Interface Reflectivity
Interfacial reflectivity is the proportion of reflected sound energy at material boundaries with different acoustic properties. It affects the quality of the sound image in ultrasonic testing.
Physical-Chemical Mechanism of Action
Interfacial reflectivity describes how much sound energy is reflected at the boundary between two materials. The greater the differences in acoustic properties (like density and elasticity) of the involved materials, the more energy is reflected.
Metallurgical Relevance & Risks in Welding
In the workshop, interfacial reflectivity affects the accuracy of ultrasonic testing. High reflectivities can lead to unclear or missing images, making it harder to detect defects. This can lead to safety risks as important flaw indications might be missed.
Workshop Practice & Action Instructions
To minimize interfacial reflectivity and get precise sound images:
• Use materials with similar acoustic properties at the weld boundaries.
• Ensure the surface of the workpieces to be inspected is clean and smooth.
• Calibrate the ultrasonic device regularly and check the sensitivity.