Microstructure development of extruded Mg alloys

摘要

In order to obtain light-weight constructions in the automobile and aircraft industry the extrusion of magnesium profiles is an important factor. Magnesium profiles of the AZ alloy family have been extruded in the direct, indirect and hydrostatic extrusion method at the Extrusion Research and Development Center (ERDC) of the Technical University of Berlin. These profiles were then analyzed at the Institute for Materials Science and Technology of the Technical University of Berlin for their microstructure. Not surprisingly the different samples exhibited a different microstructure as well as different mechanical properties. Some of these samples were taken to another deformation after the extrusion process and then also tested for their microstructure and mechanical properties. The following paper will discuss the difference in the extrudates coming from the direct/ indirect and hydrostatic extrusion as well as the extrudates which were further deformed in order to optimize the mechanical properties.