Texture and Hardness in Wire Drawn [001] Copper Single Crystals

The crystallographic texture and Vickers hardness which developduring wire-drawing of [001] oriented copper singlecrystals have been studied experimentally as well by simulations.The experiments revealed orientation changes producingcross-shaped patterns in the {200} pole figures andimportant variations in the Vickers hardness across the diameter.Metallographic investigations showed the presence of deformationbands perpendicular to the initial〈 100 〉directions. By adopting a model for the velocity fieldinside the die, simulations have been carried out by using aTaylor type rate sensitive crystal plasticity model, includingmicroscopic hardening. The simulated pole figures show thefeatures of the experimental ones and the predicted stress levelscorrelate well with the measured hardness data.