Microstructure, Thermal Conductivity and Mechanical Properties of Mg-Zn-Mn-Y Quaternary Alloys

As-cast, as-extruded and T6 heat-treated Mg-2Zn-0.3Mn-[x] wt.% Y (x = 0, 0.4, 0.8) alloys were formed via a melting process, an extrusion process and T6 aging treatment, respectively. Microstructural analysis showed that the addition of yttrium (Y) resulted in grain refinement in the samples. The hot extrusion process and T6 heat treatment contributed to the precipitation of second phases and a reduction of the dislocation density as well as to...