Metallographic Studies on Deformation Microstructures of ECAE Processed AA 2014 Aluminium Alloy
Different initial texture of ring rolled AA 2014 alloy was processed to one pass in Equal Channel Angular Extrusion (ECAE) at room temperature. The material flow/deformation characteristics as well as the degree of grain refinement, as a function of different initial grain morphological orientation are studied. Macroscopic and microscopic investigation by Optical Microscope (OM) confirms the significant variation in the shearing characteristics of grains in the billets in each orientations. OM observations also suggested that the severity of deformation was more in middle portions of the extruded billets. TEM observations made on the samples also confirmed the existence of regions which had undergone the different degree of dynamic recovery and recrystallisation after passing through shear deformation zone.
Asim Tewari, Satyam Suwas, Dinesh Srivastava, Indradev Samajdar and Arunansu Haldar
A. P. Murugesan et al., "Metallographic Studies on Deformation Microstructures of ECAE Processed AA 2014 Aluminium Alloy", Materials Science Forum, Vols. 702-703, pp. 109-112, 2012