Grain Refinement Mechanisms Oterative during Equal Channel Angular Pressing of Aluminium
Grain refinement of aluminum deformed by equal channel angular pressing is strongly dependent on the amount of strain. The refinement process at low to high strain level involves elongation of the existing grains by shear deformation, their subdivision into bands and subgrain formation within bands, intersection of the bands during subsequent passes and finally conversion of the subgrains to grains by continuous dynamic recrystallization process. At room temperature the conversion of subgrains to grains takes place by progressive lattice rotation.
Asim Tewari, Satyam Suwas, Dinesh Srivastava, Indradev Samajdar and Arunansu Haldar
R. Manna et al., "Grain Refinement Mechanisms Oterative during Equal Channel Angular Pressing of Aluminium", Materials Science Forum, Vols. 702-703, pp. 135-138, 2012