The semi-solid tensile deformation behavior of wrought AZ31 magnesium alloy

摘要

The semi-solid tensile deformation behavior of wrought AZ31 magnesium alloy has been studied through applying a set of low strain rate (0.001 s~(-1)) hot tension tests at temperature range of 300-500 ℃. The results indicated a ductility drop at ～450 ± 25 ℃. This was attributed to the occurrence of eutectic reaction (L → α + γ) and the partial melting of intermetallic y phase. The ductility was started to improve by increasing the temperature to 500 ℃. The latter was explained considering the effect of liquid phase on stress relaxation through accommodation of the grain boundary sliding phenomena. To further investigating the semi-solid tensile deformation behavior of the experimental alloy, the cavitations characteristics of the alloy were also examined.