from the conferences organized by TANGER Ltd.
Development of materials with ultra-fine-grained structure belongs at present to the front-end areas of research of materials and forming technologies in the whole world. Nano-structural materials in mechanical engineering, metallurgy, automotive, military and aerospace industry are applied. Research areas of SPD processes as ECAP and DRECE technology at the Department of mechanical technology VSB – Technical University of Ostrava are intensively developed. Forming process DRECE is an extrusion technology with limited cross-sectional reduction to achieve high degree of deformation of the suitable selected material. DRECE machine can unequivocally contribute to implementation of new production technology for strip sheets and rods made of non-ferrous metals and steels (as semi-finished products), which have substantially higher mechanical properties with preservation of their formability. Experiments with use of selected steels and brass were made on the DRECE machines to achieve grain refinement in the strip of sheet with dimensions 58 x 2 x 1 000 mm. Metallographic analysis of structure was made on optical microscope NEOPHOT 2 and mechanical properties of studied samples by tensile test and Vickers hardness method were tested.
Keywords: DRECE method, severe plastic deformation, steel and brass strip sheets and rods, structure, mechanical properties© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.