Leichte Turbolader-Verdichterräder aus Aluminium- und Magnesium-Feinguss

Within the scope of a team work between Kühnle, Kopp & Kausch AG, VW AG, Sterling International Technologies and the Fraunhofer Institute for Strength of Structures under Operational Conditions LBF compressor wheels of aluminium and magnesium investment casting were developed and tested. Strength and fatigue tests, overspeed and field tests as well as metallographic checks were made in addition to the finite element calculations to optimize the stress under centrifugal force in an appropriate way for the materials involved. The results and the knowledge gathered are to clarify whether magnesium alloys are an appropriate replacement for the proven standard aluminium alloy for turbochargers.