Coextrusion of Mg-Al macro composites

Abstract In this study extrusion experiments were carried out in order to investigate and develop the coextrusion process for light weight magnesium–aluminum macro composites. Seamless tubes were extruded using hybrid billets combining EN AW-6060 tubes as coating material and various Mg-alloys (ZM21, AZ31, AS11, AM10, AM30 and AM50) as core material. Further AZ31/EN AW-6060 rods were produced to investigate the influence of the die angle and different combining techniques of Mg-core and Al-sleeve on the diffusion layer formation. Additionally the effect of mechanically interlocked fittings and a Zn-foil as interlayer material on the coextrusion process and products were examined. For characterization of the compound's shear strength push-out tests were performed.

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