In the present research, the Sb-alloying method was adopted, and the grain re finement and tensile properties of as-cast Mg-10Zn-5Al alloys with varying Sb addition were investigated.The results showed that with the S...In the present research, the Sb-alloying method was adopted, and the grain re finement and tensile properties of as-cast Mg-10Zn-5Al alloys with varying Sb addition were investigated.The results showed that with the Sb addition, a new phase (Mg3Sb2) of high melting point forms in the alloy beside the α-Mg matrix, τ-Mg32(Al, Zn)49 phase and φ-Al2Mg5Zn2 phase.With an appropriate amount of Sb addition, the morphologies of the secondary phases and the matrix are changed and the grains are refined.When Sb addition is 0.6wt.%, both ambient and high temperature tensile strengths of the alloy reach their maximum.The hardness of the alloy increases with the increasing of Sb addition.With proper addition of Sb, the tensile failure mode of the alloy changes from cleavage fracture to quasi-cleavage fracture, showing good enhancement effect.展开更多
基金supported by the National Natural Science Foundation of China (NO.50571073)Natural Science Foundation of Shanxi Province (NO.2009011028-3,20051052)High School Student Project of Taiyuan City (07010713)
文摘In the present research, the Sb-alloying method was adopted, and the grain re finement and tensile properties of as-cast Mg-10Zn-5Al alloys with varying Sb addition were investigated.The results showed that with the Sb addition, a new phase (Mg3Sb2) of high melting point forms in the alloy beside the α-Mg matrix, τ-Mg32(Al, Zn)49 phase and φ-Al2Mg5Zn2 phase.With an appropriate amount of Sb addition, the morphologies of the secondary phases and the matrix are changed and the grains are refined.When Sb addition is 0.6wt.%, both ambient and high temperature tensile strengths of the alloy reach their maximum.The hardness of the alloy increases with the increasing of Sb addition.With proper addition of Sb, the tensile failure mode of the alloy changes from cleavage fracture to quasi-cleavage fracture, showing good enhancement effect.
