One objective of the project "Austrian Light Weight Structures (ALWS)" is a basic study of production, modelling and validation of roll bonded composites of AA6xxx-automotive alloy and IF-steel. In this context, the influence of surface preparation, pre-heating temperature of aluminium and steel sheet, and post-heat treatment on the bond strength of the composites is analysed by shear tests and reverse bend tests. Furthermore, the interface region is investigated by micro-hardness tests and metallographic observations.

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In order to understand the tribological processes and interactions in the tool-workpieceinterface systematically, basic experiments that allow an independent variation of influencing parameters are necessary. The ring-on-disc test is a popular model experiment that is often used in tribological analyses at low normal contact pressures.The scope of the paper is an analysis of the applicability of the ring-on-disc test for high normal pressures as used in forging processes, using aluminium AA6082 as workpiece material. It turned out, that this test is a convenient method to measure friction under forging conditions.