Development of Forming Limit Diagram Via High Strain Rate Method on Aluminum by using Electrohydraulic Forming Process 061lloy 6A

Electrohydraulic forming is a pulsed metal forming process that uses the discharge of electrical energy across a pair of electrodes submerged in fluid to form sheet metal. An experimental procedure was developed to quantify the formability in electrohydraulic forming (EHF) that is consistent with the quasi-static formability assessment convention. Furthermore, we investigate the procedure to comparison of theoretical forming limit diagram and experimental results. The experimental EHF forming limit diagram (FLD) was determined for aluminum alloy sheet and circle grids used to determine the minor and major strain in the path of necking on the specimens. Not only good agreement was found between the experimental curve that derived by quasi-static tests and theoretical forming limit curve, but also EHF on aluminum alloy shows formability improvement on major strains including 26% in comparison to low strain rate process.