Effect of high temperature thermomechanical treatment on the tendency to low-temperature embrittlement of reduced activation 12% Cr ferritic-martensitic steel EK-181
Effect of high-temperature thermomechanical treatment (HTMT) with deformation in the austenitic region, in comparison with traditional heat treatment (THT), on the regularities of low-temperature embrittlement of reduced-activation 12% chromium ferritic-martensitic steel EK-181 during dynamic tests for impact toughness and static tests for uniaxial tension in the range from -196 to 20 °C has been investigated. It was found that HTMT leads to both an increase in the tensile strength properties of steel and an increase in the impact toughness. At the same time, the temperature of its ductile-brittle transition practically does not change relative to the THT. Features of the steel microstructure after HTMT, the formation of separations (at fracture of Charpy-type specimens) in planes parallel to the plane of hot rolling have a positive effect on its impact toughness.
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Keywords
ferritic-martensitic steel, reduced activation steel, impact toughness, ductile-brittle transition temperature, strength, plasticity, high-temperature thermomechanical treatment, fractographyAuthors
| Name | Organization | |
| Polekhina N.A. | Institute of Strength Physics and Materials Science SB RAS | nadejda89tsk@yandex.ru |
| Linnik V.V. | Institute of Strength Physics and Materials Science SB RAS; National Research Tomsk State University | lera.linnik.1999@mail.ru |
| Almaeva K.V. | Institute of Strength Physics and Materials Science SB RAS | kseni_ya_almaeva@mail.ru |
| Litovchenko I.Yu. | Institute of Strength Physics and Materials Science SB RAS; National Research Tomsk State University | litovchenko@spti.tsu.ru |
| Tyumentsev A.N. | Institute of Strength Physics and Materials Science SB RAS; National Research Tomsk State University | tyuments@phys.tsu.ru |
| Moskvichev E.N. | Institute of Strength Physics and Materials Science SB RAS; National Research Tomsk State University | em_tsu@mail.ru |
| Chernov V.M. | Bochvar High-Technology Research Institute of Inorganic Materials | vmchernov@bochvar.ru |
| Leotyeva-Smirnova M.V. | Bochvar High-Technology Research Institute of Inorganic Materials | mvleonteva-smirnova@bochvar.ru |
| Degtyarev N.A. | Bochvar High-Technology Research Institute of Inorganic Materials | vmchernov@bochvar.ru |
| Moroz K.A. | Bochvar High-Technology Research Institute of Inorganic Materials | vmchernov@bochvar.ru |
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