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Information × Registration Number 0220U100050, 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 08-01-2020 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 1. A new class of high-entropy non-cobalt Fe-Mn-Cr-Ni-Al alloys with micro- and nanoduplex structure was developed. The composition of the alloys was optimized, which allowed to increase their yield strength to 1000 MPa at 25 °C and to 930 MPa at 400 °C. The plasticity of the alloys is maintained at a high level (more than 50% in compression). These values are far superior to the characteristics of modern reactor steels in the standard state and therefore new alloys are promising for use in nuclear power. 2. The process of controlling the microstructure of T91 ferrite-martensitic steel has been developed, which is promising for use in new generation nuclear reactors and in thermonuclear reactors. Intense plastic deformation at high temperatures allowed to obtain a microstructure with a grain size of less than 100 nm, which led to the record for this steel values of yield strength (1279 MPa at 25 °C and 502 MPa at 600 °C) and strength (1340 MPa at 25 °C and 511 MPa at 600 °C). In contrast to the widely used methods of intensive plastic deformation in the world, the process introduced in this work allows to control the microstructure and properties of steel on an industrial scale. 3. A number of alloys based on the Fe - Cr - Al (alloy) system doped with Y, Mo, and Zr have been developed to apply protective coatings to the fuel claddings. The structure of alloys and the effect of doping on the strength, ultimate strength and durability of materials were studied. A coating process for Zr-1% Nb alloy tubes was developed and found that coatings made of 20 ?m-thick prevent the destruction of fuel claddings in the air at 1100 °C for 1 hour. Product Description popup.authors Andrievska Natalia F. Bilous Vitaliy А. 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 Oleksandr S. Leonov Sergiy O. Nikitin Arkadiy V. Ovcharenko Valeriy D. Ruzhytskyi Valeriy V. Storozhilov Genadiy Yevgeniiovych Tikhonovsky Mykhailo A. Tolmachova Galina M. Tolstolutska Galyna D. Tortika Oleksandr S. popup.nrat_date 2020-04-02 Close