Effects of microstructure and texture on the deep drawability of C10200 copper sheets

Abstract

Formability of copper sheet is generally affected by microstructure and crystallographic texture. In this study, the effects of two different microstructure and textures on the deep drawability of C10200 copper sheets were analyzed by the optical microscopy (OM), the scanning electron microscopy (SEM) and the electron back-scattered diffraction (EBSD) technique. The results show that the first rolling reduction rate before intermediate annealing decreased, and the strong {001}<100> (Cube) texture was formed after final annealing. When the second rolling reduction decreased, Cube texture was weak and final annealing textures dominated by {123}<634> (S), {112}<111> (Copper) and {110}<112> (Brass) components were obtained. The texture difference had a great influence on the deep drawing quality. Strong Cube texture was unfavorable for deep drawing because of the more heterogeneous strain distribution resulted from the remarkable planar anisotropy, while the coexistence of S, Copper, Brass, and {110}<001> (Goss) texture components was conducive to improving the average r-values, which was beneficial to the deep drawability.