Correlation of Earing and Texture in Weakly Orthotropic Sheets of Cubic Metals

Abstract

It has long been recognized that the earing of deep-drawn cups is due to the anisotropy of rolled sheets (cf. Hill [1] and the references therein). Earlier experimental studies show indications that the percent earing ε _r of rolled sheets might be correlated to their planar anisotropy Δ _r [2, 3] or to the parameter ${{\Delta r} \mathord{\left/ {\vphantom {{\Delta r} {\bar r}}} \right. \kern-\nulldelimiterspace} {\bar r}}\left[ 4 \right]$ , where ${\bar r}$ is the average (plastic) strain ratio. Attempts [5–8] have been made to correlate earing behavior with polycrystalline texture, among which are two recent studies [7, 8] on aluminum sheets that report correlation of ε _r with the coefficient W ₄₄₀ of the orientation distribution function [9].