Microstructural characterization of Eurofer-ODS RAFM steel in the normalized and tempered condition and after thermal aging in simulated fusion conditions

In this work we present the results of our research on the microstructure of three EUROFER97-based ODS steels using different characterization techniques. As-received material microstructure is fully ferritic with grain boundaries decorated with carbides and some V-rich inclusions. The austenite tranformation temperature varies from one alloy to another as high as 90 °C. V-rich inclusions precipitation is enhanced after aging at 700 °C in He/0.1% H atmosphere.