Articles | Volume 9, issue 1
https://doi.org/10.5194/jsss-9-157-2020
https://doi.org/10.5194/jsss-9-157-2020
Regular research article
 | 
15 May 2020
Regular research article |  | 15 May 2020

Measurement of the Beruforge 152DL thin-film lubricant using a developed thin-film thickness standard

Sebastian Metzner, Tamara Reuter, and Tino Hausotte

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Short summary
For the determination of the refractive index of the lubricant used in the sheet-bulk metal forming process, a lubricant thin-film thickness standard was developed which represents a continuous measuring range from 6 to 100 μm. To determine the refractive index, the thin-film thickness standard was measured with a coaxial interferometric measurement system in various thickness ranges. The results show changing optical properties with increasing layer thickness.