A Novel Method for the Determination of High Temperature FLCs of ECAP-Processed Aluminum AA5083 Sheet Metal

In this study, investigations into the deformation behavior of aluminum AA5083 at elevated temperatures were carried out on a newly developed test rig. The rig was jointly with ZwickRoell GmbH & Co. KG (Germany) and is based Nakajima heated dies. way, statements can be made about lightweight potential alloy. Additionally, equal-channel angular pressing (ECAP) performed to process sheet metal. conventional ECAP mainly used for bulk material in laboratory use therefore often not suitable many industrial applications, especially large series. metal allows significant increase areas application. It documented that grain refinement achieved by severe plastic deformation. At room temperature primarily increases mechanical strength. Formability improved fine-grained materials, temperatures, which related diffusion-controlled mechanisms boundary sliding. advantages materials are thus also construction even optimize ECAP-route C provide most homogeneous microstructure possible (180° rotation around ECAP-axis after first pass). specimens taken from processed determine Forming Limit Curve (FLC) compared reference (four different specimen geometries). FLCs under (250 °C, 375 °C) novel bench. A special feature rapid heating avoid microstructural changes. Microscopic examinations study mechanisms. Differences forming fracture between alloy found.