1. Modeling contact deformation of bare and coated rough metal bodies
- Author
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R. Civiero, F. Perez-Rafols, L. Nicola, Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, and Universitat Politècnica de Catalunya. RIIS - Grup de Recerca en Recursos i Indústries Intel·ligents i Sostenibles
- Subjects
Dislocation dynamics ,Deformacions (Mecànica) ,Metalls -- Superfícies ,Metals -- Surfaces ,Dislocation dynamics, Contact mechanics, Self-affine surfaces, Strain hardening ,Contact mechanics ,Deformations (Mechanics) ,Enginyeria mecànica [Àrees temàtiques de la UPC] ,Self-affine surfaces ,Mechanics of Materials ,Metal crystals ,General Materials Science ,Cristalls metàl·lics ,Instrumentation ,Strain hardening ,Mecànica de contacte - 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. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 681813).
- Published
- 2023