Cswip 3.1 Technology Questions And Answers »

In UT (ultrasonic testing), what is the difference between a compression wave (L-wave) and a shear wave ? A: | Feature | Compression wave | Shear wave | |---------|----------------|------------| | Particle motion | Parallel to propagation | Perpendicular to propagation | | Velocity | Faster (~5900 m/s in steel) | Slower (~3230 m/s in steel) | | Used for | Thickness gauging, flaw detection in coarse grain | Weld inspection (angle probes) |