Equal channel angular pressing of cooper

Abstract

Equal channel angular pressing is an effective for attaining ultrafine grain sizes. In ECAP, the material is put into an angular channel-die and have a simple shear deformation. The plastic strain per pass depends on the channel angle as well as the corner radius of the die, and typical equivalent strain (e) in 90°die is about 1,0. Because cross sectional area is constant after the pass, the procedures can be repeated limitlessly so that large plastic strain is imposed on the materials. The article provides a basic analysis of influence of grain size on mechanical properties. Authors have experimentally determined development of copper structure and properties at ECAP.