Influence of directional microstructure on mechanical properties in Al-based ultrafine bimodal lamellar structured alloy

Abstract

The influence of the directional microstructure on the mechanical properties of Al81Cu13Si6 bimodal eutectic alloy was investigated via minor alloying of Iron (Fe). Al81Cu13Si6 is the well-known bimodal eutectic alloy, which has a good combination of strength and plasticity. A small amount of Fe elements (0.3-1 at%) led to the notable microstructural evolution from the nondirectional bimodal eutectic to directional bimodal eutectic structure. With this microstructural change, the compressive mechanical properties were remarkably degraded. The present short letter is focused on to investigate the deformation behaviors because of the Fe minor alloying-induced microstructural change.