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Ultrasonic characterisation of dissimilar welds for the nuclear industry

Ultrasonic characterisation of dissimilar welds for the nuclear industry

Assuring the quality and correctness of welds is of great importance to nuclear industry. Strict safety requirements are leading to increased demands for the inspection and maintenance of such components.

This study analyses ultrasonic beams behaviour depending on the grain orientation of the weld. The grain orientation has been defined using different mathematical models (Lanrenberg, Schmitz, Ogilvy).

Based on the mathematical models, beams generated by conventional and phased-array transducers (linear and matrix) have been analysed. CIVA software, a specific ultrasonic tool, has been used for that purpose, and the results obtained have been validated in the laboratory using simulated transducers.

The results determine Ogilvy as the best grain orientation approximation.

MAGAZINE/CONFERENCE:

13th National Conference on NDT, Sevilla (Spain)

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