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.