Effect of Process Parameters of Semi-solid Die Casting on Fatigue Property of Magnesium Alloy for Automobile
AZ91D magnesium alloys for automobile were produced by semi-solid die casting with different process parameters, and the microstructure, phase composition and fatigue property were tested. The results show that appropriate process parameters of semi-solid die casting could refine the microstructure of AZ91D alloys for automobile by semi-solid die casting and improve its fatigue property. Moreover, when the injection speed is between 3.5 m/s and 8.5m/s and the injection pressure is between 15 MPa and 35MPa, the injection speed with 6.5m/s and injection pressure with 25MPa, can make the alloy obtain the best fatigue property.