Effect of Pouring Temperature on Microstructures and Mechanical Properties of Mg-5Al-0.5Y-0.5Nd Alloy
The effect of pouring temperature on the microstructure and mechanical properties of as-cast Mg-5Al-0.5Y-0.5Nd alloy was studied. The results show that with the increase of pouring temperature, the size and amount of the Mg17Al12 phase with fish-born shape on the grain boundry reduce, then the morphology of fish-born shape Mg17Al12 phase disappears and spot particles or granular particles are dispersed on the boundry. The rare earth compound Al2Y and Al2Nd increase, and the fine and disperse Al2Y and Al2Nd evolve into nodular ot columnar. The tensile strength, elongation and density of alloys decrease.