Abstract
Low-temperature radiation hardening of prospective structural steel Eurofer 97 as the material for the first wall of the DEMO fusion reactor is studied in this work. Specimens of Eurofer 97 steel were irradiated with Fe ions up to 10 dpa at temperatures of 250, 300 and 400°C. Irradiated samples were studied by transmission electron microscopy and atom probe tomography. TEM study of irradiated samples showed preferential formation of dislocation loops at all temperatures of irradiation. Pair-correlation function analysis detected the initial stage of matrix solid solution decomposition of Eurofer 97 steel only at the temperature of 400°C. Detected microscopic changes and calculated hardening in the framework of the DBH (dispersed barrier hardening) model have shown that formation of dislocation loops is the main origin of low temperature radiation hardening of Eurofer 97 under irradiation with Fe ions with fluence up to 10 dpa.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
Petersen, C., Povstyanko, A., Prokhorov, V., Fedoseev, A., Makarov, O., and Dafferner, B., Impact property degradation of ferritic/martensitic steels after the fast reactor irradiation “ARBOR 1,” J. Nucl. Mater., 2007, vols. 367–370, pp. 544–549.
Gaganidze, E., Petersen, C., Materna-Morris, E., Dethloff C., Weiß , O.J., Aktaa, J., Povstyanko, A., Fedoseev, A., Makarov, O., and Prokhorov, V., Mechanical properties and TEM examination of RAFM steels irradiated up to 70 dpa in BOR-60, J. Nucl. Mater., 2011, vol. 417, pp. 93–98.
Gaganidze, E., Dafferner, B., Ries, H., Rolli, R., Schneider, H.-C., and Aktaa, J., Irradiation Programme HFR Phase IIb–SPICE Impact Testing on Up to 16.3 dpa Irradiated RAFM Steels: Final Report for Task TW2-TTMS 001b-D05, Karlsruhe: Forschungszentrum Karlsruhe, 2008.
Materna-Morris, E., Möslang, A., Rolli, R., and Schneider, H.C., Effect of helium on tensile properties and microstructure in 9% Cr–WVTa-steel after neutron irradiation up to 15 dpa between 250 and 450°C, J. Nucl. Mater., 2009, vols. 386–388, pp. 422–425.
Rogozhkin, S.V., Nikitin, A.A., Aleev, A.A., Germanov, A.B., and Zaluzhnyi, A.G., Atom probe study of radiation induced precipitates in Eurofer97 ferritic-martensitic steel irradiated in BOR-60 reactor, Inorg. Mater.: Appl. Res., 2013, vol. 4, no. 2, pp. 112–118
Rogozhkin, S., Nikitin, A., Orlov, N., Bogachev, A., Korchuganova, O., Aleev, A., Zaluzhnyi, A., Kulevoy, T., Lindau, R., Mölang, A., and Vladimirov, P., Evolution of microstructure in advanced ferritic-martensitic steels under irradiation: The origin of low temperature radiation embrittlement, MRS Adv., 2017, vol. 2, pp. 1143–1155.
van der Schaaf, B., Tavassoli, F., Fazio, C., Rigal, E., Diegele, E., Lindau, R., and LeMarois, G., The development of EUROFER reduced activation steel, Fusion Eng. Des., 2003, vol. 69, pp. 197–203.
Kropachev, G., Kuibeda, R., Kozlov, A., Chalyh, B., Fertman, A., Kulevoy, T., Nikitin, A., Aleev, A., and Rogozhkin, S., MEVVA ion beam for reactor material investigation, Rev. Sci. Instrum., 2010, vol. 81, p. 02B906.
Khoroshilov, V.V., Korchuganova, O.A., Lukyanchuk, A.A., Raznitsyn, O.A., Aleev, A.A., and Rogozhkin, S.V., On the precision preparation of samples for atom probe tomography using a focused ion beam in a SEM, J. Surf. Invest.: X-ray, Synchrotron Neutron Tech., 2018, vol. 12, no. 1, pp. 87–93.
Rogozhkin, S.V., Aleev, A.A., Lukyanchuk, A.A., Shutov, A.S., Raznitsyn, O.A., and Kirillov, S.E., An atom probe tomography prototype with laser evaporation, Instrum. Exp. Techn., 2017, vol. 60, no. 3, pp. 428–433.
Lucas, G.E., The evolution of mechanical property change in irradiated austenitic stainless steels, J. Nucl. Mater., 1993, vol. 206, pp. 287–305.
Klimenkov, M., Materna-Morris, E., and Möslang, A., Characterization of radiation induced defects in EUROFER 97 after neutron irradiation, J. Nucl. Mater., 2011, vol. 417, pp. 124–126.
Bergner, F., Pareige, C., Hernandez-Mayoral, M., Malerba, L., and Heintze, C., Application of a three-feature dispersed-barrier hardening model to neutron-irradiated Fe–Cr model alloys, J. Nucl. Mater., 2014, vol. 448, pp. 96–102.
Mansur, L.K., Theory of transitions in dose dependence of radiation effects in structural alloys, J. Nucl. Mater., 1993, vol. 206, pp. 306–323.
ACKNOWLEDGMENTS
This work was supported by the Russian Science Foundation (project no. 17-19-01696). The irradiation of the samples and the tomographic atomic probe analysis were carried out on the equipment of the KAMIKS Center for Collective Use (http://kamiks.itep.ru/) of the National Research Center Kurchatov Institute—ITEP; studies using the transmission electron microscopy were carried out on the equipment of the NANOZOND Resource Center of the National Research Center Kurchatov Institute (http://www.rc. nrcki.ru/pages/main/nanozond/).
Author information
Authors and Affiliations
Corresponding authors
Additional information
Translated by Sh. Galyaltdinov
Rights and permissions
About this article
Cite this article
Rogozhkin, S.V., Nikitin, A.A., Khomich, A.A. et al. Study of Microscopic Origins of Radiation Hardening of Eurofer 97 in Simulation Experiment with Ion Irradiation. Inorg. Mater. Appl. Res. 10, 333–338 (2019). https://doi.org/10.1134/S2075113319020357
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S2075113319020357