Abstract The mechanical behaviors at elevated temperatures of aluminum alloys produced by squeeze casting process were studied using the physical simulation system Gleeble-1500D. A series of true stress-strain curves under temperatures ranging from 300℃ to 500℃ and strain rates ranging from 0.001s-1 to 0.1s-1 were obtained for the materials produced under different squeeze pressures (25MPa, 50MPa and 75MPa). Based on the experimental results, an elastic-viscoplastic constitutive model for describing the stress-strain relationship before and in the steady flow state was developed, and the mathematic expressions of several key model parameters were given. It is shown that the predictions of the model are in good agreement with the experimental data.
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