Abstract
The microstructural, mechanical behaviour of Mg-5Sn-3Zn-1Mn alloy with different Si additions (0.5, 1, 1.5 wt. % Si) are investigated and morphological changes of Mg-5Sn are observed with the addition of each element like 3Zn and 1Mn. Si added Mg-5Sn-3Zn-1Mn alloy exhibits two different phases namely Mg 2 Sn and Mg 2 Si. Two distinct phases observed are rod like Mg 2 Sn phase and Chinese script Mg 2 Si upto 1wt%. When Si addition exceeds 1.5% polygonal shaped primary Mg 2 Si particles are formed. In Mg-5Sn-3Zn-1Mn alloy addition of Si up to 1wt% enhances the mechanical properties adequately. Above 1 wt% of Si addition, a slight reduction on tensile property is noticed, which is due to the formation of hard, brittle polygonal primary and coarse Chinese script phases.
Influence of Si Addition on the Microstructure and Mechanical Behaviour of Mg-5sn-3zn-1mn Alloy
