WROUGHT MAGNESIUM ALLOYS WITH HIGH MECHANICAL PROPERTIES AND METHOD FOR PREPARING THE SAME

摘要

The present invention relates to bismuth (Bi) in an amount of 2.0 to 8.0% by weight; 0.5 to 6.5% by weight of aluminum (Al); Magnesium (Mg) balance; And it relates to a magnesium alloy extruded material containing unavoidable impurities, wherein the magnesium alloy extruded material according to the present invention further includes aluminum (Al) in the Mg-Bi binary alloy, thereby promoting dynamic recrystallization during extrusion to obtain uniform and fine grains. It has fine secondary phase (Mg 3 Bi 2 ) particles that are precipitated during extrusion together with the configured microstructure, and exhibits significantly improved strength and elongation compared to conventional magnesium extrusion materials without including rare earth metals.