Substructure and texture formation during extrusion of NiAl single crystals

<1 0 0> and <1 1 0> oriented NiAl single crystals have been extruded at 1000 °C through a round die. The crystals subdivide into two types of deformation bands producing fibre texture components parallel and normal to the extrusion axis. These rotations as well as shape changes under partially constrained deformation conditions yield informations on the slip system activity. The relevance of deformation banding on texture formation in polycrystals is discussed.