Magnetic, Magnetoelastic and Corrosion Resistant Properties of (Fe–Ni)-Based Metallic Glasses for Structural Health Monitoring Applications

We have performed a study of the magnetic, magnetoelastic, and corrosion resistance properties of seven different composition magnetoelastic-resonant platforms. For some applications, such as structural health monitoring, these materials must have not only good magnetomechanical properties, but also a high corrosion resistance. In the fabricated metallic glasses of composition [Formula: see text] , the Fe/Ni ratio was varied (Fe + Ni = 73% at.) thus changing the magnetic and magnetoelastic properties. A small amount of chromium [Formula: see text] was added in order to achieve the desired good corrosion resistance. As expected, all the studied properties change with the composition of the samples. Alloys containing a higher amount of [Formula: see text] than [Formula: see text] do not show magnetic behavior at room temperature, while iron-rich alloys have demonstrated not only good magnetic properties, but also good magnetoelastic ones, with magnetoelastic coupling coefficient as high as [Formula: see text] for [Formula: see text] in the [Formula: see text] (the sample containing only [Formula: see text] but not [Formula: see text]). Concerning corrosion resistance, we have found a continuous degradation of these properties as the [Formula: see text] content increases in the composition. Thus, the corrosion potential decreases monotonously from 46.74 mV for the [Formula: see text] , composition [Formula: see text] to −239.47 mV for the [Formula: see text] , composition [Formula: see text].