in: Academic Studies in Engineering Sciences, Halil İbrahim Kurt, Editor, Livre.net , Lyon, pp.43-56, 2020
In this study, the effect of Al and AlTiB (0, 2.5, 5, 10 and 15 wt%) on the microstructure and mechanical properties of a MgZnSn based alloy were investigated. The alloys were produced under a controlled CO2 atmosphere by a green sand casting process. The results show that the addition of Al and AlTiB alloys modified the structure and decreased the grain size. The results of hardness and tensile testing indicate that the hardness and tensile properties of MgZnSn alloy increased by adding AlTiB and then is relatively constant with decreasing grain size. But, different result is also observed in the alloys containing Al. The hardness and tensile properties of MgZnSn alloys decreased with increasing Al alloying elements up to 5 wt% due to increasing coarse eutectic areas. On the other hand, the hardness and tensile properties of MgZnSn alloys increased with increasing AlTiB alloying elements up to 15 wt% due to decreasing grain size.