NDT.net - October 1998, Vol.3 No.10

Table of Contents ECNDT '98

Session: NDT of Welds

Critical Assessments of the TOFD Approach for Ultrasonic Weld Inspection

A. Erhard, E. Schulz, G. Brekow, H. Wüstenberg
Bundesanstalt für Materialforschung und -prüfung
P. Kreier
Innotest AG, Eschlikon CH

*Corresponding Author Contact:
Federal Institute of Materials Research and Testing, Laboratory VIII.4, D-12205 Berlin, Tel. + 49 (0) 8104-0, Fax + 49 (0) 8112029; Anton.Erhard@bam.de; http://www.bam.de/a_viii/g3viii40.html



Experiments using the TOFD - technique

Comparison of the results: TOFD and 45° shear wave technique



  1. F.H. Dijkstra, T. Bouma, Inspection of complex geometries with Time-of-Flight Diffraction, 14th International Conference on NDE in the Nuclear and Pressure Vessel Industries, 24-26 Sept. 1996 Conference Proceedings page 541/546
  2. H. Heckhäuser, K.-H. Gischler, Das Zipscan -System bei der Ultraschallprüfung an plattierten Bauteilen und Rohrleitungen, Tagungsband der DGZfP "Automatisierung in der Ultraschallprüfung , Stand der Technik, Entwicklungstendenzen bei mobilen Prüfanlagen" (1989) Seite 122/132
  3. B. Böttcher, E. Schulz, H. Wüstenberg, A new method of crack determination in ultrasonic materials testing Proc. 7th Int. Conf. on NDT, Warschau 1973, Reprint No.130
  4. M.G. Silk, B.H. Lidington, Defect Sizing using an Ultrasonic Time Delay Approach, British Journal of NDT, March 1975, page 33/36
  5. M.G. Silk, The rapid analysis of TOFD data incorporating the provisions of standards, Proc. 6th European Conf. on NDT, 24.-28. Oct. 1994, Nice France, Vol. 1 page 25/29
  6. T. Just, G. Csapo, Ultrasonic crack depth measurement of surface breaking cracks in piping, UTonline Journal www.ultrasonic.de (also presented at the DGZfP workshop 1994)
  7. Final Draft prENV 583-6, Nondestructive Testing -Ultrasonic Examination- Part 6: Time of flight diffraction, technique as a method for defect detection and sizing
  8. J. Verkooijen, TOFD used to replace radiography, INSIGHT Vol. 37 No 6 June 1995 page 433-435
  9. M.G.Silk, Estimates of the probability of detection of flaws in TOFD data with varying levels of noise, INSIGHT Vol. 38 No 1 January 1996 page 31-36
  10. DIN 54125 Manuelle Prüfung von Schweißverbindungen mit Ultraschall
  11. DIN EN 1714 Ultrasonic weld inspection
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