Effects of Stacking Number on Microstructure and Mechanical Properties for Cold Roll Bonding Process of Dissimilar Aluminum Alloy Sheets

A cold roll-bonding (CRB) process is applied to study the effects of stacking number on microstructure and mechanical properties roll-bonded age-treated Al sheets. Commercial AA1050 AA6061 sheets with a thickness 2 mm were stacked alternately each other two four layers, by multi-pass rolling. The then subjected natural aging (T4) artificial (T6) treatments. as showed typical deformation structure, where grains are elongated in rolling direction regardless number. However, after T4 T6 treatments, had recrystallization structure consisting coarse both AA5052 regions different grain sizes each. In addition, an inhomogeneous hardness distribution direction, higher than age tensile strength T6-treated specimen was that T4-treated one for 4-layer CRBs. elongation specimens processed stack CRB those 2-layer all experimental conditions.