Evaluation of the formability of AA2198-T3 Al-Li alloy in warm sheet hydroforming

This study aims to investigate the formability of AA2198-T3 Al-Li alloy in hydro-mechanical deep drawing (HMDD), through experimentation and finite element simulation. The effects most critical factors were studied: die cavity pressure forming temperature; temperature is selected at 298K 423K. Gurson?Tvergaard?Needleman model (GTN model) was employed analyze predict fracture hydroforming a cylindrical part. Both numerical experimental results showed that increase inside liquid chamber, within certain range, contributes improve alloy. Increasing would reduce required for sheet hydroforming. Notably, appropriate chamber beneficial form good quality parts with relatively uniform wall thickness. By analyzing morphologies, brittle plays main role room temperature, but ductile shown elevated temperature.