Electron back-scattering diffraction measurements showed that recovery treatment (250C, 0.25h) following a strain of 90% in cold rolling thickness reduction could promote the formation of special boundaries in Pb–Ca–Sn–Al alloy during subsequent moderate cold rolling followed by high-temperature annealing, recovery treatments of shorter or longer duration at this temperature had no such effect. The orientation distribution function, general misorientation and kernel average misorientation analyses indicated very strong texture of single S component and specific dislocation configuration in recovered microstructure were probably the key factors of the effect. High-resolution electron back-scattering diffraction analysis revealed that the formation, migration and interactions of incoherent Σ3 boundaries might be the mechanism of the effect.

Effects of Recovery Treatment after Large Strain on the Grain Boundary Character

Distributions of Subsequently Cold Rolled and Annealed Pb–Ca–Sn–Al Alloy. W.Wang, F.Yin, H.Guo, H.Li, B.Zhou: Materials Science and Engineering A, 2008, 491[1-2], 199-206