Phase-selective Ultrasonic Testing
Phase-selective ultrasonic testing uses high-frequency sound waves to detect internal inhomogeneities and microstructural differences in metals. Evaluation is done by the time-of-flight and amplitude of reflected signals.
How It Works: Physical-Chemical
High-frequency ultrasound waves are sent into the material and bounce off inhomogeneities or material changes. Phase selection lets you pick up specific microstructures or structures.
Why It Matters in Welding & Risks
This test is key for checking weld quality and integrity. Missing or overly strong reflections can point to material defects that might cause cracks or stress concentrations.
Shop Practice & What to Do
Use high-frequency ultrasonic equipment with phase selection capability. Make sure the sound wave pulse reflects clearly and precisely. Analyze the travel time and amplitude of the signals carefully to see if there are inhomogeneities or microstructural differences.