The Role of Mandrel Rotation during CSET Processing Demonstrated on a 3003 Aluminium Alloy

Recently, the complex shearing of extruded tube (CSET) technique was proposed representing a new way processing tubes from bulk billet as combination extrusion with two passes equal channel angular and possible mandrel rotation. In present paper, influence rotation on final microstructure mechanical properties fabricated 3003 aluminium alloy investigated. Electron back scatter diffraction (EBSD) revealed differences in grain size misorientation angles between processed stationary rotating mandrel. Kernel average maps obtained EBSD experiments ASTAR analysis performed transmission electron microscopy proved dislocation density arrangement. The using showed recovered elongated grains separated by low-angle boundaries into subgrains. dynamically recrystallized submicrometer range. Vickers microhardness measurements only 40% HV increase sample prepared compared initial billet. resulted much higher up to 200% result substantial refinement.