Nanotopography characterisation in microforming
Weidel S, Engel U, Geiger M (2007)
Publication Type: Conference contribution
Publication year: 2007
Publisher: Euspen Verlag
Book Volume: 1
Pages Range: 361-364
Conference Proceedings Title: Proceedings of the 7th International Conference of the European Society for Precision Engineering and Nanotechnology Euspen, Bremen
Event location: Bedford
ISBN: 0955308224
Abstract
In microforming applications the contact state between the tool and a lubricated workpiece differs significantly from that of a forming process in conventional length scale. The drastic reduction of the lateral dimensions of the workpiece surfaces in microforming, while there is no change in surface roughness, causes a significant reduction of the number of asperities contacting the tool. Therefore, the influence of single asperities on the tribological behaviour of the surface increases. Thus, the assumption that a complete flattening of the regions on top of the asperities contacting the tool takes place during forming can not be maintained. Instead, the socalled nanotopography on top of the flattened asperities has to be investigated. The relationship between these contact regions, the lubricant and the impact on the tribological behaviour has not been analysed yet. In this paper the flattening behaviour of single idealised asperities is analysed. A test rig for surface flattening is introduced, which enables the in-situ observation of the developing contact area with a translucent tool, a telecentric objective and a CCDcamera. Upsetting tests are performed with and without lubricant. The nanotopography and its behaviour during flattening is characterised by confocal microscopy and scanning probe microscopy.
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APA:
Weidel, S., Engel, U., & Geiger, M. (2007). Nanotopography characterisation in microforming. In Thornett, E. (Eds.), Proceedings of the 7th International Conference of the European Society for Precision Engineering and Nanotechnology Euspen, Bremen (pp. 361-364). Bedford, GB: Euspen Verlag.
MLA:
Weidel, Stephan, Ulf Engel, and Manfred Geiger. "Nanotopography characterisation in microforming." Proceedings of the Proceedings of the 7th International Conference of the European Society for Precision Engineering and Nanotechnology Euspen, Bremen, Bedford Ed. Thornett, E., Euspen Verlag, 2007. 361-364.
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