Experimental and computational techniques have been used to study the influence of Fe and Si, as probable impurities, on the phase composition and microstructure of the Al-2% Cu-2% Mn cold-rolled alloy (wt %). These elements in the total amount up to 0.4% have been found to join together into eutectic Al 15 (Fe,Mn) 2 Si 5 phase inclusions, which have no negative effect on the cold-rolling processability. The hardness and electrical conductivity of the annealed cold-rolled sheets are almost the same as those of the base alloy prepared based on high-purity aluminum.
Aluminum alloys are one of the most common structural materials. To improve the mechanical properties, an alloy of the Al–Zn–Mg–Ca–Fe system was proposed. In this alloy, when Fe and Ca are added, compact particles of the Al10CaFe2 compound are formed, which significantly reduces the negative effect of Fe on the mechanical properties. Because of the high solidification rate (about 600 K/s) during cylindrical ingot (~33 mm) production, the electromagnetic casting method (ECM) makes it possible to obtain a highly dispersed structure in the cast state. The size of the dendritic cell is ~7 μm, while the entire amount of Fe is bound into eutectic inclusions of the Al10CaFe2 phase with an average size of less than 3 μm. In this study, the effect of radial shear rolling (RSR) on the formation of the structure and hardening of the Al–8%Zn–3.3%Mg–0.8%Ca–1.1%Fe alloy obtained by EMC was studied. Computer simulation of the RSR process made it possible to analyze the temperature and stress–strain state of the alloy and to select the optimal rolling modes. It was shown that the flow features during RSR and the severe shear strains near the surface of the rod (10 mm) provided a refining and decrease in the size of the initial Fe-containing particles.
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