Determination of the Rheological Parameters of Superplasticity from the Results of Bulge Tests

Abstract

Method for determination the material constants of superplastic aluminum alloys from the results of bulge tests is developed. The influence of entry radius is taken into consideration when developing a simplified analytical model of the process under consideration based on main assumptions of thin shell theory. Finite element modeling of the process is implemented using ANSYS-code. The experimental data on superplastic bulge forming of the commercial aluminum alloy AMg6 are used to verify the suggested procedure. It is shown that the deviation of the experimentally measured forming duration from corresponding calculated model value does not exceed 0.3%.