Wave modes: Shear Horizontal and Longitudinal waves in frequencies ranging from 500KHz to 10MHz. Whereas EMAT can generate both Shear and Longitudinal waves at 0 degrees, Shear (Horizontal) waves are easier to generate.
Materials Inspected: Ferromagnetic and non-ferromagnetic metals.
Corrosion and erosion measurement.
Flaw detection, such as, inclusions, de-laminations and disbond.
Acoustic velocity measurement.
Rolling direction recognition.
Anisotropy and stress measurement.
Dry and non-contact. Practical working distance from the coil to the part (lift-off) is usually between 0-3mm. Greater lift-off can be achieved (up to 10mm in laboratory settings), depending on material, equipment and type of inspection. Ideal for automated and hot environments.
Not affected by surface conditions (coatings, oil, oxide).