| Abstract Scope |
Mg-Zn-Y alloy containing LPSO phase is a new type of high strength magnesium alloy system, and its electrically-assisted deformation behavior has not been reported. The electrical-assisted tensile tests of Mg98.5Zn0.5Y1 alloy sheets were carried out at different temperatures, current densities, duty ratios, and frequencies. The experiment results showed that, with the increase of current density, the peak stress of the alloy decreased. It is noticeable that the changes of duty ratios and frequencies have a little effect on the peak stress and strain. According to the experimental results, the Arrhenius model were derived based on the Zener-Hollomon parameter. Moreover, the constitutive equation of electro plastic effect coupling with temperature and pulse current parameters was established by introducing electrically-assisted characteristics. By comparing the experimental and predicted values, the established model can effectively predict the variation trend of flow stress under electrically-assisted deformation. |