Abstract
The development of the production process and the joining technologies of oxide dispersion strengthened reduced activation ferritic martensitic (RAFM ODS) steels aims at raising the operating temperature of fusion reactors from 550 up to 650 or even 700 °C. Our laboratory is involved in the development of the entire Eurofer ODS steel production route, from the atomisation of the base alloy powder to the consolidation of the reinforced material powder and the joining of consolidated samples through mechanical alloying. For this, the atomised powder is milled with a small amount of yttrium oxide powder, and then consolidated by hot isostatic pressing (HIP). This technique is the principal route for manufacturing large net-shape or near net-shape parts for structural applications, as well as for joining these parts by diffusion welding. Samples of Eurofer ODS steels with different mechanical alloying parameters have been produced and some characterizations of the microstructure have been done. Some preliminary results were obtained by TEM investigation regarding the different particles present after consolidation.
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