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Citation link: http://nbn-resolving.de/urn:nbn:de:gbv:46-00105947-10
00105947-1.pdf
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How dry is dry? - A critical analysis of surface conditions used in dry metal forming


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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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