MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Detection of Fatigue Cracks at Weld Toes by Crack Detection Paint and Surface SH Wave
Ichihiko TakahashiMichio Ushijima
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2007 Volume 48 Issue 6 Pages 1190-1195

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Abstract

A crack detection (CD) paint was applied to weld lines of a transverse rib welded joint specimen of a rolled steel for welded structures, and the effects of the paint on visual detection of fatigue cracks were evaluated by performing a fatigue test. Remarkable color development was observed in the CD paint when fatigue cracks propagated along the weld toe lines. At intervals in the fatigue test, surface SH (Secondary Horizontal) wave tests were also carried out in order to confirm the existence of fatigue cracks, and the test results were compared with the color development in the CD paint.

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© 2007 The Japanese Society for Non-Destructive Inspection
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