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NDT.net Issue - 2017-12 - Articles
NDT.net Issue: 2017-12
Publication: NDT in Canada 2017, June 6-8, Quebec (NDT Canada 2017)
Session: Phased Array UT (PAUT) Development
ARTICLE

Weld Penetration Monitoring using semi automated PAUT

Daly Souissi
Nucleom inc.7, Québec, Canada

Abstract: For partial penetration (PP) joints, several methods have been developed to estimate the depth of weld penetration as accurately as possible. Since it is not directly visible, most of methods were based on indirect measurements using the geometrical parameters of the weld pool, temperature field, oscillation frequency etc. Various techniques were used such as vision, conventional ultrasonic testing (CUT), acoustic emission, thermal examination and macroscopic examination. The macro etch testing is the most accurate method to check the weld penetration however it is a destructive method that involves cutting a sample from the welded joint therefore could not be an alternative for postproduction inspection. This paper presents the advanced solution Nucleom has developed to determine PP joints penetration, which consists in a semi automated Phased Array UT (PAUT) technique that was performed on orthotropic decks and structural boxes welding.


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