What type of data is generated from an eddy current test?

Eddy current testing primarily generates data related to the amplitude and phase angle of the induced eddy currents. This method works on the principle of electromagnetic induction, where an alternating current is passed through a coil to induce eddy currents in the conductive material being tested. The characteristics of these eddy currents provide valuable information about the material's properties.

The amplitude of the eddy current can indicate flaws, changes in material thickness, or variations in conductivity. In contrast, the phase angle shift can provide insights into material type, heat treatment conditions, and even the presence of surface or subsurface defects. Both amplitude and phase measurements are crucial for diagnosing material conditions and identifying any defects or irregularities effectively, making this data essential in the evaluation of materials.

Other options like type of material, visual inspection, and thermal conductivity measurements do not directly pertain to the specific measurements and data that eddy current testing provides. Instead, they may be relevant in different contexts of material testing or analysis.