INFLUENCE OF EXTRUSION PROCESS PARAMETERS ON THE MECHANICAL PROPERTIES OF Al-Li-EXTRUSIONS

The influence of the extrusion process parameters and TMT on the mechanical properties of different Lital A (8090)-extrusions was investigated. Strength was shown to be influenced less by extrusion temperature and ratio than by the extrusion aspect ratio (width/thickness) determining texture. With increasing extrusion aspect ratio the strength declines considerably. Depending on the homogeneity of slip distribution the strength decrease can be calculated with excellent accuracy by the SACHS- or the TAYLOR-model on the basis of a quantitative texture analysis