EFFECT OF RESIDUAL STRESS ON LOAD BEARING CAPACITY OF PVD COATED SURFACES

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EFFECT OF RESIDUAL STRESS ON LOAD BEARING CAPACITY OF PVD COATED SURFACES

Journal Title: Tribologia - Year 2018, Vol 280, Issue 4

Abstract

The article presents the results of spherical indentation modelling of coating-substrate systems. Modelling was carried out using the finite element method. First of all, the effect of the coating thickness on system deformation and stress distribution was taken into analysis, assuming coating thicknesses of 1, 2, and 5 μm, which are typical for tribological applications as well as models with infinitely thick coating and without a coating. The evolution of maximum radial stresses in the indentation within 0 to 3N load is presented. A significant effect of the coating thickness on the value and location of the maximum stress concentration was observed. The effect of internal stresses on surface bearing capacity with PVD coatings was also analysed. The paper presents the possibility of creating failure maps of coating–substrate systems for the assumed mechanical properties of materials, which allows one to determine the load capacity of coated surface or choose the optimal coating thickness when the maximum strength and contact geometry are known.<br/><br/>

Authors and Affiliations

Kinga CHRONOWSKA-PRZYWARA, Marcin KOT

Keywords

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EP ID EP413440
DOI 10.5604/01.3001.0012.7481
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