In this paper, thixoforging of a magazine plate made of AZ91D magnesium alloy were
investigated by means of numerical simulation and experiments. Numerical simulation results show
that with increasing punch displacement, local bending, formation of a concave shell part and bulk
plastic deformation occurs in billet continuously. Equivalent strain and stress increase and the
temperature of the semi-solid billet decreases. When the temperature of the semi-solid billet or the
die temperature is elevated, equivalent stain and stress decrease. Optimal technological parameters
such as a billet temperature of 545°C, die temperature of 450°C and punch velocity of 15 mm/s
were obtained by numerical simulation. Experimental results demonstrate that magazine plates with
high mechanical properties such as tensile strength of 316.8 MPa, yield strength of 228.3 MPa and
elongation of 12.6 % can be manufactured successfully when the optimal technological parameters
selected according to the results of numerical simulation are applied.
