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Shear Wave Weld Inspection

PAUT-aligned defect geometry, selectable A-scan rectification, and live probe raster inspection.

Prep Rectification

Defect

Instrument settings Velocity · range · beam spread

Material Velocity m/s Display range Beam spread

Velocity changes time-of-flight conversion, not the selected refracted angle. Beam spread is a synthetic training approximation.

Plate view width 440 mm

Live A-scanLeg 1 / Leg 2

Angle Probe

Gain +20 dB

Gate A start 0.0 mmGate length 35.0 mm

Gate A: 0.0–35.0 mm

%AMP

—%

S-PATH—mm

SURFACE—mm

DEPTH—mm

INDEX—mm

SCAN DISTANCE—mm

AXIAL—mm

Side view • first, second and third leg

Green: first leg · amber: second leg · violet: third leg. Defects are drawn on the actual Single-V or Double-V fusion geometry, not as generic circles.

Examination report • three indications

−6 dB sizing • measurement reference

Distance from datum	Top edge of plate (Y = 0) → first / leading −6 dB end as you scan down the weld (smaller Y). Not the centre.
Length	First −6 dB end → last −6 dB end along the weld (Y); subtract the two Y positions.
Height	Upper (OD-side) −6 dB extent → lower (ID-side) −6 dB extent, vertically through the wall (Z). Not the sound path or distance along a bevel.
Depth from OD	OD surface (Z = 0) → lower / deepest −6 dB extent of the flaw. Report its bottom, not its top or centre.
Axial position	Weld centreline (X = 0) → midpoint between the transverse −6 dB limits (flaw centre across the weld). − left, + right.
Classification	Identify the defect type and correct side/bevel where applicable.

−6 dB = 50% of the peak amplitude. Hold the same echo in Gate A, find the strongest response, then work outward to the half-amplitude limits; lower gain if the display clips at 100% FSH. Live Distance from datum is the probe Y, not automatically the first defect end. Live A-scan Depth is the gated echo position, not automatically the lower −6 dB extent.

Scoring: distance from datum 20%, length 15%, height 15%, depth from OD 15%, axial location 15%, classification 20%. Submit and grade each defect separately. The overall score appears after all three submissions.

Synthetic training responses only. The plotted defects use physical weld coordinates, but waveforms are not calibrated inspection data or code acceptance criteria.

Straight beam corrosion / lamination Defect Hider • Challenge Codes →Advanced UT • PAUT / TFM →