Modeling contact deformation of bare and coated rough metal bodies
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, TU Delft - Team Marcel Sluiter)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
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.
help_outline