摘要
The effects of didymium(Nd : Pr = 3 : 1 )on the microstructure and mechanical properties of Mg-10%A1 alloy were studied with the additions of 0~3%Di. The small block-like Al2(Nd,Pr) phase appears in 1%Di alloy, the blocklike Al2(Nd,Pr) and needle-like Al11(Nd,Pr)3 phases appear synchronously in 2%Di and 3%Di alloys, while the network of (Mg17Al12)βphase is broken up. The tensile properties can be improved with the addition of didymium. When the addition of didymium in Mg-10%A1 alloy reaches 2% , the alloy exhibits the best combination of strength and ductility, but the strength and ductility drop at the addition of 3% Di due to the obvious increase of the size and quantity of the needle-like Al11(Nd,Pr)3 phase.
基金
Project supported by the Science & Technology Bureau of Sichuan Province of China (04GG1589)
