Microstructure and texture of Mg-Al-Zn alloy processed by differential speed rolling

The microstructure and the texture of the Mg-3.10Al-1.06Zn-0.35Mn (in wt.%) alloy processed by differential speed rolling (DSR) were investigated by optical microscopy, X-ray texture analysis and electron backscattered diffraction (EBSD) analysis. The DSR processed sheet exhibited the unidirectional shear bands with an inclination to the rolling direction. The macro-texture analysis results showed a large inclination of c-axis toward the opposite direction of the rolling direction at about 15 degrees. On the other hand, the micro-texture analysis revealed that the inclination directions of c-axis were reverse between the shear bands and the remaining coarse grain regions, and the latter dominated the macro-texture. This anomalous texture can be attributed to the formation of the unidirectional shear bands. (c) 2007 Elsevier B.V. All rights reserved.