Generation of predefined surface characteristics by metal cutting finishing of AMCs
01/2006 to 12/2013
|Project executing organisation:||
Deutsche Forschungsgemeinschaft (German Research Foundation)
|Head of the subproject:||
Prof. Dr.-Ing. Andreas Schubert
Dipl.-Ing. Andreas Nestler
Aluminium matrix composites (AMCs) are innovative light weight materials which are intented to be used for reliable components. AMCs consist of a relatively soft aluminium alloy as parent material and hard particles embedded therein. Machining of these materials constitutes an especial challenge. Due to the hardness of embedded particles tools wear out very fast on the one hand, while particles are ripped out of the matrix and leave near-surface holes, which might be initial points for the formation of cracks, on the other.
In metal cutting finishing of AMCs the surface is intented to be damaged as little as possible. An approach consists in cutting the hard ceramic particles with a size of only few micrometers without changing their position in the aluminium matrix. This requires the use of especially hard cutting tools. It is necessary to investigate if besides diamond cemented carbides are applicable. Due to the fact that diamond begins to oxidise in the air at a temperature of approximately 600 °C, the investigation into different coolant strategies will be useful in this context.