MODELING AND SIMULATION OF MECHANICAL PROPERTIES OF MAGNESIUM ALLOY WHEEL CASTING FOR AUTOMOBILE

摘要

A mechanical property model for predicting the strength of cast magnesium alloy AZ91D has been established based on the strengthening mechanisms of the alloy such as solid solution strengthening, grain boundary effect, Orowan looping, and dispersion hardening. By using the model, the strength distribution of an automobile wheel casting was simulated, in which the thermal history data obtained by simulating the mold filling and solidification processes were adopted. Metallographical observation and tensile property test were carried out and the simulated results were compared with the experimental results for evaluating the model.