THE EVOLUTION OF THE STRUCTURE AND THE PHASE COMPOSITION OF 12Х18Н10Т STEEL IRRADIATED BY NEUTRONS AFTER LONG-TERM ISOTHERMAL ANNEALING
https://doi.org/10.52676/1729-7885-2018-1-84-90
Abstract
The paper presents the results of a study on the possible causes of differences in the structure and properties of the material samples of the FA`s cover (the screen type of the BN-350 reactor), depending on the temperature and duration of the post-radiation tests. It has been established that prolonged aging of the samples of the BN-350 reactor fuel assembly material up to 5000 hours leads to an increase in the concentration and size of carbide precipitates (such as Me23C6). It is assumed that changes in the microstructure: the grain size, the concentration of secondary precipitates, the displacement of carbides to the grain boundaries and their accumulation at triple junctions, occurs not only with an increase in the test temperature in short-time intervals (650–1050 °C isochoric annealing), and also in long-time exposure to high temperatures (5000 h, 400 °C, 600 °C, isothermally annealed).
About the Authors
E. T. Koyanbaev
Branch “Institute of Atomic Energy” NNC RK
Kazakhstan
Kurchatov
Kazakhstan
Kurchatov
E. E. Sapataev
Branch “Institute of Atomic Energy” NNC RK
Kazakhstan
Kurchatov
Kazakhstan
Kurchatov
E. A. Kozhakhmetov
Branch “Institute of Atomic Energy” NNC RK
Kazakhstan
Kurchatov
Kazakhstan
Kurchatov
I. M. Kukushkin
Branch “Institute of Atomic Energy” NNC RK
Kazakhstan
Kurchatov
Kazakhstan
Kurchatov
Sh. R. Kurbanbakov
Branch “Institute of Atomic Energy” NNC RK
Kazakhstan
Kurchatov
Kazakhstan
Kurchatov
A. Zh. Miniyazov
Branch “Institute of Atomic Energy” NNC RK
Kazakhstan
Kurchatov
Kazakhstan
Kurchatov
O. S. Bukina
Branch “Institute of Atomic Energy” NNC RK
Kazakhstan
Kurchatov
Kazakhstan
Kurchatov
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Review
For citations:
Koyanbaev E.T., Sapataev E.E., Kozhakhmetov E.A., Kukushkin I.M., Kurbanbakov Sh.R., Miniyazov A.Zh., Bukina O.S. THE EVOLUTION OF THE STRUCTURE AND THE PHASE COMPOSITION OF 12Х18Н10Т STEEL IRRADIATED BY NEUTRONS AFTER LONG-TERM ISOTHERMAL ANNEALING. NNC RK Bulletin. 2018;(1):84-90. (In Russ.) https://doi.org/10.52676/1729-7885-2018-1-84-90
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