Phase Coherence vs TFM on LOF and Porosity

In this installment, Shane Walton with University of Ultrasonics compares TFM and Phase Coherence Imaging results on everyday weld flaws- lack of sidewall fusion and porosity. The component under examination is carbon steel material, half- inch thick, single V weld geometry with a 37.5 degree bevel. Typical API- type weld sample.