Pages 517-518
Super light and high performance magnesium composite with Mg_2Si dispersions, which has excellent mechanical properties, was developed via combination of solid-state synthesis and hot extrusion. In this study, Bulk Mechanical Alloying (BMA) was firstly carried out for mixture of Mg-Si powders, and obtained compacts were hot extruded, then their microstructures and mechanical properties were evaluated. As a result, Mg_2Si dispersions became finer as BMA cycles increased, and were flowed along extrusion direction. While BMA'd materials shown higher mechanical properties, such as UTS, yield stress and elongation, than the same composite materials extruded without BMA process. Thus, it was confirmed that BMA technique is effective to fabricate fine Mg_2Si dispersions, and leads to the improvement of mechanical properties of those alloy.
