Dependence of texture evolution on initial orientation in drawn single crystal copper

The evolution of fiber texture in the drawn single crystal copper wires with initial orientations of <100 >, <110 > and <111 > parallel to axis direction has been studied via electron backscattering diffraction. During cold drawing process, grain subdivision takes place in the <100 >, <110 > and <111 > single crystals. At high strains, a mixture of <111 > and <100 > fiber textures forms, but due to uneven shear strain, the distribution of the <111 > and <100 > fiber textures is inhomogeneous along the radial direction of wires. The <111 > fiber texture component is located in the centre of wires and <100 > is near the surface. Although grain subdivision appears in the <100 >, <110 > and <111 > single crystals, the stability of the three initial orientations is different. The initial orientations of <100 > and <111 > are more stable than <110 >. <100 > is stable at low strains while <111 > becomes stable at high strains. (C) 2010 Elsevier Inc. All rights reserved.