Modeling contact deformation of bare and coated rough metal bodies

R. Civiero, F. Perez-Rafols, L. Nicola*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The effect of the presence of a passivation layer on a metal rough surface during contact loading is investigated by means of dislocation dynamics simulations. The metal body is modeled as an FCC single crystal with a self-affine rough surface that is either bare, or covered by a thin coating, impenetrable to dislocations. This analysis permits to isolate the effect of surface roughening driven by dislocation motion: when the surface is bare the dislocations can glide out, leaving crystallographic steps at the surface that modify the local roughness; when the surface is passivated, dislocations are stopped by the interface.

Original languageEnglish
Article number104583
Number of pages8
JournalMechanics of Materials
Volume179
DOIs
Publication statusPublished - 2023

Keywords

  • Contact mechanics
  • Dislocation dynamics
  • Self-affine surfaces
  • Strain hardening

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