Non-contact crack detection
on metal parts

Crack detection systems

Induction thermography is a non-contact method that can detect cracks in a matter of seconds. Typical applications are forged components, hardened parts, gears and bars. The inspection is usually integrated into the process and runs fully automatically. The high inspection speed allows integration within the production cycle time. We develop the right crack detection equipment and automated crack detection systems for this.

Crack detection in a nutshell

Our automated testing equipment and testing systems with induction thermography are used when a non-contact measuring technique with short measuring times is required, e.g. for crack testing. Induction thermography is very robust and works even under difficult environmental conditions. In contrast to dye penetrant testing or magnetic particle testing, the test specimens are tested completely without contact and without the use of chemical additives.

How crack detection works

The surface of the test specimen or test object is heated by means of induction. The resulting current density distribution in the material is spoiled by cracks or other irregularities, such as overrolling. Hot spots” form on the surface due to heat build-up, which are detected with an infrared camera.