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Multi-scale roughness transfer in cold metal rolling

Plouraboué, Franck and Boehm, Matthieu Multi-scale roughness transfer in cold metal rolling. (1999) Tribology International, vol. 32 (n° 1). pp. 45-57. ISSN 0301-679X

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Official URL: http://dx.doi.org/10.1016/S0301-679X(99)00013-4

Abstract

We report on a comparative Atomic Force Microscope (AFM) multi-scale roughness analysis of cold rolled Al alloy and steel roll, in order to characterize the roughness transfer from the steel roll to the workpiece in cold strip rolling processes. More than three orders of length-scale magnitudes were investigated from 100 microns to 50 nanometers on both types of surfaces. The analysis reveals that both types of surfaces are anisotropic self-affine surfaces. Transverse and longitudinal height profiles exhibit a different roughness exponent (Hurst exponent) z֊=0.93±0.03 and zʈ=0.5±0.05 Different length-scale cut-offs are obtained in each direction lsup=50mm, lsupՆ100mm. Height and slope distributions are also computed to complement this study. The above mentionned self-affine characteresitics are found to be very similar for the roll and the strip surfaces, which suggest that roughness transfer takes place from the macroscopic (100 µm) to the very small scale (50 nm).

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://dx.doi.org/10.1016/S0301-679X(99)00013-4
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Ecole Centrale de Lyon (FRANCE)
Other partners > Pechiney (FRANCE)
Laboratory name:
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Deposited By:Franck PLOURABOUE

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