Nanoindentation on ion-irradiated Fe-Cr alloys

Nanoindentation on ion-irradiated Fe-Cr alloys

Heintze, C.; Hernández Mayoral, M.; Bergner, F.


Ferritic/martensitic high-chromium steels are candidate structural materials for future nuclear applications such as fusion and generation IV fission reactors. Nevertheless these steels suffer hardening and embrittlement due to neutron irradiation. Ion irradiation is an efficient tool to simulate neutron irradiation effects without the drawbacks of producing radioactive material. In the present work ion-irradiation in combination with nanoindentation has been applied to study the irradiation-induced hardening of binary Fe-Cr alloys. The details of the approach are specified and the effects of Cr content and irradiation conditions including both single-beam and dual-beam irradiations are considered. Transmission electron microscopy is used to characterize irradiation-induced defects. Ion-irradiation-induced hardening is compared to hardening observed after neutron irradiation at similar conditions and dominant hardening mechanisms are identified.

Keywords: ion irradiation; Fe-Cr alloys; nanoindentation; TEM; radiation hardening

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    5th Workshop on Nuclear Fe Alloys: Modeling and Experiment, 28.-29.11.2013, Roma, Italia