Analysis of Flow Stress of AZ31B Wrought Magnesium at Elevated Temperatures

AZ31B is of the most widely use in wrought magnesium alloys. It is practical to study the flow stress to hot processing. The research on the flow stress in compression is conducted by test. The result shows that the flow stress is affected by the forming temperature and strain rate in compression at 573～723 K of temperature and 0.01～5 s -1 of strain rate, and rises by decreasing in temperature and increasing in strain rate . The relationship between the flow stress and logarithm of Zener-Hollomon parameter is linear. The relationship between the flow stress in compression of AZ31B magnesium alloy at elevated temperature and strain rate is described correctly by employing the form of exponent of Zener-Hollomon parameter.