Crack Testing on Ferromagnetic Components

Inspecting the surface for cracks is imperative, especially in the case of safety-relevant components. Normally, flux leakage tests are carried out for this purpose. Our magneto-optical systems now make it possible to evaluate the scatter fields digitally and in high resolution.

Depending on their geometry, cracks in ferromagnetic materials produce a change in the flux leakage on the component surface when a supporting magnetic field is applied. These characteristic changes allow us to detect cracks as small as 0.1 mm in width with magneto-optical systems such as our cmos-magview.

A magneto-optical crack test can also be carried out on permanent magnetic materials. The high resolution and rapid, extensive visualization of the scatter field render our systems very well suited for this task.