The microstructure, tensile and impact properties of low-activation ferritic-martensitic steel EK-181 after high-temperature thermomechanical treatment

doi:10.3390/met12111928

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The microstructure, tensile and impact properties of low-activation ferritic-martensitic steel EK-181 after high-temperature thermomechanical treatment	11 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/met12111928

#микроструктура

#механические свойства

#вязко-хрупкий переход

#температура

#ударная вязкость

#высокотемпературная термомеханическая обработка

#расслаивание

#мартенситно-ферритные стали

Title: The microstructure, tensile and impact properties of low-activation ferritic-martensitic steel EK-181 after high-temperature thermomechanical treatment
Creator: Polekhina, Nadezhda A.
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Linnik, Valeria V.
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Litovchenko, Igor Yu.
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Almaeva, Kseniya V.
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Akkuzin, Sergey A.
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Moskvichev, Evgeny N.
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Chernov, Vyacheslav M.
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Leontyeva-Smirnova, Mariya V.
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Degtyarev, Nikolay A.
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Moroz, Kirill A.
Date: 2022
DOI: 10.3390/met12111928
Description: In this work, we study the effect of high-temperature thermomechanical treatment (HTMT) with deformation in the austenite region on the microstructure, tensile properties, impact toughness, and fracture features of advanced low-activation 12% chromium ferritic-martensitic reactor steel EK-181. HTMT more significantly modifies the steel structural-phase state than the traditional heat treatment (THT). As a result of HTMT, the hierarchically organized structure of steel is refined. The forming grains and subgrains are elongated in the rolling direction and flattened in the rolling plane (so-called pancake structure) and have a high density of dislocations pinned by stable nanosized particles of the MX type. This microstructure provides a simultaneous increase, relative to THT, in the yield strength and impact toughness of steel EK-181 and does not practically change its ductile-brittle transition temperature. The most important reasons for the increase in impact toughness are a decrease in the effective grain size of steel (martensite blocks and ferrite grains) and the appearance of a crack-arrester type delamination perpendicular to the main crack propagation direction. This causes branching of the main crack and an increase in the absorbed impact energy.

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collection(s): Физический факультет | Научное управление
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Metals. 2022. Vol. 12, № 11. P. 1928 (1-20)
Language: eng

Created: 14-12-2023

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Физический факультет

Научное управление The microstructure, tensile and impact properties of low-activation ferritic-martensitic steel EK-181 after high-temperature thermomechanical treatment