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Finishing of aluminium based light weight materials - influence on surface properties

: Schubert, A.; Nestler, A.; Schmidt, T.; Schneider, J.

Postprint urn:nbn:de:0011-n-1416468 (3.3 MByte PDF)
MD5 Fingerprint: fcbb5cb6d9c02da1d4a3950108708a82
Created on: 2.6.2011

Neugebauer, Reimund ; Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik -IWU-, Chemnitz:
Sustainable production for resource efficiency and ecomobility : Manufacturing Colloquium, September 29-30, 2010 Chemnitz; ICMC 2010
Zwickau: Verlag Wissenschaftliche Scripten, 2010 (Berichte aus dem IWU 54)
ISBN: 978-3-942267-04-5
International Chemnitz Manufacturing Colloquium <2010, Chemnitz>
Conference Paper, Electronic Publication
Fraunhofer IWU ()
aluminium; turning; diamond; surface integrity

Aluminium based materials gain in importance for light weight components, but the increasing demands for better properties often require the use of special alloys or composites. Furthermore, specific surface properties are necessary in order to ensure the proper functioning. During the investigation it was found that the grain size in the surface layer of hypoeutectic AlSi alloys can be reduced by machining with modified cutting edge tools. The microstructure of the AlSi alloys has high potential for reducing the running-in time of motor components. Another challenge described in the paper is the precision machining of particle reinforced aluminium matrix composites. It was found that the surface roughness can be improved when using tools with appropriate chip breakers and a specially designed corner geometry. In addition forming of micropores could be reduced by using tools with a smaller corner radius, which leads to higher compressive stresses in the surface layer during cutting. All tests were carried out with diamond tipped inserts on a precision lathe with emulsion as the cooling lubricant.