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

• Published in: Inorganic materials : applied research 2020, Vol.11 (2), p.359-365
• Main Authors: Rogozhkin, S. V., Iskandarov, N. A., Nikitin, A. A., Khomich, A. A., Khoroshilov, V. V., Bogachev, A. A., Lukyanchuk, A. A., Raznitsyn, O. A., Shutov, A. S., Kulevoy, T. V., Fedin, P. A., Vasiliev, A. L., Presnyakov, M. Yu, Leontyeva-Smirnova, M. V., Mozhanov, E. M., Nikitina, A. A.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Chromium; Computer simulation; Dislocation loops; Ferritic stainless steels; Heavy ions; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Ion irradiation; Iron; Low temperature; Martensitic stainless steels; Materials of Power Engineering and Radiation-Resistant Materials; Materials Science; Molybdenum; Nanoindentation; Nickel; Niobium; Radiation damage; Radiation effects; Radiation hardening; Tungsten
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S207511332002032X

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.