For example, the eddy current testing method finds applicationwhile testing the thickness of conductive materials, such as metals. Thistesting method works only on conductive materials because magnetism plays acrucial role in its operation!
This testing method isquite effective at detecting cracks, hardness, and thickness. Here is how theeddy current testing method works:
1. This test method uses thephenomenon of electromagnetic induction. It detects changes in magnetic fieldsto determine the attributes for which the test takes place.
2. The device comes with awire coil, through which an alternating current flows. This results in thecreation of an oscillating magnetic field.
3. When the probe, along withits magnetic field, comes near the test material, it results in an eddycurrent. Electrons in the material start flowing in a circular motion.
4. The eddy current generatesa magnetic field of its own, which starts interacting with the probe's magneticfield.
5. If there are any changesin the thickness or any cracks near the material's surface, they will alter themagnetic field.
An eddy current testing device can accuratelydetect the changes in the magnetic field, and a professional can derive thenecessary information from it. The non-destructive, quick, and precise natureof the test method makes it a popular option!