As one of key techniques for guided waves NDT based on magnetostrictive effect, the transducer is a “bridge” which plays an important role in practical inspection. In the experiments, we find that the guided wave echo-signals detected in pipes are affected by the position of the magnetostrictive transducer. First, guided waves’ generation mechanism and its propagating characteristics in pipes a...

Smart actuators, such as shape memory alloy (SMA) and magnetostrictive actuators, exhibit saturation nonlinearity and hysteresis that may be symmetric or asymmetric. The Prandtl–Ishlinskii model employing classical play operators has been used to describe the hysteresis properties of smart actuators that are symmetric in nature. In this study, the application of a generalized play operator capa...

Preisach modeling, long known in the area of magnetics, has introduced mathematical abstraction to the modeling of the highly nonlinear and complex phenomenon of hysteresis. The 2D Preisach-type models presented here, departing slightly from the classical formulation, waive some of its limitations while maintaining the major advantages of simplicity and speed in calculations. Results on differe...

The possible existence of self-organized criticality in Barkhausen noise is investigated theoretically through a single interface model, and experimentally from measurements in amorphous magnetostrictive ribbon Metglas 2605TCA under stress. Contrary to previous interpretations in the literature, both simulation and experiment indicate that the presence of a cutoff in the avalanche size distribu...

The magnetostrictive atomic strain in a pure Fe single crystal was measured by differential x-ray absorption spectroscopy. The obtained tetragonal magnetostriction constant, (3/2)λ100, was determined to be 45 ppm, consistent with the previously reported theoretical value calculated from a spin-orbit coupling theory. These results provide a foundation for understanding the origin of magnetostric...

Magnetostrictive transducers are commonly used as actuators and sonar transducers, in remote non-destructive evaluation. Their use wireless thermometry is relatively unexplored. Since magnetostriction-based sensors passive, they could potentially enable long-term near-field thermometry. While the temperature sensitivity of resonance frequency magnetostrictive has been reported previous studies,...