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How dry is dry? - A critical analysis of surface conditions used in dry metal forming
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00105947-1.pdf | 184.98 kB | Adobe PDF | View/Open |
Authors: | Maier, Hans Jürgen | Supervisor: | Vollertsen, Frank ![]() |
Other Authors: | Almohallami, A. Arghavani, M. Böhmermann, F. Freiße, H. Herrmann, M. Mousavi, S.A. Schöler, S. Scholz, P. Tenner, J. Teller, M. Umlauf, G. Wulff, D. Yilkiran, D. |
Abstract: | In the present study, the surface conditions of workpieces used for dry-metal forming experiments were analyzed. Spe-cifically, the effectiveness of different cleaning approaches was evaluated using x-ray photoelectron spectroscopy, in-frared spectroscopy and wetting experiments. The best cleaning results were obtained using a CO2-based approach. CO2 acts as an effective solvent and as a result of the mechanical impact, it removes material from the surface. In fact, clean-ing results were similar to those achieved by plasma cleaning. However, even simple cleaning with a towel and acetone left only a surface film of less than 100 nm. A residual oil film thickness below 100 nm on the work piece appears suf-ficient to mimic true dry-forming conditions in most cases. In order to determine cleanliness of surfaces used in dry-metal forming, an infrared spectroscopy-based oil film gauge along with a customized extended calibration curve turned out to provide for sufficiently accurate data. |
Keywords: | cleaning, coating, lubricant, spectroscopy, surface analysis | Issue Date: | 2017 | Journal: | Dry Metal Forming Open Access Journal | Start page: | 90 | End page: | 94 | Band: | 3 | Pages: | 5 | Type: | Zeitschriftenartikel | URN: | urn:nbn:de:gbv:46-00105947-10 | Institution: | Hochschule Bremen | Faculty: | Elektrotechnik und Informatik |
Appears in Collections: | Forschungsdokumente |
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