Paper Title
Effect of SN Addition on Microstructure and Mechanical Properties of as-Cast And Hot-Rolled Am60 Magnesium Alloys

Abstract
In this study, the effect of Sn addition on microstructure and mechanical properties of AM60 magnesium alloys was investigated. Sn additions were made by 0.5 and 1 wt%. Alloys were produced by conventional gravity casting in a steel mould. A homogenization treatment at 350 °C for 24 h was performed after the casting processes. Homogenized samples were hot-rolled by 40% thickness reduction at 1 pass at 350 °C. The results showed that Sn addition decreased the grain size of both as-cast and hot-rolled AM60 alloys. Furthermore, Sn addition led to formation of Sn containing second phases. Tensile properties were significantly improved by 0.5 wt% Sn addition above which a small decrease was observed. This improvement was attributed to the refinement of microstructure and dispersion strengthening by Mg-Sn intermetallic phases. Index Terms- AM60 magnesium alloys; Sn modification; microstructure; mechanical properties