Abstract
A commercial AZ31 magnesium alloy sheet was tested under uniaxial tension, uniaxial compression and proportional biaxial tension. Bulge tests were also carried out to evaluate the plastic deformation behavior of the material over a larger plastic strain range than that obtained from biaxial tension experiments. The contours of plastic work and the directions of plastic strain rates were determined from experimental data and compared with those calculated using Cazacu 2004 yield criterion. It was found that Cazacu 2004 yield criterion can describe the asymmetry of the yield locus very well, while the measured plastic work contours other than those used as input parameters were in fair agreement with the calculated yield locus. The calculated directions of plastics train rates were found generally in good agreement with those measured except for stress ratios :σ x σ y =1:0 and 4:1.
