Ultimate Rolling Texture in Pure Aluminum Highly Deformed by Accumulative Roll Bonding: Taylor Orientation Formed beyond Grain Subdivision

Abstract

The texture evolution of an accumulative roll bonding (ARB) processed commercial purity aluminium with lubrication was measured by electron backscattering diffraction with a eld emission-type scanning electron microscope. As a result of texture analysis using orientation distribution function maps, the highest intensity texture component was found to be Taylor orientation after ARB 6 cycle. The result suggests that the deformation of ultra ne grains is similar to Taylor model, which occurs in not only high purity aluminium but also commercial purity aluminium.

Effects of a Preannealing Process on the Morphology of Developed Kinks in Mille-Feuille Structured Cu/A5052 Alloy Fabricated by Accumulative Roll Bonding: Criteria for Kink Formation

“…The Cu/A5052 DMLs were fabricated by the ARB process in this study, and ultrafine grains were formed via "grain subdivision 28) ", which is also observed in the ARB-processed single-phase material. 29) In general, ARB-processed materials do not show high work hardening ability since an ultrafine-grained microstructure is formed via grain subdivision. Thus, the usual uniform deformation due to the introduction of dislocations via plastic deformation is suppressed.…”