Interaction of a copper oxide particle with copper in drawing

Abstract

The forming of copper near a copper oxide particle is determined during multiple-pass drawing. The interaction of the copper oxide particle with copper is studied by the calculation of the state of stress in a finite element formulation and using scanning electron microscopy data. The results obtained demonstrate that pores appear around copper oxide particles when strain accumulates in multiple-pass drawing machines. The pore length increases with the accumulated strain, which can result in breaks of a wire in a highly cold-worked state. © 2012 Pleiades Publishing, Ltd.