Characteristics of long {10-12} twin bands in sheet rolling of a magnesium alloy

Sheet rolling was performed at room temperature on a friction-stir-welded Mg alloy. Long twin bands comprising small {10-12}<-1011> twins (average size similar to 7 mu m) were revealed. Based on the long twin bands identified, the grain boundary disorientation and strain accommodation between neighboring twins and global Schmid factors were assessed. The results indicate that these factors are favorable for the formation of such long twin bands in the applied rolling deformation. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.