Grain Refining Effect of Al2Ca in A383.0 Al Alloy

Die casting, one of casting processes, has many advantages such as high productivity, excellent casting surface and possibility of making thin parts. Therefore, this process has widely been used from transportation equipment to electrical components. Especially, many Al alloy parts are manufactured by this method because they have good castability. In the A383.0 Al alloy, the strength increases with increasing Mg content. On the other hand, the Mg addition is limited under 0.1wt% since it accelerates the formation of Mg-based oxides and hard inclusions during alloying and casting due to its high oxygen affinity, causing the drop in the mechanical properties of alloys and melt fluidity. In this study, the results of Al2Ca added A383.0 Al alloy about grain refining effect and mechanical properties were compared with those of conventional A383.0 Al alloy. Microstructure observation was carried out using OM and SEM. Mechanical properties were evaluated by tensile and hardness tests.