The effect of warm equal channel angular extrusion on ductility and twinning in magnesium alloy ZK60
journal contributionposted on 2004-01-01, 00:00 authored by Rimma LapovokRimma Lapovok, P F Thomson, R Cottam, Y Estrin
Tensile ductility of magnesium alloy ZK60 pre-strained by warm equal channel angular extrusion (ECAE) was investigated at 300°C. It was shown that a significant ductility (262%) is achievable with this technique for a fairly high strain rate of 3 · 10-3s-1. The effect of prestraining by warm ECAE on twinning under room temperature deformation was also investigated. It was shown that a bi-modal grain structure, whose characteristics are determined by the ECAE route, number of passes and temperature, has a strong effect on the propensity for twinning and mechanical properties, including ductility.