Comparison of Curvature and X-Ray Methods for Measuring of Residual Stresses in Hard PVD Coatings

Harri Lille; Jakub Kõo; Andre Gregor; Alexander Ryabchikov; Fjodor Sergejev; Rainer Traksmaa; Priit Kulu

doi:10.4028/www.scientific.net/MSF.681.455

Paper Titles

On the Measurement of Residual Stress in Induction Hardened Parts
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Strain Evolution during Mechanical Loading of the Magnesium Base Alloy LAE442 Studied by means of High Energy Synchrotron Diffraction
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Current Status of Engineering Materials Diffractometer at J-PARC
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Thermal Fatigue Study of Hardfaced Hot Forging Tool Using Numerical Analysis and Residual Stress Evaluation
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Comparison of Curvature and X-Ray Methods for Measuring of Residual Stresses in Hard PVD Coatings
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Advances on NDT Methods and Technologies for Early Stage Diagnosis of Materials
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Determination of Residual Stresses After Laser Remelting of Flame Sprayed Fe-Ni-Co-Mo Coating
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In-Situ Neutron Diffraction Study of the Deformation Behaviour of Two High-Manganese Austenitic Steels
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Generation of Residual Stresses and Improvement of Surface Integrity Characteristics by Laser Shock Processing
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HomeMaterials Science ForumMaterials Science Forum Vol. 681Comparison of Curvature and X-Ray Methods for...

Comparison of Curvature and X-Ray Methods for Measuring of Residual Stresses in Hard PVD Coatings

Abstract:

Physical Vapour Deposition and PVD coatings are designed for several applications, from industrial to biomedical. Residual stresses, arising during coating deposition, have important effect on the coating’s service life as their influence to the mechanical and tribological properties. Our aim was to investigate the residual stresses in five different PVD coatings (TiN, TiCN, TiAlN, TiAlN, nc-(AlTi) N/α -Si₃N₄) (presence of the Ti as adhesion layer) by the layer growing curvature method and the X-ray diffraction techniques using a plate and a strip as the substrate. Residual stresses were compressive and very large (2.98 - 7.24) GPa in all coatings and comparable in TiN, TiAlN, TiAlN coatings in the case of both methods. The magnitude of residual stresses is influenced by intrinsic strain in the case of layer growth rather than by thermal stress.