MODELING HIGH TEMPERATURE FLOW BEHAVIOR OF AN AL 6061 ALUMINIUM ALLOY

Hot deformation behavior of a medium cr/mn al6061 aluminum alloy was studied by isothermalcompression test at temperatures range of 320 to 480 °c and strain rates range of 0.001 to 0.1 s?1. the true stresstruestrain curves were analyzed to characterize the flow stress of al6061. plastic behavior, as a function of bothtemperature and strain rate for al6061, was also modeled using a hyperbolic sinusoidal type equation. for differentvalues of material constant ? in the range of 0.001 to 0.4, values of a, n and q were calculated based on mathematicalrelationships. the best data fit with minimum error was applied to define constitutive equation for the alloy. thepredicted results of the proposed model were found to be in reasonable agreement with the experimental results, whichcould be used to predict the required deformation forces in hot deformation processes.