Abstract
Abstract
The study focuses on the anisotropic-asymmetric behaviour of an Mg-Gd-Y alloy at the temperature range of 25∼300 °C. The mechanical experiments were carried out, including the uniaxial tension and compression specimens along rolling direction (RD), diagonal direction (DD), and transverse direction (TD). The deformation behaviour of all specimens was recorded through adopting the digital image correlation technology, obtaining the corresponding force-stroke curves. It is obviously seen that the variation of true stress-plastic strain curve is related with the coupling effect of temperature and strain. The Mg-Gd-Y alloy possesses the remarkable tension-compression asymmetry and anisotropy under various temperatures. A SVT model is proposed to characterize the temperature-related plastic flow behaviour under various loading condition. The evolution of yield loci at different equivalent plastic strain levels and temperatures of the Mg-Gd-Y alloy is accurately characterized by the A-Yoon2014.