Effect of Fe and Si on the Phase Composition and Microstructure Evolution in Al-2 wt.% Cu-2 wt.% Mn Alloy During Solidification, Cold Rolling and Annealing

The effect of iron and silicon content on the phase composition, microstructure, hardness, and electrical conductivity of the Al-2% Mn-2% Cu (wt.%) base alloy in the as-cast state and after deformation and heat treatment has been studied. It has been shown that when Fe and Si are introduced together, they mainly bind to the eutectic Al15(Fe, Mn)2Si3 phase. At a cooling rate of ~ 20°C/s the formation of primary Al6(Fe, Mn, Cu) crystals is...