Registration Number
0220U100353,
0119U101684
, R & D reports
Title
Development of radiation-resistant steels and multicomponent concentric alloys with controlled structural state and high operational properties for use in nuclear energy
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Head
Tihonovskiy Mihaylo A., Кандидат фізико-математичних наук
Registration Date
16-01-2020
Organization
National Science Center "Kharkiv Institute of Physics and Technology"
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The developed modes of intensive plastic deformation and programmable heat treatment made it possible to effectively reduce the average grain size of austenitic steel to the nanostructural level. The created structural state is thermally stable up to a temperature of 650 ° C. Phase analysis showed that in a strongly deformed state, ferrite is present in the steel, whose content with annealing at temperatures up to 600 ° C decreases, and at higher annealing temperatures the ferrite disappears, but a small amount appears. σ-phase.
The microhardness of the steel after IPD is about 3.2 GPa and varies slightly with annealing at temperatures up to 650 ° C and shows high values even after annealing at temperatures up to 750 ° C (2.25 GPa). The yield strength of steel in this state at 20 ° C and 650 ° C is 1.5-1.7 times higher than that of steel with standard grain size. Elongation at a test temperature of 20 ° C increases with annealing at 700 ° C to almost 35%, but at a test temperature of 650 ° C decreases with grain growth, although it remains at a sufficient technological level (12%). The effect of grain size on the oxidation of steel in the atmosphere and its interaction with the melt of a lead coolant have also been established.
Thus, the technological processes developed during the execution of the project make it possible to control the structural state of the austenitic reactor steels and significantly improve their properties.
Product Description
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Efimov Oleksandr A.
Andrіyevska Natalya F.
Vasilenko Ruslan L.
Velikodnyi Oleksiy M.
Voyevodin Viktor Mykolaiovych
Kislyak Igor Pylypovych
Kalchenko Oleksandr S.
Kolodiy Igor V.
Kondratov Oleksandr O.
Kukhar Ivan S.
Levenets Anastasiya Volodymyrivna
Litovchenko Sergii V.
Lukyanenko Oleksandr Genadiyovych
Melnyk Khrystyna R.
Nazarenko Yevgeniy V.
Onischenko Leonid V.
Panov Volodymyr A.
Pylypenko Mykola M.
Stoyev Petro I.
Storogilov Genadiy Ye.
Tantsyura Iryna G.
Tikhonovskiy Mihaylo Andriyovych
Tortika Oleksandr Stepanovych
Fedirko Viktor M.
Chishkala Volodymyr O.
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2020-04-02
