Hybrid methods for materials characterization
A nondestructive hybrid method combines two or more testing methods. Hybrid methods acquire several measuring quantities with different physical information content of the tested materials and different sensitivities against disturbing influences. After calibration procedures this allows a quantitative determination of material properties like residual stresses, hardness, hardening depth, yield strength, etc. This section will give an insight into combinations of micromagnetic, eddy current and ultrasonic methods, and it presents examples of applying such nondestructive hybrid methods.