Regularities of the deformed microstructure of ferritic-martensitic steel EP-823 after high-temperature thermomechanical treatment K. V. Almaeva, I. Yu. Litovchenko, N. A. Polekhina, S. A. Akkuzin
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ArticleContent type: Текст Media type: электронный Subject(s): ферритно-мартенситные стали | высокотемпературная термомеханическая обработка | микроструктура | деформацияGenre/Form: статьи в журналах Online resources: Click here to access online
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Journal of Physics: Conference Series Vol. 1989. P. 012016 (1-5)Abstract: The features of the microstructure of 12% chromium ferritic-martensitic steel EP-823 near the neck region of samples deformed by tension at T=-70, -40 °C, 20 °C and in the temperature range close to the reactor core operating temperatures of T = 650, 720 °C after high-temperature thermomechanical treatment (HTMT) are investigated. It is shown that at negative and room temperatures plastic deformation leads to curvature and fragmentation of martensitic lamellae, formation of new low-angle boundaries and a significant increase in the dislocations density. Deformation at high temperature contributes to the dynamic recovery, dynamic polygonization and increased sizes of carbide and carbonitride particles (M23C6 and MX type).
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The features of the microstructure of 12% chromium ferritic-martensitic steel EP-823 near the neck region of samples deformed by tension at T=-70, -40 °C, 20 °C and in the temperature range close to the reactor core operating temperatures of T = 650, 720 °C after high-temperature thermomechanical treatment (HTMT) are investigated. It is shown that at negative and room temperatures plastic deformation leads to curvature and fragmentation of martensitic lamellae, formation of new low-angle boundaries and a significant increase in the dislocations density. Deformation at high temperature contributes to the dynamic recovery, dynamic polygonization and increased sizes of carbide and carbonitride particles (M23C6 and MX type).
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