Recent developments of SPD processing for fabrication of bulk nanostructured materials

During the last decade severe plastic deformation (SPD) techniques have been successfully used for fabrication of nanostructures in various bulk metallic materials. This paper presents several results from recent investigations of SPD materials focussing on two main objectives: circle modelling and experimental works on SPD techniques, aiming to produce homogeneous nanostructures in bulk large-size billets and to process hard-to-deform and low-ductile materials; circle establishing the influence of SPD (strain amount, temperature, applied pressure etc) and microstructure (types of grain boundaries, defect structures) parameters on enhancement of properties in as-processed materials.