On the High Temperature Compressive Flow Behavior of Mg-۴Sn Magnesium Alloy

Hot Workability and Processing Map of High Gd Content Mg-Gd-Zn-Zr-Nd Alloy Hot deformation behavior of homogenized Mg-۴Sn binary alloy was studied using compression tests at the temperature range of ۳۰۰-۵۰۰  and strain rates of ۰.۰۰۱-۱s-۱. The material showed typical single peak flow behavior followed by a steady state flow as a plateau, which is more evident at the high value of Zener-Hollomon parameter. Constitutive analysis showed that in spite of the original Johnson-Cook (J-C), conventional strain compensated Arrhenius model based on Sellars-McTegart model has a reasonable agreement with the experimental data. Moreover, the well-known hyperbolic sine function fits the experimental data for predicting of the peak stress with a fair degree of accuracy.

Keywords:

Magnesium alloys , Microstructure , Hot deformation , Constitutive model