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2019-01-01 - Article/Dans un journal avec peer-review - Anglais - 15 page(s)

Rachidi Rachida, Elkihel Bachir, Delaunois Fabienne , Deschuyteneer Dorian, "Effectiveness of phased array focused ultrasound and active infrared thermography methods as a nondestructive testing of Ni-WC coating adhesion" in Nondestructive Testing and Evaluation, 35, 2, 205-220

  • Edition : Taylor & Francis (United Kingdom)
  • Codes CREF : Chimie des surfaces et des interfaces (DI1327), Essais non destructifs (DI2832), Matériaux céramiques et poudres (DI2744), Métallographie (DI2330)
  • Unités de recherche UMONS : Métallurgie (F601)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Ingénierie des matériaux (CRIM)
Texte intégral :

Abstract(s) :

(Anglais) The substrate/coating adhesion is a crucial parameter conditioning the quality of coating and its durability in service. For this reason, an inspection of the coating integrity, in particular, the presence of adhesion defects will be of great importance. The adhesion inspection is usually ensured by destructive methods, such as traction, interfacial indentation, four-point bending, testing scratch, etc. However, it is currently hampered by the absence of a satisfactory non-destructive method. Among the non-destructive testing technologies widely used in the industrial field, there are X-ray diffraction, ultrasonic inspection, and infrared thermography. In this paper, two methods are investigated: ultrasonic inspection, which becoming more efficient, especially with the emergence of phased array systems that allow to investigate different inspection angles and focusing depths, and the active infrared thermography. Experiments were performed on metallic coatings deposited on a mild steel substrate. Coatings were containing artificial defects (flat bottom holes with different diameters) at the interface and others were exempts of defects. Longitudinal waves with specific delay laws were generated through a phased array contact transducer (5 MHz of central frequency). Experimental results show that the ultrasonic method allows detecting and sizing defects with a diameter of 1 mm located in thick coatings.


Mots-clés :
  • (Anglais) substrate/coating adhesion
  • (Anglais) non-destructive testing
  • (Anglais) defects
  • (Anglais) phased array
  • (Anglais) detection
  • (Anglais) Coating