Effect of High Temperature Thermomechanical Treatment on the Tendency of Low-Activation 12% Cr Ferritic-Martensitic Steel EK-181 to Low-Temperature Embrittlement

The effect of high-temperature thermomechanical treatment (HTMT) with deformation in the austenitic region on the regularities of low-temperature embrittlement of low-activation 12% chromium ferritic-martensitic steel EK-181 is investigated in comparison with traditional heat treatment (THT) during...

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Bibliographic Details
Published in:Russian physics journal 2022-04, Vol.64 (12), p.2225-2231
Main Authors: Polekhina, N. A., Linnik, V. V., Almaeva, K. V., Litovchenko, I. Yu, Tymentsev, A. N., Moskvichev, E. N., Chernov, V. M., Leontyeva-Smirnova, M. V., Degtyarev, N. A., Moroz, K. A.
Format: Article
Language:English
Subjects:
Analysis
Chromium
Condensed Matter Physics
Deformation effects
Dual phase steels
Ductile-brittle transition
Dynamic tests
Embrittlement
Ferritic stainless steels
Hadrons
Heat treatment
Heavy Ions
High temperature effects
Hot rolling
Impact strength
Lasers
Low temperature
Martensitic stainless steels
Mathematical and Computational Physics
Mechanical properties
Nuclear Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Static tests
Steel
Tensile strength
Theoretical
Thermomechanical treatment
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Summary:The effect of high-temperature thermomechanical treatment (HTMT) with deformation in the austenitic region on the regularities of low-temperature embrittlement of low-activation 12% chromium ferritic-martensitic steel EK-181 is investigated in comparison with traditional heat treatment (THT) during dynamic tests on impact toughness and static tests on uniaxial tension in the range from −196 to 20°C. It is found out that HTMT increases both the tensile strength properties of steel and its impact toughness. At the same time, the temperature of its ductile-brittle transition does not practically change relative to the THT. It is observed that the features of steel microstructure after HTMT, the formation of delaminations (during fracture of Charpy-type specimens) in the planes parallel to the plane of hot rolling, have a positive effect on its impact toughness.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-022-02581-w