We present a new approach to microstructural magnetic nondestructive evalua
tion (NDE) based on multiparameter measurements of magnetomechanical proper
ties, A steel specimen was magnetized with a C-core using a triangular wave
form of order I Hz in frequency. Hysteresis loops were obtained for five qu
antities: magnetoacoustic emission (MAE) and Barkhausen effect (BE) intensi
ties, magnetic flux derivative, external magnetic field strength, and magne
tostriction. The ability to extract the magnetic flux second derivative and
the derivative of the magnetostriction permitted the investigation of seve
ral new interrelationships between MAE and other magnetic properties. Appro
ximate coincidences were observed between MAE peak field position and peaks
in magnetic flux second derivative and derivative of the magnetostriction.
These effects are discussed and reproduced using existing magnetic modelin
g of MAE and corresponding modeling of flux density and magnetostriction.