Deformation Processing of Sheet Metals by Continuous Frictional Angular Extrusion
The feasibility of a novel continuous severe plastic deformation (SPD) technique, continuous frictional angular extrusion (CFAE), for producing ultra-fine grained strip material, has been studied. The CFAE technique takes advantage of facets of rolling and equal channel angular extrusion (ECAE) and is designed to produce bulk ultra-fine grained (UFG) metals with high productivity and low cost. A process setup was established through the modification of a standard rolling mill. CFAE processing of commercially pure aluminium AA1050 sheets was successfully carried out at room temperature, using a 120o die angle. A uniform UFG structure with an average grain size of ~0.6μm was achieved after 10 CFAE passes, at an equivalent strain of ~ 6.6. Evolution of the deformation structure and texture during processing was examined as a function of strain and characterized using high resolution EBSD.
P. B. Prangnell and P. S. Bate
Y. Huang and P. B. Prangnell, "Deformation Processing of Sheet Metals by Continuous Frictional Angular Extrusion", Materials Science Forum, Vol. 550, pp. 241-246, 2007