Microstructure and thermal plasticity of AZ31 magnesium alloy extruded tube

The microstructure performance,mechanical behaviors and the subsequent changes of magnesium alloy AZ31 tube extrusion under high temperature and room temperature were studied.Under room temperature,for magnesium alloy tube,the yield intention,tensile intention and elongation ratio were respectively 190 MPa,280 MPa and 17%.Under 400 ℃ high temperature,the yield intension and tensile intension are 25 MPa approximately and elongation ratio is 180%.Through analyzing the law of influencing on mechanical behaviors of Mg tube by extrusion deformation,it is concluded that with the increasing of deformation,the mechanical behavior values of magnesium alloy also increase.In addition,the proper technical parameters of tube extrusion of magnesium alloy were determined.