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Evolution of Deformation Induced Surface Morphologies Generated in Fe-based Sheet

Published

Author(s)

Mark R. Stoudt, Joseph B. Hubbard, Stephen W. Banovic

Abstract

The complex strain states that exist within a real metal stamping are likely to generate different surface morphologies when compared to the same level of plastic strain produced via single pass deformation. This study quantifies the surface morphology that develops when an as-received traditional plain carbon steel sheet is deformed under two different, single-pass stretching operations. Roughness measurements performed in the as-received condition with a high resolution scanning laser confocal microscope revealed that an initial surface roughness did not appear to influence the deformation generated with biaxial strain. However, the initial surface roughness could have affected the deformation generated with uniaxial strain. The roughness data were fitted to a probability density function (PDF) and resulted in a near-ideal Gaussian distribution of the surface profile heights. This analysis revealed that the shape of the PDF curve changes monotonically with surface roughness and plastic strain and that the accuracy of the rms roughness (Rq) parameter strongly depends on the quality of the Gaussian fit.
Citation
Transactions of the S.A.E.
Volume
113-5

Keywords

Gaussian distribution, scanning laser confocal microscopy, strain path-dependent deformation, surface roughening

Citation

Stoudt, M. , Hubbard, J. and Banovic, S. (2005), Evolution of Deformation Induced Surface Morphologies Generated in Fe-based Sheet, Transactions of the S.A.E. (Accessed February 20, 2024)
Created March 1, 2005, Updated February 17, 2017