The results of research on the influence of the chemical composition, cold-deformation, and irradiation temperature on the short-time mechanical properties of the austenitic stainless steels 08Kh18N10T, EI-847, EP-172, and ChS-68 after neutron irradiation in the BN-350 fast reactor to damaging dose 57–59 dpa in the range 400–490°C are reported. The investigation showed that high-temperature radiation embrittlement is most pronounced in 08Kh18N10T followed by EI-847 steel. The steels EP-172 and ChS-68 are less susceptible to high-temperature radiation embrittlement. After irradiation, the ultimate strength of the studied steels in the austenitized and cold-deformed state is almost identical. A difference of the plasticity of irradiated samples is observed only for ChS-68, when in the cold-deformed state the plasticity after testing at temperature above 600°C is higher than in the austenitized state. An increase of the irradiation temperature noticeably impacted only the high-temperature mechanical properties of the steels 08Kh18N10T and EI-847. The result of raising the irradiation temperature was that the onset of high-temperature radiation embrittlement shifted toward lower temperatures.
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Translated from Atomnaya Énergiya, Vol. 128, No. 2, pp. 76–81, February, 2020
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Porollo, S.I., Ivanov, A.A., Konobeev, Y.V. et al. High-Temperature Radiation Embrittlement of Neutron-Irradiated Austenitic Stainless Steels 08Kh18N10T, Ei-847, EP-172, and ChS-68. At Energy 128, 82–87 (2020). https://doi.org/10.1007/s10512-020-00655-x
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DOI: https://doi.org/10.1007/s10512-020-00655-x