On the feasibility of a novel severe plastic deformation method for cylindrical tubes; friction assisted tubular channel pressing (FATCP)

This paper introduces a novel severe plastic deformation method entitled Friction assisted tubular channel pressing (FATCP) for producing ultrafine-grained cylindrical tubes. For this purpose, using the precious potential of friction power increases temperature in deformation area and provides localized material softening, severe combined strains and lower pressing force. At first, presented method was executed on the Cu-35Zn alloy and this process exhibits good applicability for this material. Investigation of microstructure of FATCPed sample showed a significant grain refinement from an initial average grain size of 70 mu m to less than 5 mu m after a single pass. Also, hardness notably increased to 132 Hv from an initial value of 60 Hv.