Effects of different extrusion processing parameters on microstructure and extrusion force of the Mg-6Al alloy were investigated by using a small extrusion die and electronic universal testing machine.The results indicate that

incomplete dynamic recrystallization can be obserevd in homogenized Mg-6Al alloy during extrusion under different conditions

and a part of the original microstructure is remained.Most of the recrystallized grains are nucleated at the boundaries of original grains and twins.With extrusion temperature increase

both the maximum value of extrusion force and the steady extrusion force are reduced.With the extrusion rate increase

difference between the maximum value of extrusion force and the steady extrusion force is increased.In addition

with the ratio of extrusion increase

the maximum value of extrusion force and the steady extrusion force is increased.