Effect of Solution Pressure on Microstructure of AM60 Magnesium Alloy

As-cast AM60 magnesium alloy was solid dissolved for 40 min at 450 °C under different pressures, atmospheric pressure, 3, 4 and 5 Gpa. The microstructure of the products was characterized by optical microscope and X-ray diffraction. The results show that increasing solution pressure promotes the fracture and dissolution into the α-Mg matrix of the coarse β-Mg17Al12 phase distributed along the grain boundary with a network appearance.