Научная группа: Лаборатория технологического цикла создания материалов (Кафедра №9 ИЯФиТ)
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Experimental and numerical analysis of filler metal STEMET 1301A for connection of molybdenum with steel 12CR18NI10TI (Withdrawal of Vol 295, art no 116683, 2020)
(2021) Lublinsky, I. E.; Sevryukov, O. N.; Vertkov, A. V.; Ivannikov, А. A.; Penyaz, M. A.; Fedotov, I. V.; Peklich, A. S.; Abramov, E. R.; Севрюков, Олег Николаевич; Иванников, Александр Александрович; Федотов, Иван Владимирович
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal .
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Formation of structure of TiNiCu alloys with high copper content upon producing by planar flow casting
(2020) Shelyakov, A. V.; Sevryukov, O. N.; Sitnikov, N. N.; Borodako, K. A.; Khabibullina, I. A.; Шеляков, Александр Васильевич; Севрюков, Олег Николаевич; Ситников, Николай Николаевич; Бородако, Кирилл Анатольевич
© Published under licence by IOP Publishing Ltd.The rapidly quenched alloys of the quasibinary intermetallic TiNi-TiCu system with a high copper content (more than 25 at.%) are of great interest as shape memory materials due to the possibility of a significant decrease in the temperature and deformation hysteresis in comparison with the binary TiNi alloy. To obtain alloys with a copper content of 25 to 40 at.%, the planar flow casting technique was used. The alloys were fabricated at a melt cooling rate of about 106 K/s in the form of ribbons 30-50 µm thick and wide in the range from 7 to 20 mm. The study of the structure of the alloys was carried out using X-ray diffraction analysis, scanning and transmission electron microscopy. It was shown that from the ribbon side, contacting the quenching wheel, all alloys are amorphous, while on the non-contact side of the ribbons of alloys with 25 and 30 at.% Cu, a thin surface crystalline layer with a B2 structure is observed. Using energy dispersive X-ray spectroscopy, it was found that the content of the alloy components in the amorphous and crystalline phases coincides.
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Brazing of ZTA ceramic with titanium for biomedical application
(2024) Fedotov, I.; Ivannikov, А.; Terekhova, S.; Dzhumaev, P.; Kozlov, I.; Klyushin, I.; Sevryukov, O.; Федотов, Иван Владимирович; Иванников, Александр Александрович; Терехова, Софья Михайловна; Джумаев, Павел Сергеевич; Козлов, Илья Владимирович; Клюшин, Иван Игоревич; Севрюков, Олег Николаевич
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Joining Stainless-Steel AISI 304 and High-Strength Aluminum Alloy AA 6082 by Brazing Using Al-Ge-Si Foils
(2023) Ivannikov, А.; Abramov, A.; Popov, N.; Penyaz, M.; Suchkov, A.; Pukhareva, N.; Sevryukov, O.; Иванников, Александр Александрович; Абрамов, Антон Владиславович; Попов, Никита Сергеевич; Сучков, Алексей Николаевич; Пухарева, Наталья Алексеевна; Севрюков, Олег Николаевич
An Al-40.0Ge-3.4Si wt.% alloy foil with a thickness of 50 ± 5 μm, obtained via an ultrafast solidification method, is described in this work. A complete wetting of the aluminum alloy substrate with a wetting angle of 0° is observed, and the formation of a drop with a wetting angle of 30 ± 5° is observed on the steel substrate. Similar and dissimilar brazed joints of aluminum alloy AA 6082 and stainless-steel AISI 304 are obtained. The microstructure of the AA 6082/AA 6082 brazed seam is homogeneous and contains particles of an Al7Fe2Si system intermetallic compound and particles of an Al-Ge eutectic composition. The brazed seam of the AISI 304/AISI 304 joint is formed due to the formation of the Al8Fe2(Si, Cr) intermetallic compound reaction layer on the steel surface. The proposed scheme for the AISI 304/AA 6082 brazed joint formation is given. The brazed seam represents the Al8Fe2(Si, Cr) reaction layer on the steel surface, the thickness of which depends on the holding time during brazing, and the aluminum matrix of which has particles of a composition close to an Al-Ge eutectic. The obtained results could be used for the optimization of time–temperature brazing modes in order to improve the mechanical characteristics of AISI 304/AA 6082 dissimilar joints.
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Joining tungsten with steel for DEMO: Simultaneous brazing by Cu-Ti amorphous foils and heat treatment
(2021) Svetogorov, R.; Bachurina, D.; Suchkov, A.; Gurova, J.; Savelyev, M.; Dzhumaev, P.; Kozlov, I.; Leont'eva-Smirnova, M.; Sevryukov, O.; Сучков, Алексей Николаевич; Гурова, Юлия Александровна; Савельев, Максим Дмитриевич; Джумаев, Павел Сергеевич; Козлов, Илья Владимирович; Леонтьева-Смирнова, Мария Владимировна; Севрюков, Олег Николаевич
© 2020Development of a reliable technology to join tungsten with steel is essential for DEMO application; however, it is difficult due to large differences in their physical properties. To solve this problem, high-temperature brazing was carried out. Cu-Ti brazing alloys, which were rapidly solidified into foil, were used together with a compensating vanadium interlayer, so the EK-181 steel/Cu-28Ti/V/Cu-50Ti/W and EK-181/Cu-50Ti/V/Cu-50Ti/W brazed joints were obtained. The microstructures of the seams were investigated by optical microscopy, SEM (EDX, EBSD) and synchrotron XRD. Thermocycling and shear strength tests showed that Cu-28Ti wt. % brazing alloy ensures a firmer joint compared to Cu-50Ti wt. %. The Cu-28Ti wt. % brazing alloy was used to perform high-temperature brazing in the brazing mode equivalent to traditional EK-181 steel heat treatment. It showed that every step of the heat treatment affected the microstructures and the shear strength.
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Институт ядерной физики и технологий
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.
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Направления исследований:
-Исследования активных и тугоплавких металлов
Получение и исследование структуры и свойств аморфных и нанокристаллических быстрозакаленных металлических сплавов активных и тугоплавких металлов
-Пайка материалов
Высокотемпературная пайка материалов, включая соединения разнородных материалов, анализ структурно-фазового состояния паяных соединений
-Разработка новых материалов
Разработка новых конструкционных и функциональных материалов с использованием прогрессивного метода сверхбыстрой закалки расплава
-Аддитивные и нанотехнологии
Исследования в области аддитивных и нанотехнологий
-Получение объемных металлических стёкол (аморфных сплавов)