Hot deformation behavior, processing map, and microstructural evolution of Mg-Zn-Zr magnesium alloy.

The hot compression in the deformation temperature range of 523-673 K and strain rates of 0.001-1 s^-1 was aimed to study the hot deformation behavior, processing map, and dynamic recrystallization (DRX) to confirm an optimum hot working condition of Mg-Zn-Zr alloy. The strain-stress results by using the Gleeble-1500 simulator indicated that the flow stress decreases with increasing temperature or decreasing of strain rates, and the Medium Gaussian Kernel (correlation coefficient (R) = 0.9806, absolute relative error (AARE) = 3.28 %) has better predicting capacity. Based on the processing map and constitutive equation, the optimum hot-working condition for Mg alloys can be determined to be at hot compression temperature and strain rates in the range of 593-623 K and 0.01-0.001 s^-1 with a peak value of power dissipation efficiency (PDE) which is reaching to 37 %. [ABSTRACT FROM AUTHOR]