439 Mechanical and Fatigue Properties and Metal Flow Simulation of Magnesium Alloy Die Castings

Abstract

Mechanical and fatigue properties of magnesium alloy die castings AZ91D and AM60B are investigated by tensile test, fracture toughness test and fatigue crack propagation test. It is obtained the tensile strength and 0.2% proof stress of AZ91D is better than AM60B. The fracture toughness of AM60B is better than AZ91D. The fatigue properties of AZ91D and AM60B are almost the same in all area. The direction of metal flow doesn't affect every characteristic. Metal flow and solidification during casting process is examined by FEM simulation method.