Fig. 1 Optical micrographs on the longitudinal section containing RD and ND of brass a, Cu b at the initial state

Fig. 2 Schematic of a roll-bonded brass/Cu specimen

Fig. 3 CLSM micrographs observed on the longitudinal sections of the brass/Cu specimens after different rolling reductions: a 52%; b 57%; c 66%; d 73%

Fig. 4 CLSM micrograph observed on the longitudinal sections of the 73% rolled brass/Cu specimen a and the magnified images of the selected regions in a of Cu b and brass c areas

Fig. 5 Vickers hardness (HV) obtained at different thicknesses of the 52% a, 57% b, 66% c and 73% d rolled brass/Cu specimens. In the plots, the x-axis indicates the distances from "surface" layer of the outer Cu sheet to positions where the hardness indentations locate

Fig. 6 Textures at different thickness positions of brass in the 73% deformed specimen, using α and τ fiber representation: a α fiber with constant Euler angles Φ = 45° and φ 2 = 0°; b β fiber with local maximum texture intensity along a skeleton line (with variable coordinates); c τ fiber with constant Euler angles φ 1 = 90° and φ 2 = 45°

Fig. 7 Textures at different thickness positions of Cu in the 73% deformed specimen, using α and τ fiber representation: a α fiber with constant Euler angles Φ = 45° and φ 2 = 0°; b β fiber with local maximum texture intensity along a skeleton line (with variable coordinates); c τ fiber with constant Euler angles φ 1 = 90° and φ 2 = 45°