Abstract
The comprehensive study of radiation hardening of the ferritic-martensitic steels RUSFER-EK-181 (Fe–12 Cr–2 W–V–Ta–B–0.16 С) and ChS-139 (Fe–12 Cr–Ni–Mo–W–Nb–V–N–B–0.20 C) using Fe ion irradiation at temperatures of 250–400°С to damage doses of ~6 dpa is conducted. The quantitative analysis of radiation-induced changes in the RUSFER-EK-181 and ChS-139 steel microstructure is performed by transmission electron microscopy and atom probe tomography. The study of hardening of steel samples irradiated with ions by nanoindentation and the evaluation within the framework of the dispersed barrier model show that the detected radiation-induced clusters and dislocation loops play an important role in the low-temperature radiation hardening of the RUSFER-EK-181 and ChS-139 steels.
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ACKNOWLEDGMENTS
The irradiation of samples and tomographic atom probe analysis were performed on the equipment of the KAMIKS Shared Access Center (http://kamiks.itep.ru/) of the National Research Center Kurchatov Institute—ITEP; preparation of samples by focused ion beam methods was performed on the equipment of the Resource Center NANOZOND of the National Research Center Kurchatov Institute (http://www.rc.nrcki.ru/pages/main/nanozond/).
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This study was carried out with a grant from the Russian Science Foundation (project no. 17-19-01696).
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Translated by A. Kolemesin
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Rogozhkin, S.V., Iskandarov, N.A., Nikitin, A.A. et al. Study of the Microscopic Origins of Radiation Hardening of Ferritic-Martensitic Steels RUSFER-EK-181 and ChS-139 in the Simulation Experiment with Heavy Ion Irradiation. Inorg. Mater. Appl. Res. 11, 359–365 (2020). https://doi.org/10.1134/S207511332002032X
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DOI: https://doi.org/10.1134/S207511332002032X