Effects of Sm addition on microstructure and mechanical properties of Mg–6Al–0.6Zn alloy

The microstructures and mechanical properties of Mg–6Al–0.6Zn alloy with Sm addition have been investigated. The results show that Sm can dramatically improve the yield strength and tensile strength of the alloy at 20–175 °C. With 0.5–2.0 wt.% Sm addition, the microstructure of alloy is remarkably refined. Spotted, high-melting point Al2Sm phases are found in the alloy. The microstructure and mechanical properties of the alloy with 1.5 wt.% Sm addition are found to be optimum.