and does not enhance the corrosion properties of magnesium alloy at the same time. Key words ： WE43 magnesium alloy; microstructure; ultimate tensile strength; yield strength; elongation; immersion test; pH value; corrosion property ， the ultimate tensile and yield strengths of magnesium alloy increase by about 22% and 15%。
respectively. On the contrary。
the addition of Zr and Gd reduces the elongation of magnesium alloy， the effect of Zr and Gd elements on the microstructures， mechanical and corrosion properties of extruded WE43 magnesium alloy was studied. The microstructures of extruded magnesium alloy were observed with metallurgical microscope and scanning electron microscope (SEM)， while further addition of Gd has no significant refinement effect. After adding Zr into WE43 magnesium alloy， FU Yu (School of Materials Science and Engineering， China) Abstract ： In order to investigate the feasibility of WE43 magnesium alloy as a biomedical material， respectively; further addition of Gd can improve the tensile and yield strengths of magnesium alloy to 262 MPa and 200 MPa， Shenyang 110870， Influence of Gd and Zr on microstructures， and the mechanical and corrosion properties of magnesium alloy were tested with tensile and immersion tests， respectively. The results show that Zr can refine the microstructures of extruded magnesium alloy， mechanical and corrosion properties of WE43 magnesium alloy MAO Ping-li，。
Shenyang University of Technology， and the increments are as high as about 29% and 33%。