To investigate the effects of extrusion temperature on the microstructure and mechanical properties of WE43 magnesium alloy, extrusion experiments were conducted under 330, 380, 430, and 450 °C, and the extrusion ratio was 16. The experimental results indicate that, at a low temperature of 330 °C, the alloy precipitates a large amount of second phases rich in Zr elements. Moreover, the texture strength and kernel average misorientation value are the highest, with values of 27.77 and 0.71, respectively. The increase in extrusion temperature leads to a gradual decrease in texture strength and kernel average misorientation value. The strength of the alloy is the highest at an extrusion temperature of 330 °C. Its tensile yield stress is 254.7 MPa and ultimate tensile strength is 302.7 MPa, respectively. As the extrusion temperature increases, the strength of the alloy gradually decreases. At an extrusion temperature of 450 °C, the tensile yield stress is 181.3 MPa and ultimate tensile strength is 265.7 MPa, respectively. The elongation first increases and then decreases, with an elongation of 20.9% at an extrusion temperature of 330 °C. At an extrusion temperature of 430 °C, the elongation reaches its maximum value, which is 23.6%. At an extrusion temperature of 450 °C, the elongation reaches its lowest value, which is 16.4%.
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