Oxide Dispersion Strengthened Stainless steels are good candidates for many nuclear applications due to their specific microstructure composition [1], To obtain a convenient distribution of oxides: they are obtained by Mechanical Alloying and Powder Metallurgy techniques [4]. Consolidation is obviously a crucial step for the production of operational components. Among various processes, extrusion is commonly used for bars and tubes like claddings, [2]. Using the CEA facilities some ferritic ODS grads are consolidated by hot co-extrusion in a soft steel can. This paper presents some experimental results and a numerical modelling of this co-extrusion through a conical die. Due to the high extrusion ratio the consolidation step is a combination of shearing and high compressive stress, [3]. The aim of the study is to identify the mechanical loading of a material point during the consolidation process and the involved consequences on the geometry and microstructure of the obtained bar.
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