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Surface roughening of metal-polymer systems during uniaxial plastic deformation

Published online by Cambridge University Press:  01 February 2011

R. van Tijum ,
W.P. Vellinga  and
J.Th.M. De Hosson
R. van Tijum
Affiliation:
Department of Applied Physics, Materials Science Centre and the Netherlands Institute for Metals Research, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
W.P. Vellinga
Affiliation:
Department of Applied Physics, Materials Science Centre and the Netherlands Institute for Metals Research, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
J.Th.M. De Hosson
Affiliation:
Department of Applied Physics, Materials Science Centre and the Netherlands Institute for Metals Research, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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Abstract

In this paper we present model calculations of the deformation of a glassy polymer film supported by a plastically deforming metal substrate. The focus is on the resulting roughening of the free polymer surface. In the calculations a mixed-mode rate independent cohesive zone has been employed as the interface between the metal and the polymer. The mechanical behavior of the polymer is characterized by an elastic regime, a softening regime and finally a hardening regime. Above the yield point of the polymer shear bands occur that transfer the evolving roughness of the deforming metal through the polymer coating. It turns out that in this regime the resulting rms roughness at the free polymer surface may be higher than that of the underlying metal substrate. For this to occur the thickness of the coating must be higher than the correlation length of the rough metal substrate.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 882: Symposium EE – Linking Length Scales in the Mechanical Behavior of Materials , 2005 , EE3.2
Copyright
Copyright © Materials Research Society 2005

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References

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