Extrusion process and property of AZ31 magnesium alloy

The microstructure and mechanical properties of extruded AZ31 magnesium at different extrusion temperature were investigated. The results show that, at 380 ℃, when the extrusion ratio is 23, the AZ31 magnesium alloy has a dense recrystallized microstructure and good mechanical properties. On one hand, if the extrusion ratio is too small, grain crushing effect is not obvious, and part of the grain is not dynamic recrystallization. On the other hand, larger extrusion ratio can lead to grain growth and banded structure.Tensile fracture characteristics of extruded AZ31 magnesium alloy is quasi-cleavage.