Structural and phase transformations in a new eutectic Al-Ca-Mn-Fe-Zr-Sc alloy induced by high pressure torsion

Abstract

The effect of high-pressure torsion (HPT) on the structural and phase transformations in a new eutectic aluminium alloy (94.9%Al; 3.5%Ca; 0.9%Mn; 0.5%Fe; 0.1%Zr; 0.1%Sc) was studied. HPT leads to the formation of a nanocrystalline structure with a predominant grain size of 11–34 nm. HPT causes the refining of eutectic [(Al) + Al4Ca] and the formation of nanoclusters and segregations. The phase composition of the alloy after HPT tends to the phase composition at elevated temperatures.