Abstract

The nanostructure of Eurofer97 reduced activation 9% chromium ferritic-martensitic steel (9Cr1W0.2VTa0.1C) irradiated by neutrons in BOR-60 reactor at a temperature of 332°C up to 32 dpa is studied by atom probe tomography. A high number density (1024 m−3) of ∼3–5 nm clusters enriched in chromium, manganese, and silicon atoms is found in the material. An analysis of the redistribution of chemical elements in the material shows that the steel matrix becomes substantially depleted of chromium.

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