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Information × Registration Number 0220U100427, 0119U000004 , R & D reports Title Basic investigations of production processes and physical – mechanical properties of nanostructured radiation resistant steels, high - entopy alloys and protective coatings for material science maintenance of sustainable development of nuclear and fusion power popup.stage_title Head Voyevodin Viktor M., Доктор фізико-математичних наук Registration Date 17-01-2020 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2  The physical and technological foundations of the process of creating a nanostructured state in the reactor steel of ferrite-martensitic class T91 are developed. The application of this process made it possible to reduce the size of the microstructural components of steel to a nanostructured level, which led to an increase in the strength of steel and a significant improvement in its radiation resistance. It was also shown that T91 steel with such a microstructure is less susceptible to radiation hardening, and, consequently, to radiation embrittlement. A fundamentally new class of materials has been created - high-entropy alloys (HEAs), which are strengthened by nanosized particles of thermally stable oxides. The radiation hardening of the 20Cr-40Fe-20Ni-20Mn alloy (composition in at.%) and its oxide- strengthened version in comparison with the hardening of austenitic 316 stainless steel under irradiation under identical conditions were studied. It was shown that hardening increases with an increase in the radiation dose for all studied materials, but for high-entropy alloys it is lower than in stainless steel, i.e., high-entropy alloys during irradiation can retain higher ductility and a longer service life. New alloys based on the Fe-Cr-Al system doped with molybdenum and yttrium have been developed, which have high corrosion resistance at temperatures up to 1300 ° C, typical for emergency situations like "Fukushima". Alloys are intended for applying effective protective coatings (barriers) to the shells of fuel elements made from zirconium alloy in order to prevent accidents in case of loss of liquid that cooling the reactor. It was found that, unlike the zirconium alloy, the coatings does not absorb the isotope of hydrogen, deuterium, from the gaseous medium. The developed alloys have low sputtering ratios under the influence of low-energy hydrogen plasma, which makes it possible to predict the possibility of their use in thermonuclear reactors Product Description popup.authors Ilchenko Oleksandr V. Andrievska Natalia F. Bilous Vitaliy A. Veryovkin Andriy A. Vasilenko Ruslan L. Velikodnyi Oleksiy M. Voyevodin Viktor M. Kalchenko Oleksandr S. Karpov Sergiy O. Klimenko Illya O. Kolodiy Igor V. Komar Anatoliy A. Kopanets Igor Ye. Kuprin Olexandr S. Leonov Sergiy O. Nikitin Arkadiy V. Ovcharenko Valeriy D. Ruzhytskyi Valeriy V. Storozhilov Genadiy Ye. Tykhonovskyi Mykhailo A. Tolmachova Galina M. Tolstolutska Galyna D. Tortika Oleksandr S. popup.nrat_date 2020-04-02 Close