Angle Beams II

Angle Beam Transducers and wedges are typically used to introduce a refracted shear wave into the test material. The geometry of the sample below allows the sound beam to be reflected from the back wall to improve detectability of flaws in and around welded areas.

The distance between where the ultrasonic pulse enters the material and exits on the same surface is the skip distance. The skip distance is twice the material thickness times the tangent of the refraction angle.