Ultrasonic test is a detection method that uses physical properties such as propagation, reflection, and attenuation of ultrasonic waves in objects to discover defects. It belongs to a type of non-destructive testing (NDT) that can inspect the surface and internal quality of products without damaging them.
The principle of Ultrasonic test
The principle of ultrasonic test is to utilize the propagation characteristics of ultrasonic waves in the material being tested. When ultrasonic waves encounter defects in materials, reflection occurs. If the size of the defect is greater than or equal to the wavelength of the ultrasonic wave, the reflected wave will be detected and displayed by the flaw detector; If the defect size is smaller than the wavelength, ultrasonic waves will bypass the defect and continue to propagate.
The application of Ultrasonic test
Ultrasonic test is widely used for the detection of metal and non-metal materials, especially for inspecting defects such as cracks, incomplete fusion, incomplete penetration, slag inclusion, and porosity in welds.
