Abstract
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 Mg24Y5 phase and causes the formation of fine and dispersed Mg24Y5 phase. Meanwhile, the dissolved Sm increases the thermal stability of Mg24Y5 phase and enhances its dispersion strengthening in the alloy. It leads to the increased tensile strength of the alloy at elevated temperatures.
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