Structural and Magnetic Characterization of Fe-Mn-Al-Ni Pseudo-Heusler Alloy

In this paper, the production and structural, superelastic, thermoelastic, and magnetic properties of melt-spun Fe 43.5 Mn 34 Al 15 Ni 7.5 alloy have been investigated with the aim to employ it for contactless strain measurements. Structural properties were observed by scanning electron microscope and X-ray diffraction, which shows the existence of two phases (fcc and bcc). Magnetic properties were studied by vibrating sample magnetometer and LCR-Bridge. Superelasticity was investigated by straining a ribbon. Measured superelastic strain at room temperature was ~0.5%. Within that range we achieved 12% change of permeability that arises from the structural transition between two recognized phases. It proves that Fe 43.5 Mn 34 Al 15 Ni 7.5 superelastic alloy is a promising potential contactless sensor of strain.