Modeling contact deformation of bare and coated rough metal bodies

Journal article (2023)

Authors

R. Civiero Università degli Studi di Padova
Francesc Pérez-Ràfols Universitat Politecnica de Catalunya, Università degli Studi di Padova
L. Nicola Università degli Studi di Padova, Team Marcel Sluiter - Mechanical, Maritime and Materials Engineering
Research Group
Team Marcel Sluiter (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2023 R. Civiero, F. Perez-Rafols, L. Nicola
DOI: https://doi.org/10.1016/j.mechmat.2023.104583
More Info
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Published Date

2023

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Marcel Sluiter

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.