Interpretation of Indications Generated by Small Welding Discontinuities in Ultrasonic Time of Flight Diffraction Technique

  • K. KaczmarekEmail author
  • R. Kaczmarek
  • J. Słania


The article presents results of research on non-destructive ultrasonic time of flight diffraction technique TOFD and metallographic examinations of selected cross-sections of a MAG welded joint. The main objective was to compare the results of TOFD and metallographic examination at the locations where a large number of point-like indications, located on specific depths, have been detected on TOFD images and analyse the impact of this type of indication on results of a welded joint evaluation. Considered, that the indications have not exhibited separations between upper and lower diffraction signals, because of their small heights, measuring of height of indications in those cases was impossible. In all cases, the occurrence of discontinuities of 0.16–0.78 mm in height, in locations indicated by TOFD has been confirmed.


Non-destructive testing Ultrasonic testing Time of flight diffraction 


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Authors and Affiliations

  1. 1.Institute of WeldingGliwicePoland
  2. 2.Czestochowa University of TechnologyCzestochowaPoland

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