Improving the Inspectability of Stainless Steel and Dissimilar Metal Welded Joints Using Inverse Phase-Matching of Phased Array Time-Domain Signals

The ability to perform nondestructive testing of stainless steel piping and dissimilar metal joints in excess of 10.0mm (.4') wall thickness is very limited. In particular the use of ultrasound to detect closed (tight) cracking, which is not detected by X-ray techniques, is very difficult due t...

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Bibliographic Details
Published in:E-journal of Nondestructive Testing 2007-03, Vol.12 (3)
Main Authors: Kroning, M, Bulavinov, A, Reddy, Km, Waite, F, Dalichow, M
Format: Article
Language:English
Online Access:Get full text
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Summary:The ability to perform nondestructive testing of stainless steel piping and dissimilar metal joints in excess of 10.0mm (.4') wall thickness is very limited. In particular the use of ultrasound to detect closed (tight) cracking, which is not detected by X-ray techniques, is very difficult due to the acoustic anisotropic structure of the welded seam. Several Reactor Safety Program projects have presented extensive knowledge and better understanding of how to enhance the test procedures for this type of welded joint. Resulting standards and regulations for the qualification of applicable techniques and procedures provide evidence of the limitations of conventional X-ray and ultrasonic methods.
ISSN:1435-4934
1435-4934