In this study the constitutive equation of the superplastic AZ31 magnesium‐based alloy is modelled by the power law relationship between the stress, the strain and the strain‐rate and an accurate procedure for determining the constants of the material is presented. Moreover, the problem of optimizing the pressure‐time load curve of a free forming process is investigated and resolved by means of a pressure jump forming process. The experimental tests, carried out to support the finite‐element modelling, have shown good agreement between the numerical results and the experimental data.

Topics
Alloys, Materials forming, Materials synthesis and processing, Superplasticity, Finite-element analysis, Educational assessment, Public policy and governance
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© 2010 American Institute of Physics.
2010
American Institute of Physics
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