Impurities Effects on the Stored Elastic Energy in Cold-drawn Copper Wires

Abstract

After wire-drawing, the orientation dependent stored elastic energy was measured by neutron diffraction in electrolytic tough pitch copper (ETP 99.99% Cu) wires to improve the knowledge on the chemical composition effect on the static recrystallization behavior. The line broadening measurements on relatively low deformed samples have shown that the stored energy related to the main fibers—the texture develops major {111}〈uvw〉 and minor {001}〈uvw〉 fibers—is about 2–4 J/mol and that the stored energy ratio {111}〈uvw〉/{001}〈uvw〉 decreases when the total impurity content increases. Some hypotheses about the relationship between recrystallization process, recovery and stored energy are finally proposed, and some assumptions about the recrystallization mechanisms are set.