Персона:
Богачев, Алексей Александрович

Организационные подразделения

Организационная единица

Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.

Фамилия

Богачев

Имя

Алексей Александрович

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Теперь показываю 1 - 10 из 18

Только метаданные
Nanostructure Evolution of Oxide Dispersion Strengthened Steels under Fe Ion Irradiation at 350°C
(2020) Khomich, A. A.; Khoroshilov, V. V.; Kulevoy, T. V.; Fedin, P. A.; Rogozhkin, S. V.; Bogachev, A. А.; Nikitin, A. A.; Zaluzhnyi, A. G.; Рогожкин, Сергей Васильевич; Богачев, Алексей Александрович; Никитин, Александр Александрович; Залужный, Александр Георгиевич
© 2020, Pleiades Publishing, Ltd.Abstract: Improved mechanical properties of oxide dispersion strengthened (ODS) steels, the advanced materials for the reactor core, are due to the high density of uniformly distributed nanosized oxide inclusions. Transformation of the nanostructure of ODS steels under irradiation determines their stability during operation in the reactor conditions. In this work, three ODS steels are studied: Eurofer ODS, 10Cr ODS, and KP-3 ODS with different alloying systems. In these steels, the chromium content varies from 9 to 14 at %; such alloying elements as V, Ti, Al, W, and Mn are present in different proportions. The effect of irradiation with iron ions up to 3, 6, and 30 dpa at a temperature of 350°C was studied. The radiation-induced changes were analyzed by transmission electron microscopy and atom probe tomography. Although the sizes of oxide inclusions remained almost without change under irradiation, a decrease in their number density was observed in 10Cr ODS and KP-3 ODS steels, while the number density of oxides in Eurofer ODS steel did not change under the irradiation to 30 dpa. On the whole, the strengthening of the ODS steels due to inclusions during the irradiation to 30 dpa at 350°C changed insignificantly, which indicates their radiation resistance and their low propensity for low-temperature radiation strengthening and embrittlement.
Только метаданные
Study of Microscopic Origins of Radiation Hardening of Eurofer 97 in Simulation Experiment with Ion Irradiation
(2019) Khomich, A. A.; Iskandarov, N. A.; Khoroshilov, V. V.; Lukyanchuk, A. A.; Rogozhkin, S. V.; Nikitin, A. A.; Bogachev, A. A.; Рогожкин, Сергей Васильевич; Никитин, Александр Александрович; Богачев, Алексей Александрович
© 2019, Pleiades Publishing, Ltd.Abstract: Low-temperature radiation hardening of prospective structural steel Eurofer 97 as the material for the first wall of the DEMO fusion reactor is studied in this work. Specimens of Eurofer 97 steel were irradiated with Fe ions up to 10 dpa at temperatures of 250, 300 and 400°C. Irradiated samples were studied by transmission electron microscopy and atom probe tomography. TEM study of irradiated samples showed preferential formation of dislocation loops at all temperatures of irradiation. Pair-correlation function analysis detected the initial stage of matrix solid solution decomposition of Eurofer 97 steel only at the temperature of 400°C. Detected microscopic changes and calculated hardening in the framework of the DBH (dispersed barrier hardening) model have shown that formation of dislocation loops is the main origin of low temperature radiation hardening of Eurofer 97 under irradiation with Fe ions with fluence up to 10 dpa.
Только метаданные
Comprehensive Analysis of Nanostructure of Oxide Dispersion Strengthened Steels as Prospective Materials for Nuclear Reactors
(2020) Khomich, A. A.; Lukyanchuk, A. A.; Raznitsyn, O. A.; Shutov, A. S.; Rogozhkin, S. V.; Bogachev, A. А.; Nikitin, A. A.; Рогожкин, Сергей Васильевич; Богачев, Алексей Александрович; Никитин, Александр Александрович
© 2020, Pleiades Publishing, Ltd.Abstract: The enhanced mechanical properties of oxide dispersion-strengthened (ODS) steels are mainly due to the high density of homogeneously distributed oxide inclusions. It is well known that some alloying elements, such as Ti, V, and Al, play an important role in the formation of oxides/nanoclusters and influence the density and size of these inclusions. In this paper, a wide range of ODS steels containing different alloying elements were studied. The microstructural analysis was performed using transmission electron microscopy and atom probe tomography. Different types of inclusions were found in the steels: oxides of the Y–Ti–O or Y–Al–O types with sizes of ~2–15 nm, and nanoclusters (2–5 nm) enriched in Y, O, and Cr, as well as Ti, V, and Al, when these elements were present in the material. It was shown that oxides made the main contribution to the steel strengthening, while the cluster contribution was comparable with that of oxides only in Austenitic ODS and 14Cr ODS steels.
Только метаданные
Nanostructure of Oxide Dispersion-Strengthened Steel Mechanically Alloyed with Intermetallic Fe3Y
(2024) Rogozhkin, S. V.; Klauz, A. V.; Nikitin, A. A.; Khalyavina, A. A.; Raznitsyn, O. A.; Bogachev, A. А.; Iskandarov, N. A.; Zaluzhny, A. G.; Рогожкин, Сергей Васильевич; Клауз, Артём Вадимович; Никитин, Александр Александрович; Халявина, Алена Андреевна; Разницын, Олег Анатольевич; Богачев, Алексей Александрович; Искандаров, Насиб Амирхан-Оглы; Залужный, Александр Георгиевич
Только метаданные
Study of Nanostructures in High-Chromium Oxide Dispersion-Strengthened Steels
(2023) Rogozhkin, S. V.; Klauz, A. V.; Khomich, A. A.; Bogachev, A. А.; Nikitin, A. A.; Lukyanchuk, A. A.; Raznitsyn, O. A.; Shutov, A. S.; Zaluzhnyi, A. G.; Рогожкин, Сергей Васильевич; Клауз, Артём Вадимович; Богачев, Алексей Александрович; Никитин, Александр Александрович; Лукьянчук, Антон Алексеевич; Разницын, Олег Анатольевич; Шутов, Антон Сергеевич; Залужный, Александр Георгиевич
Только метаданные
A Study of the Effect of Magnetic Scattering on the Analysis of the Nanostructure of Oxide Dispersion-Strengthened Steels by Small-Angle Neutron Scattering
(2024) Rogozhkin, S. V.; Klauz, A. V.; Khomich, A. A.; Bogachev, A. А.; Nikitin, A. A.; Рогожкин, Сергей Васильевич; Клауз, Артём Вадимович; Богачев, Алексей Александрович; Никитин, Александр Александрович
Только метаданные
Comprehensive Analysis of Nanostructure of Oxide Dispersion-Strengthened Steels by Ultramicroscopy Methods
(2022) Rogozhkin, S. V.; Khomich, A. A.; Klauz, A. V.; Bogachev, A. А.; Nikitin, A. А.; Lukyanchuk, A. A.; Raznitsyn, O. A.; Shutov, A. S.; Zaluzhny, A. G.; Рогожкин, Сергей Васильевич; Клауз, Артём Вадимович; Богачев, Алексей Александрович; Никитин, Александр Александрович; Лукьянчук, Антон Алексеевич; Разницын, Олег Анатольевич; Шутов, Антон Сергеевич; Залужный, Александр Георгиевич
Abstract: The characterization of the nanostructure of modern oxide dispersion strengthened steels requires a comprehensive analysis using complementary techniques. In this work, the methods of small-angle X-ray scattering, transmission electron microscopy and atom probe tomography have been applied to several oxide dispersion strengthened steels. Comparison of the obtained results allows the most correct characterization of inclusion types and their number in the studied materials. It is shown that most of the studied steels contain oxide inclusions and nanosized clusters enriched in O and Y, as well as V, Ti, Al, and Zr, depending on the initial steel composition. Transmission electron microscopy and atom probe tomography provide detailed information about the inclusion types, and small-angle X-ray scattering gives the most accurate estimation of the average density of inclusions in large volumes of material. The importance of the correct determination of the inclusion types for hardening calculations is shown, the results of such calculations are compared with microhardness measurements. The calculated values of hardness for the studied steels are in the range 2.7–4.3 GPa, which is well confirmed by microhardness measurements. © 2022, Pleiades Publishing, Ltd.
Только метаданные
Study of the Effect of Thermal Aging on the Nanostructure of Oxide Dispersion-Strengthened Steels by Small-Angle X-Ray Scattering
(2024) Rogozhkin, S. V.; Klauz, A. V.; Gorshkova, Yu. E.; Bokuchava, G. D.; Khomich, A. A.; Bogachev, A. А.; Nikitin, A. A.; Zaluzhny, A. G.; Рогожкин, Сергей Васильевич; Клауз, Артём Вадимович; Богачев, Алексей Александрович; Никитин, Александр Александрович; Залужный, Александр Георгиевич
Только метаданные
Emulation of Radiation Damage of Structural Materials for Fission and Fusion Power Plants Using Heavy Ion Beams
(2019) Khomich, A. A.; Iskandarov, N. A.; Khoroshilov, V. V.; Lukyanchuk, A. A.; Rogozhkin, S. V.; Nikitin, A.; Bogachev, A. А.; Рогожкин, Сергей Васильевич; Никитин, Александр Александрович; Богачев, Алексей Александрович
© 2019, Pleiades Publishing, Ltd.The study is devoted to the methodology of simulation experiments for the analysis of radiation damage of structural materials of nuclear power plants by irradiation with heavy ions and subsequent analysis with use of the ultramicroscopy and nanoindentation methods. Details of the irradiation experiments in the TIPr accelerator (Institute for Theoretical and Experimental Physics) with ion energy of 101 keV/nucleon are given. Current approaches to the analysis of radiation-induced changes in the structural phase state of samples irradiated with ions with use of transmission electron microscopy and atom probe tomography are demonstrated. Models for the evaluation of radiation hardening based on microscopic changes, as well as the capabilities of the nanoindentation method for direct measurement of the hardening of a specimen layer irradiated by ions, are considered.
Только метаданные
Study of the Nanostructure of Oxide Dispersion-Strengthened Steels with Small-Angle Neutron Scattering
(2023) Rogozhkin, S. V.; Klauz, A. V.; Khomich, A. A.; Bogachev, A. А.; Nikitin, A. A.; Рогожкин, Сергей Васильевич; Клауз, Артём Вадимович; Богачев, Алексей Александрович; Никитин, Александр Александрович