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Construction Weld Testing Procedures
Using Ultrasonic Phased Arrays
Figure 8-10
Figure 8 - S-scan data: (a) a midwall centerline notch for a 25.4 mm (1 in.) plate at 45 degrees; (b) a fusion line midwall discontinuity at 60 degrees in the near position for a 25.4 mm (1 in.) plate.
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Figure 9 - S-scans from a 25.4 mm (1 in.) plate with an artificial fusion line discontinuity approximately two thirds down towards the root: (a) near weld position (approximately 5 mm [0.2 in.] from the toe) - discontinuity is clearly visible; (b) approximately 15 mm (0.6 in.) from the toe (in between position) - discontinuity is clearly visible; (c) at the far position of approximately 25 mm (0.98 in.) - the discontinuity is disappearing; (d) just past the far position at approximately 30 mm (1.2 in.) - the discontinuity has disappeared.
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Figure 10 - Pulse/echo and time of flight diffraction scan of a plate with midwall discontinuities.
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