Flank Echo
Edge echo is an ultrasound signal reflected from steep edges such as cracks or geometric transitions. It helps measure the extent of defects.
Physical-Chemical Action Mechanism
Edge echo occurs when ultrasound waves are reflected at steep edges or cracks in a material. The wave energy is deflected and returned as an echo.
Metallurgical Relevance & Welding Risks
Edge echoes are important for weld quality inspection because they indicate cracks or irregularities in the material structure. A strong edge echo can indicate an overly hard weld or a hot crack, which can lead to fracture risks.
Workshop Practice & Instructions
To measure edge echoes, inspectors use high-resolution ultrasonic equipment. The wave gain should be set so that echoes from cracks are sharp and clear. A typical testing procedure involves setting a reference standard for edge height and comparing it with the actual echo from the weld.