Tensile and indentation creep behavior of Mg–5% Sn and Mg–5% Sn–2% Di alloys

The tensile properties and the indentation creep resistance of as-cast Mg–5 wt% Sn and Mg–5 wt% Sn–2 wt% Di alloys were studied in this paper. It has been shown that the tensile properties of Mg–5% Sn–2% Di alloy are comparative with that of AE42 alloy at room temperature and at 150 °C and 175 °C. The indentation creep experiments were conducted at 150 °C and 175 °C, suggesting that Mg–5% Sn–2% Di alloy has significantly better indentation creep resistance than AE42. The microstructure of Mg–5% Sn alloy is characterized by the presence of thermally stable Mg2Sn particles mainly along grain boundaries, and addition of 2 wt% Di to this alloy results in the appearance of new Sn–Di phase, which further significantly enhance the strength and creep resistance.