Textures and grain boundary character distributions in a cold rolled and annealed Pb-Ca based alloy

Samples of a Pb-0.08%Ca-1.8%Sn-0.026%Al alloy were cold rolled at −196 °C to a reduction in thickness of 10-60%, and then annealed for 3 min at 270 °C. The textures after rolling and after annealing were measured using electron backscatter diffraction. The special boundary content of the final microstructures varied from 13% to 81%, with the minimum found in the sample with 10% strain and the maximum in the sample with 40% strain. The sample with the highest fraction of special boundaries also contains texture components, which were developed by the so-called oriented growth (OG) of Goss ({1 1 0}〈0 0 1〉), R1 ({1 2 4}〈1 2 1〉), R2 ({1 1 4}〈2 2 1〉) and R3 ({1 2 3}〈3 0 1〉) orientations (including their geometric variants). These texture components are related by the ∑3n (n = 1, 2, 3) misorientations and this contributes to the high special boundary fraction.