Enhanced Dispersion Strengthening of Sm in Mg-10Y-0.5Sm Alloy

摘要

The enhanced dispersion strengthening of Sm in Mg-10Y-0.5Sm has been investigated by means of microstructure analysis and tensile tests. The results show that Sm addition improves the image of Mg_24Y_5 phase and causes the formation of fine and dispersed Mg_24Y_5 phase. Meanwhile, the dissolved Sm increases the thermal stability of Mg_24Y_5 phase and enhances its dispersion strengthening in the alloy. It leads to the increased tensile strength of the alloy at elevated temperatures.