The Effect of Aging Treatment on Mechanical Properties of AA6082 Alloy: Modeling and Experiment

A novel constituti ve equation has been proposed to predict the effect of aging treatment on mechanical properties of aa6082 aluminum alloy. considering that aging phenomenon affects the distribution of alloying element in matrix, and the fact that different distribution of alloying elements has different impediments to dislocation movement, a material model based on microstructure, has been developed in this research. a relative volume f raction or mean radius of precipitat ions is introduced into the flow stress by using the appropriate relationships. the ga-based optimization techniqu e is used to evaluate the material constants within the equations from the uni-axial tensile test data of aa6082 alloy. finally, using the proposed model with optimized constants, the flow behavior of the alloy at different conditions of heat treatment is predicted. the results predicted by the model showed a good agreement with experimental data, indicating the capability of the model in prediction of the material flow behavior after different heat treatment cycles. also, the calculated fl ow stress was used for determination of the material property in abaqus software to analyze the uniaxial compression test. the force- displacement curves of the analys is were compared to the expe rimental data obtained in the same condition, and a good agreement was found between the two sets of results.