ADVANCED FLAW SIZING IN PRACTICE

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Authors
  1. Sevenhoven, C.V.
  2. van Leeuwen, W.H.
Corporate Authors
Royal Netherlands Navy, Amsterdam (Netherlands);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
One of the activities of the Dutch Welding Institute (NIL) is to initiate and coordinate research projects, among which projects in the field of non-destructive testing (NDT). The most recent of these was the project "Advanced Flaw Sizing under Practical Conditions", which will be reported. The aim of this project was to evaluate the practical applicability of various non-destructive flaw sizing techniques on a series of weld samples with many different geometries, wall thicknesses and defect types. Apart from the accuracy of the sizing results, attention was paid to the ease and level of confidence of the signal interpretation, the necessity to use advanced systems under various conditions and the requirements with respect to the inspection personnel. An additional point of interest was to assess in which cases the TOFD (time-of-flight diffraction) technique would be useful for flaw detection as well as for sizing. The flaw sizing techniques considered in this project were: - the ultrasonic flaw tip reflection (FTR) technique, - the ultrasonic time-of-flight diffraction (TOFD) technique, - supersaft, which is an ultrasonic focused imaging technique, - the alternating current potential drop (ACPD) technique, and - the direct current potential drop (DCPD) technique. The results and conclusions will be summarized.
Report Number
DREA-NAMT-93-5-PAP-21 — CONTAINED IN 99-00578
Date of publication
30 Apr 1993
Number of Pages
11
DSTKIM No
99-00600
CANDIS No
510326
Format(s):
Hardcopy;Document Image stored on Optical Disk

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