Experimental analysis of deformation texture evolutions in pure Cu, Cu-37Zn, Al-6Mg, and-8Mg alloys at cold-rolling processes

Generally, two types of deformation textures of copper-type and brass-type textures are evolved in face -centered cubic (FCC) metals. During deformation, dislocation motion determines which texture will be dominant. The copper-type texture is formed in metals of high stacking fault energy by cross-slip of dis-locations and subsequent dislocation cell formation. On the other hand, deformation twinning involves the brass-type texture evolution, whereas some exceptions, such as Al-Mg alloys, also have been reported. This study examined deformation texture evolutions in four cold-rolled FCC alloys of pure Cu, Brass (Cu-37Zn), Al-6Mg, and Al-8Mg alloys. Electron backscattered diffraction and X-ray line profile analysis methods in-vestigated the deformation texture evolution. Three different strains of 0.25, 0.45, and 0.63 were applied to observe the strain effect on texture evolution. In pure Cu, the copper-type texture is developed, as com-monly known. The brass-type texture is developed in Brass and Al-Mg alloys. More reduction ratios in those alloys lead to the copper-type texture strengthening in pure Cu, whereas stronger brass-type texture is shown in Brass and Al-Mg alloys by applying more reduction. While the brass-type texture evolution in Brass can be illustrated by deformation twinning, deformation twins are absent in deformed Al-Mg alloys despite their evident brass-type texture formation. Instead, the short-range ordering (SRO) mechanism can explain the brass-texture evolution in Al-Mg alloys. Planar slips by the high Mg content of Al alloys strengthen the rotated Goss orientation with brass-type texture evolution after cold-rolling processes of those alloys.(c) 2022 Elsevier B.V. All rights reserved.