Abstract
A nanostructured surface layer was pre-formed on a 9Cr2WVTa reduced activation ferritic/martensitic steel sample by means of surface mechanical rolling treatment (SMRT). In comparison with the initial sample, oxidation experiments at 600°C in air showed that the oxidation resistance of the SMRT sample is markedly enhanced, due to the formation of a more continuous, homogenous, and compact oxide scale enriched with Mn. Furthermore, oxidation experiments at 550°C in oxygen-saturated liquid Pb–Bi eutectic alloy showed that the oxidation resistance is improved on the SMRT sample after pre-oxidation in air, due to depressed diffusivities in the pre-formed oxide scale.
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