Microstructural characterization of Eurofer-97 and Eurofer-ODS steels before and after multi-beam ion irradiations at JANNUS Saclay facility

Daniel Brimbal (1) , Lucile Beck (1) , Oliver Troeber (2) , Ermile Gaganidze (2) , Patrick Trocellier (1) , Jarir Aktaa (2) , Rainer Lindau (2)

1 Lab JANNUS
2 IAM - Institute for Applied Materials [Karlsruhe]

RAFM steels such as Eurofer-97 and Eurofer-ODS are potential structural materials for future fusion reactors. In order to study their resistance to the high energy neutrons they will be subjected to in this context, we have irradiated these materials in single-, dual- and triple-beam mode to 26 dpa at 400C. In single-beam mode (Fe ions only), both materials resist swelling but dislocation loops form. For dual- (Fe and He ions) and triple-beam (Fe, He and H) modes, the same dislocation loop microstructure is observed as for the single-beam mode, but small cavities form, aided by the presence of gases. Despite the formation of cavities, swelling is very low for the present conditions. The influence of ODS particles on swelling is briefly discussed.

Mots clés: Ion implantation; TEM; RAFM steel; Helium; Irradiation

Domaines: Physique Nucléaire Théorique [nucl-th]; Physique Nucléaire Expérimentale [nucl-ex]

Daniel Brimbal, Lucile Beck, Oliver Troeber, Ermile Gaganidze, Patrick Trocellier, et al.. Microstructural characterization of Eurofer-97 and Eurofer-ODS steels before and after multi-beam ion irradiations at JANNUS Saclay facility. Journal of Nuclear Materials, 2015, 465, pp.236-244. ⟨10.1016/j.jnucmat.2015.05.045⟩. ⟨cea-02383837⟩