosized Al3(Sc,Zr) dispersoids present in the alloy.
E.V. Avtokratova, O.S. Sitdikov, R.R. Zagitov, M.V. Markushev
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 388-393
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The influence of warm plastic deformation by rolling at 600 and 900 °C with a total strain of e = 2 on the microstructure and mechanical properties of the reactor austenitic steel EK-164 has been studied. The resulting fragmented banded microstructure with a well-developed substructure and fine grains provides high strength properties.
S.A. Akkuzin, I.Y. Litovchenko, A.V. Kim, E.N. Moskvichev, V.M. Chernov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 394-398
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A new low-activation chromium-manganese austenitic steel for nuclear power engineering with an increased manganese content and additional alloying with strong carbide formers has been fabricated. The new steel has improved strength and ductility properties compared to known analogues.
I.Y. Litovchenko, S.A. Akkuzin, N.A. Polekhina, K.V. Almaeva, E.N. Moskvichev, A.V. Kim, V.V. Linnik, V.M. Chernov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 399-403
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Modeling of the structure and electronic properties was carried out from the first principles for the polymorphic varieties of graphene with adsorbed hydroxyl groups (hydroxygraphene), where basic graphene layer structure consisted exclusively of 4-8 paired topological defects.
M.E. Belenkov, V.A. Greshnyakov, V.M. Chernov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 404-408
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As a result of cryogenic deformation of Ni to 90%, a coarse fibered structure with a developed nanocellular substructure and extremely low amounts of dynamically recrystallized nanosized grains was formed.
M.V. Markushev, I.S. Valeev, E.V. Avtokratova, R.R. Ilyasov, A.K. Valeeva, S.V. Krimsky, O.S. Sitdikov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 409-413
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Microstructure of beta titanium alloy VT35 after different thermo-mechanical treatments.
E.V. Naydenkin, I.V. Ratochka, I.P. Mishin, O.N. Lykova, O.V. Zabudchenko
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 414-419
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Schematic representation of distribution of microhardness over the sample cross section depending on the annealing temperature.
R.R. Latypova, D.B. Kabirova, N.F. Khayretdinov, R.F. Fazlyakhmetov, M.F. Imayev
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 420-423
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Diagrams true stress-strain for: artificial aging (AA) and ultrafine-grained (UFG) state of 6101 alloy
D.V. Gunderov, S.D. Gunderova, D.K. Magomedova
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 424-427
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Low-heat input friction stir welding/processing of Cu-Cr-Zr alloy produces an ultrafine-grained structure reinforced with Cr and Cu5Zr nanoparticles, resulting in a hardness level of 150-190 HV1.
N.V. Lezhnin, A.V. Makarov, E.G. Volkova, A.I. Valiullin, A.B. Kotelnikov, A.A. Vopneruk
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 428-432
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Structures of a thin-film high-entropy alloy deposited on steel AISI 321.
Y.F. Ivanov, V.V. Shugurov, E.A. Petrikova, N.A. Prokopenko, A.D. Teresov, O.S. Tolkachev
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 433-438
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The process of superplastic forming into a cylindrical matrix of workpieces from the EK61 superalloy with an ultrafine-grained structure has been studied.
R.V. Safiullin, V.A. Valitov, R.Y. Lutfullin, E.V. Galieva, E.Y. Klassman
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 439-444
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Gravimetric density as the function of exposure time at two temperatures and pressure. The inset shows the initial structure of a crumpled graphene flake (gray atoms) in a hydrogen atmosphere (blue atoms).
N.G. Apkadirova, K.A. Krylova, J.A. Baimova
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 445-450
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The features and fracture mechanisms of reactor low-activation ferritic-martensitic steel EK-181 after high-temperature thermomechanical treatment and traditional heat treatment are revealed depending on the impact test temperature in the range from -186 to 100°C. The fracture appearance transition temperature is determined by a fractographic investigation.
N.A. Polekhina, V.V. Linnik, I.Y. Litovchenko, K.V. Almaeva, V.M. Chernov, M.V. Leontieva-Smirnova
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 451-456
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Microstructure of HIP superalloy and after subsequent hot deformation.
S.K. Mukhtarov, D.A. Karyagin, A.V. Logunov, A.A. Ganeev, R.I. Zainullin, R.V. Shakhov, V.M. Imayev
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 457-462
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HPT at 6 GPa pressure in the range of 0-10 rotations of pre-quenched ingot of the commercial aluminum alloy 1965 resulted in consequential transformation of well-defined dense dislocation wall/cell structure to non-equilibrium nanofragmented one and near two-fold hardenning. The alloy strengthening and/or softening during further natural aging up to 500 hrs were within 10-15% and controlled by simultaneous decomposition of the aluminum solid solution and recovery of its deformation structure.
M.V. Markushev, E.V. Avtokratova, S.V. Krymskiy, V.V. Tereshkin, O.S. Sitdikov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 463-468
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At room temperature the permittivity and dielectric loss tangent of Bi2-1/3Cr1/6Mn1/6Fe1/6Co1/6Ni1/6Cu1/6Ta2O9+Δ are ~46 and ~0.004 at 1 MHz, respectively.
K.N. Parshukova, N.A. Sekushin, B.A. Makeev, M.G. Krzhizhanovskaya, A.V. Koroleva, N.A. Zhuk
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 469-474
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A new method for obtaining magnetic Fe-Mn-O nanoparticles by electric arc sputtering followed by calcination is proposed. It is shown that the obtained nanoparticles have high thermal stability.
D.V. Smovzh, M.S. Skirda, S.Z. Sakhapov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 475-479
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Experimental refinement of monophase state regions on the phase diagrams parts of FePt and CoPt alloys
N.S. Zakharov, I.N. Tikhonova, Y.A. Zakharov, A.N. Popova, V.M. Pugachev, D.M. Russakov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 480-485
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The study of the process of phase formation of multicomponent pyrochlore (Bi2-хCr1/6Mn1/6Fe1/6Co1/6Ni1/6Cu1/6Ta2O9+Δ) in the course of solid-phase synthesis showed that the precursor of the pyrochlore phase is bismuth orthotantalate. Of all the precursors, cobalt and nickel oxides are the last to enter the chemical reaction (at 850-900 С). Intermediate phases in the course of synthesis are complex oxides Bi16CrO27, Bi25FeO40, BiTaO4, Bi3TaO7, СoTa2O6.
E.P. Rylchenko, B.A. Makeev, D.V. Sivkov, R.I. Korolev, N.A. Zhuk
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 486-492
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Diagrams "Torque - angle of twist" (a, b) and "Fatigue kinetic diagrams" (c, d) of materials for medical applications. 1- СG materials; 2, 3 - UFG materials (2- ECAP-C; 3- ECAP-C +D)
G.V. Klevtsov, R.Z. Valiev, M.V. Fesenyuk, N.A. Klevtsova, M.N. Tyurkov, A.A. Matchin, E.V. Nosov
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 493-498
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Schematic illustration of impact specimen cutting from multilayer laminate in the crack divider orientation
A.A. Sarkeeva
Year: 2022
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Volume: 12
Issue: 4s
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Pages: 499-503
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