摘要:
The invention relates to a method and a device for detecting near-surface defects (152) in a sample (150) made at least partially of ferromagnetic material, wherein a test volume of the sample is magnetized and scanned for magnetic flux leakages (155) caused by defects. The test volume is magnetized by means of a constant magnetic field (135), and simultaneously by means of an alternating magnetic field (145) superposed on the constant field.