Optimization of Extrusion Temperature for Vanadium-containing Magnesium Alloy for Automobiles

In this paper,the vanadium-containing magnesium alloy Mg-8 Al-1 Zn-0.5 V used for automobiles was extruded at different temperatures,and the mechanical properties and microstructure of the samples were tested and analyzed.The results show that with the extrusion temperature increasing from 300 ℃ to 425 ℃,both of the tensile strength and yield strength of the alloy samples increase first and then decrease,and the specific elongation coupled with the average grain size of the samples decrease first and then increase,with both of the microstructure and mechanical properties of the samples improved.Compared with those of the sample at 300 ℃ of the extrusion temperature,the tensile strength and yield strength respectively increase by 13.38% and 14.57% with the specific elongation and average grain size separately decreased by 2.3% and 18.11% for the sample extruded at 375 ℃.The optimum extrusion temperature for the vanadium-containing magnesium alloy Mg-8 Al-1 Zn-0.5 V is determined at 375 ℃.