Персона: Фесенко, Владимир Александрович
Загружается...
Email Address
Birth Date
Научные группы
Организационные подразделения
Организационная единица
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.
Статус
Фамилия
Фесенко
Имя
Владимир Александрович
Имя
5 results
Результаты поиска
Теперь показываю 1 - 5 из 5
- ПубликацияОткрытый доступRecrystallization of cladding tubes from Zr-based alloys for nuclear reactors(2019) Isaenkova, M. G.; Perlovich, Yu. A.; Fesenko, V. A.; Krymskaya, O. A.; Исаенкова, Маргарита Геннадьевна; Фесенко, Владимир Александрович; Крымская, Ольга Александровна© 2019 Published under licence by IOP Publishing Ltd.This paper is devoted to the regularities of change in the crystallographic texture and the structure of cladding tubes with a total degree of deformation by their cross-section of 70-80% as a result of polygonization or recrystallization during heat treatment in the temperature range from 480 to 600 °C. It is shown, that there are two competing processes of crystal lattice perfection in cladding tubes at annealing temperatures over 540 °C. The oriented growth of grain nuclei, formed at the boundaries of grains and disoriented with respect to the deformed matrix by an angle of 20-30° about basal axes, is predominant. At the recrystallization of cladding tubes from E110 alloy, a significant change in their crystallographic texture of cold rolling is observed, i.e. an increase of the integral texture parameter fr increases, and a decrease of fT. The grains, formed at the stage of plastic deformation by twinning, prove to be unstable even at the stage of polygonization, due to the mobility of highly disoriented boundaries under conditions of the anisotropic thermal expansion of neighboring regions.
- ПубликацияОткрытый доступSTUDY OF SUBSTRUCTURAL HETEROGENEITY OF TEXTURED MATERIALS BY THE X-RAY METHOD OF GENERALIZED DIRECT POLE FIGURES Исследование субструктурнои неоднородности текстурованных материалов рентгеновским методом обобщенных прямых полюсных фигур(2020) Perlovich, Y. A.; Isaenkova, M. G.; Krymskaya, O. A.; Babich, Y. A.; Fesenko, V. A.; Исаенкова, Маргарита Геннадьевна; Крымская, Ольга Александровна; Фесенко, Владимир Александрович
- ПубликацияОткрытый доступInfluence of the structural state and crystallographic texture of Zr-2.5% Nb alloy samples on the anisotropy of their thermal expansion(2021) Isaenkova, M. G.; Tenishev, A. V.; Krymskaya, O. A.; Stolbov, S. D.; Mikhal'chik, V. V.; Fesenko, V. A.; Klyukova, K. E.; Исаенкова, Маргарита Геннадьевна; Тенишев, Андрей Вадимович; Крымская, Ольга Александровна; Михальчик, Владимир Валерьевич; Фесенко, Владимир АлександровичZirconium remains the main structural material for thermal reactors due to the small capture cross section of thermal neutrons. In the period of stricter safety requirements for reactors with a simultaneous increase in operating parameters, predicting the behavior of the material in emergency situations has gained greater urgency. In this work, we measured the temperature dependence of the thermal expansion of samples cut from thick-walled tubes made of Zr-2.5% Nb alloy that were deformed and annealed in different modes. The analysis of the physical processes responsible for the shaping of the material is carried out. It was found that the anisotropic change in the linear dimensions of cubic samples both during heating and cooling is due to a change in the zirconium content in the beta-phase, phase transformations alpha + beta-Zr -> alpha + beta-Nb -> beta -> alpha + beta-Zr, as well as the preferred orientation of the grains of the alpha-phase, characterized by high anisotropy of linear expansion. It is shown that the expansion of the investigated samples upon heating in the alpha -phase is determined exclusively by the integral texture parameters of Kearns, and the coefficients of thermal linear expansion (TLEC) in different directions vary over a wide range from 3.10-6 to 12.10-6 K-1. During cooling at the stage of the reverse phase transformation of the beta-phase into alpha, an increase in the size of the cubic samples in the tangential direction up to 2.3 % and a decrease in the radial direction to 1.3 % are noted, which is associated with the orientation of the alpha-phase grains formed during cooling in the beta -matrix and anisotropy of the TLEC of the alpha-grains. It is shown that the orientation of the alpha-phase grains in the reverse beta -> alpha transformation is determined not only by the orientation of the basal axes in the initial material, but also by the spatial distribution of the prismatic axes relative to the external directions in the tube. Significant size fluctuations in different directions of the samples obtained using the technology of manufacturing channel tubes for CANDU reactors should lead to the development of significant macrostresses both during heating and cooling of the tube. The structural state of the samples deformed or annealed at 400-530 degrees C does not significantly affect the temperature dependence of the TLEC, but is manifested only in some of its features. In this case, completely recrystallized samples, i.e., with a recrystallization texture, in which the 1120 directions are oriented along the tube axis, are characterized by a significantly lower variation in dimensions in different directions in the temperature range 20-1200 degrees C.
- ПубликацияОткрытый доступАНАЛИЗ ВОЛЬФРАМОВЫХ ПЛАСТИН ЛИМИТЕРА ТОКАМАКА Т-10 ПОСЛЕ ДЛИТЕЛЬНОЙ КАМПАНИИ(НИЯУ МИФИ, 2019) ПИСАРЕВ, А. А.; АРХИПОВ, И. И.; БАБИЧ, Я. А.; БЕРДНИКОВА, М. М.; ГАСПАРЯН, Ю. М.; ГРАШИН, С. А.; ДРОБИНИН, В. Е.; ЕФИМОВ, В. С.; ИСАЕНКОВА, М. Г.; КРЫМСКАЯ, О. А.; ПЕРЛОВИЧ, Ю. А.; СТЕПАНОВА, Т. М.; ФЕСЕНКО, В. А.; Фесенко, Владимир Александрович; Бердникова, Мария Михайловна; Крымская, Ольга Александровна; Ефимов, Виталий Сергеевич; Писарев, Александр Александрович; Исаенкова, Маргарита Геннадьевна; Гаспарян, Юрий МикаэловичЛимитер токамака Т-10 представлял собой кольцо из нержавеющей стали, на котором были установлены 32 пары вольфрамовых пластин с электронной стороны (e-тайлы) и столько же пластин с ионной стороны (i-тайлы). Пластины были изготовлены в НИИЭФА им.Ефремова из вольфрама марки ВМП производства фирмы «Полема» (г.Тула).
- ПубликацияОткрытый доступRegularities of Changes in the Structure of Different Phases of Deformed Zirconium Alloys as a Result of Raising the Annealing Temperature According to Texture Analysis Data(2023) Isaenkova, M.; Krymskaya, O.; Klyukova, K.; Bogomolova, A.; Kozlov, I.; Dzhumaev, P.; Fesenko, V.; Исаенкова, Маргарита Геннадьевна; Крымская, Ольга Александровна; Богомолова, Анастасия Владимировна; Козлов, Илья Владимирович; Джумаев, Павел Сергеевич; Фесенко, Владимир АлександровичBased on the data of synchrotron and electron microscopic studies of deformed and annealed Russian zirconium alloys, the possibility of analyzing the structural-phase state and crystallographic texture of individual phases has been demonstrated. A qualitative and quantitative phase analysis of deformed and annealed tubes made of Zr-Nb-(Sn-Fe-O) alloys was carried out using diffraction patterns obtained with synchrotron radiation. The main О±-Zr phase and the following additional phases: ОІ-Nb, ОІ-Zr, and the Laves phase (intermetallic compound Zr(Nb,Fe)2), were found in the alloys. According to the results of texture analysis of all phases present in the alloy, the mechanisms of plastic deformation, recrystallization, and phase transformations of the main and additional phases were established. It is shown that during plastic deformation of the Zr-1%Nb alloy, a dynamic phase transformation ОІ-Nbв†’О±-Zrв†’ОІ-Zr is observed. It is established that during recrystallization, larger grains of О±-Zr are misoriented relative to the deformed matrix by rotating the prismatic axes around the basal axes by 30В°, while fine grains are improved by polygonization and maintain the orientation of the deformed matrix. Processes for changing the orientation of grains of additional phases as a result of high-temperature annealing are also considered.