2023, Rogozhkin, S. V., Ber, L. B., Khomich, A. A., Рогожкин, Сергей Васильевич

2021, Gribkov, V. A., Demina, E. V., Demin, A. S., Maslyaev, S. A., Rogozhkin, S. V., Рогожкин, Сергей Васильевич

© 2021, Pleiades Publishing, Ltd.Abstract: The effect of high-power pulsed fluxes of deuterium ions and deuterium plasma generated in the Plasma Focus PF-1000U device on oxide dispersion strengthened ferritic steel KP4-ODS (Fe–15 Cr–4 Al–2 W–0.35 Y2O3) was experimentally studied. When the samples were irradiated with two pulses (N = 2), the plasma flux power density was qpl ≈ 108 W/cm2 and that of ion beam qi × 109 W/cm2. At N = 9, qpl ≈ 2 ×108 W/cm2 and qi ≈ 5 × 109 W/cm2. The pulse duration of the plasma beams was τpl ≈ 100 ns and that of the ion beams τi ≈ 50 ns. It was shown that irradiation of the material in the soft mode (N = 2) leads to surface erosion due to evaporation of the material and is accompanied by the surface polishing effect. In this case, there is no significant change in the initial structural phase state of steel; only a small change in the crystal lattice parameters of solid solutions based on iron and chromium is observed. In the hard irradiation mode (N = 9), owing to the high heating of the surface layer, in addition to erosion, the material melts. In the structure of the surface layer of the ODS steel, a chromium-based solid solution disappears and only an iron-based solid solution remains, while the number of second-phase nanoparticles increases. The presence of a liquid phase formed upon exposure to fluxes of deuterium ions and deuterium plasma stimulates the possibility of complete dissolution of small (less than ~20 nm) nanoparticles of Y2O3 oxide and partial dissolution of larger (tens of nanometers) nanoparticles. Enhanced in comparison with the solid phase, the diffusion redistribution of elements in the molten surface layer contributes to the formation of Y2O3 nanoparticles and oxides of other elements that make up the ODS steel (Al2O3, Y–Al–O) upon cooling of the melt.

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

2020, Meshkov, E. A., Novoselov, I. I., Yanilkin, A. V., Khomich, A. A., Rogozhkin, S. V., Nikitin, A. A., Tarasov, B. A., Рогожкин, Сергей Васильевич, Никитин, Александр Александрович, Тарасов, Борис Александрович

© 2020, Pleiades Publishing, Ltd.Abstract: A comprehensive experimental–theoretical study of the processes of local ordering of multicomponent alloys has been carried out. Atom probe tomography and measurement of electrical resistance during isochronal annealing are used as experimental techniques. Atomistic modeling methods and the multiscale paradigm based on quantum mechanical calculations were used in the theoretical study. The experimental and theoretical approach used made it possible for the first time to detect the initial stage of decomposition of a CoCrFeNi alloy solid solution with the formation of Ni4Cr and Ni2Cr precipitates.

2025, Du, Z., Li, X., Zheng, M., Rogozhkin,S. V., Nikitin, A. A., Рогожкин, Сергей Васильевич, Никитин, Александр Александрович

2025, Margolin, B., Yurchenko, E., Morozov, А., Varovin, A., Rogozhkin, S., Nikitin, A., Рогожкин, Сергей Васильевич, Никитин, Александр Александрович

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

2021, Butov, N. A., Rudskoy, B. V., Akopyan, T. K., Lukyanchuk, A. A., Raznitsyn, O. A., Shutov, A. S., Aleev, A. A., Klauz, A. V., Rogozhkin, S. V., Лукьянчук, Антон Алексеевич, Разницын, Олег Анатольевич, Шутов, Антон Сергеевич, Алеев, Андрей Аскольдович, Клауз, Артём Вадимович, Рогожкин, Сергей Васильевич

© 2021, Pleiades Publishing, Ltd.Abstract: Atom probe tomography (APT) is a tool for detailed chemical composition analysis of advanced structural material nanostructure. The use of different Atomic Probe Tomography (APT) devices requires a certification of these setups prior to conducting research. In this paper a method of comparing APT setups in order to evaluate the influence of the overall system configuration on the accuracy of obtained data is proposed. The collected data comparison is presented for the aluminum alloy Al–3.3Cu–2.5Mn–0.5Zr and structural steel 16Kh12МVSFBR gathered on the APPLE-3D (“PAZL-3D”) setup and on the new ATLAS (“ATLAZ”) unit, created through upgrading the ECOTAP. Comparison of the results confirms the feasibility of carrying out research of the same material on similar setups without significant distortion of the data under its analysis and interpretation.

2025, Chen, L., Sun, L.-Y., Ji, P.-G., Xie, Y.-C., Rogozhkin, S. V., Iskandarov, N. A., Рогожкин, Сергей Васильевич, Искандаров, Насиб Амирхан-Оглы

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