The interfacial indentation test to determine adhesion and residual stresses in NiCr VPS coatings
| Autor: | Jacky Lesage, G. Marot, M. Hadad, Mariana Staia, S. Siegmann, Ph. Démarécaux |
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| Přispěvatelé: | Laboratoire de Mécanique de Lille - FRE 3723 (LML), Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lille, Sciences et Technologies-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2008 |
| Předmět: |
Toughness
Materials science Interfacial indentation NiCr Residual stress 02 engineering and technology engineering.material 01 natural sciences Coating Indentation Thermal spray coatings 0103 physical sciences Ultimate tensile strength Materials Chemistry Composite material Thermal spraying 010302 applied physics Surfaces and Interfaces General Chemistry Adhesion 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films engineering Direct shear test 0210 nano-technology |
| Zdroj: | Surface and Coatings Technology Surface and Coatings Technology, Elsevier, 2008, 202 (18), pp.4411-4416. ⟨10.1016/j.surfcoat.2008.04.018⟩ |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2008.04.018 |
| Popis: | The interfacial indentation test allows determining the interface toughness of a coating obtained by thermal spraying. During this test, a Vickers indentation is carried out on a cross-section of the sample. A crack is initiated and propagated along the interface. An analytical model allows defining an interface toughness representing the coating adhesion. The objective of this study is to compare this test with other tests (tensile adhesive test, shear test) and to specify its applicability. The residual stresses are also estimated by two different methods. Their influence on adherence is discussed in a third part. Those experiments were conducted on NiCr 80-20 VPS coatings with different thicknesses and roughnesses. In particular, it is shown that the interfacial indentation test is the most universal one and that compressive residual stresses improve coating adhesion. |
| Databáze: | OpenAIRE |
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