Том 12, Выпуск 4s, Декабрь 2022

Специальный выпуск. Открытая школа-конференция стран СНГ "Ультрамелкозернистые и наноструктурные материалы - 2022": избранные статьи

Предисловие

    Перейти к содержанию
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.

Effect of homogenization on the structure, hardness and corrosion resistance of 1570C alloy

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 388-393
Раздел: Получение и анализ структуры материалов
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.

Microstructure and mechanical properties of austenitic steel EK-164 after warm rolling

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 394-398
Раздел: Получение и анализ структуры материалов
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.

New low-activation austenitic steel for nuclear power engineering

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 399-403
Раздел: Получение и анализ структуры материалов
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.

Modeling the structure and electronic properties of new polymorphic L4-8 hydroxygraphene varieties

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 404-408
Раздел: Теория и компьютерное моделирование в материаловедении и в физике конденсированного состояния
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.

Effect of strain of cryorolling on structure and strength of nickel

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 409-413
Раздел: Механические и физические свойства материалов
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.

Realizing ultrafine grain structure of Cu-Cr-Zr alloy via friction stir welding / processing

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 428-432
Раздел: Получение и анализ структуры материалов
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).

Effect of external pressure on the hydrogen storage capacity of a graphene flake: molecular dynamics

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 445-450
Раздел: Теория и компьютерное моделирование в материаловедении и в физике конденсированного состояния
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.

Fracture features of impact samples of low-activation ferritic-martensitic steel EK-181 after high-temperature thermomechanical treatment

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 451-456
Раздел: Получение и анализ структуры материалов
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.

Effect of HPT straining and further natural aging on the structure and hardness of aluminum alloy 1965 with nanosized TM aluminides

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 463-468
Раздел: Получение и анализ структуры материалов
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.

Synthesis and dielectric properties, XPS spectroscopy study of high-entropy pyrochlore

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 469-474
Раздел: Экспериментальные методы исследования материалов
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.

Features of phase formation of pyrochlore-type Bi2Cr1/6Mn1/6Fe1/6Co1/6Ni1/6Cu1/6Ta2O9+Δ

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 486-492
Раздел: Экспериментальные методы исследования материалов
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)

Strength and fracture mechanism of nanostructured metal materials for medical applications

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
PDF PDF  Статья
Год: 2022 Том: 12     Выпуск: 4s Стр.: 493-498
Раздел: Механические и физические свойства материалов
Glezer
От редакции: Памяти Глезера Александра Марковича (1946-2022)