Recent Development of Equal Channel Angular Rolling (ECAR)
Equal Channel Angular Rolling (ECAR), the severe plastic deformation process, is suitable for shear deforming long and thin sheet continuously. An interesting issue is that thickness of a sheet is not reduced during ECAR. Although shear texture and fine grain structure in Al alloys are easily obtained by ECAR, yet the ECAR process’s difficulties in terms of technical control still remain, such as surface defect, low ductility and low processing speed. The surface defects and processing speed are partially improved by applying a series deformation of rolling and ECAR. A high-speed solution heat-treatment is developed for restoring the ductility of Al 6061 alloy.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Y. H. Chung "Recent Development of Equal Channel Angular Rolling (ECAR)", Materials Science Forum, Vols. 638-642, pp. 1917-1922, 2010