Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

The talk is focussed on fabrication, in particular non-standard or alternative fabrication routes towards ODS steels. There is a natural reference for that, namely state-of-the-art ODS steels produced by the ‘classical’ PM route, which consists of the production of a pre-alloy, gas atomization, mechanical alloying, consolidation and thermal, mechanical or thermo-mechanical treatment. The motivation to consider alternative routes is derived from problems such as the multi-step/multi-parameter character of the PM process and the resulting high production costs, limited throughput and limited reproducibility. These problems can be addressed by way of improving, simplifying, skipping or combining individual steps, by way of reconsidering alloy fabrication from the melt or by looking for hybrid routes. It is demonstrated that there is a wide and fascinating potential for alternative fabrication routes towards ODS steels. For this to be achieved, each of the steps involved in the classical PM route has to be carefully reconsidered. Moreover, the liquid metal route and hybrid routes composed of PM and LM elements have to be taken into account. Significant progress has been made on particular process steps. These include substitution of mechanical alloying, scaling up of SPS and the contactless excitation of cavitation.