Influence of Aging Treatment on Microstructure and Mechanical Properties of AZ80 Alloy

The aging treatment at different temperature for AZ80 Mg alloy after squeezing was carried out. The changes of microstructures and mechanical properties were studied. The reason and the effect of aging temperature on mechanical properties and microstructure of AZ80 Mg alloy were analyzed. The results show that when the aging temperature goes to 170 ℃, the speed of second phase decomposition and precipitation is speeding up. The distribution of precipitated phase gets uniform, thin precipitated phase distributes on grain boundary in dispersed states, the secondary Mg17Al12 precipitate the most and a majority of them is exiguous sheets, the component is uniform, it makes the mechanical properties of materials get best.