Caliber Rolling Process and Mechanical Properties of High Fe-Containing Al–Mg–Si Alloys

Abstract

Fe-intermetallic compounds are commonly detrimental for mechanical properties and formability of aluminum alloys. In this study, the refinement of Fe-intermetallic compounds and mechanical properties in high Fe-containing Al–Mg–Si alloys were studied by caliber rolling. The Al–(2.2–2.3) mass%Si–0.9 mass%Mg–(1, 1.5 and 2) mass%Fe alloys were severely deformed by the multi-pass caliber rolling at 573 and 723 K. Fe-intermetallic compounds were finely fragmented with the smallest size of around 200 nm. The morphologies of fragmented Fe compounds in the Al matrix depend on the as-cast microstructure and deformation behavior with better distribution in the outer area than in the center area. Good ultimate strength of 345–360 MPa and high elongation of 15–25% were achieved after 95% caliber rolling.