Surface analysis by nondestructive testing techniques

Nondestructive testing (NDT) goes beyond the determination of geometrical, physical, and chemical as well as technological parameters. In addition to this, measuring results are compared with predetermined values so that quality features can be tested. Specific NDT-methods suitable for surface analysis like eddy current testing, Barkhausen noise measurements, ultrasonics, and atomic force microscopy are discussed. Furthermore, the contrast mechanisms, the resolution and their application in NDT are presented.