Mechanical Characteristics of Mg and its Composites Recycled from Mg Chips

Abstract

The Mg chips were recycled using powder metallurgy method and was also reinforced with SiC particles of Vf 10%. The mechanical characteristics of recycled Mg and SiCp/Mg composite were investigated by microhardness and tensile tests, and were compared with those of cast Mg. The microhardness and tensile strength of recycled Mg produced with chips of 40 mm in average size were higher than those of cast Mg, and SiCp/Mg revealed much higher microhardness and tensile strength. The tensile strength of recycled Mg with fine chips of 40 mm was superior to that of recycled Mg with larger chips of 90 mm at room temperature. The tensile strengths of recycled Mg and SiCp/Mg lowered remarkably with increasing temperature. However, the tensile strength of recycled Mg was about two times larger than that of the cast Mg at 573 K. The recycled Mg revealed elongation of approximately less than 5% at room temperature, and the elongation decreased at temperatures higher than 473K.