Research on Fe(100-x)Gax Alloy Applied to Magnetostrictive Displacement Sensors
The saturation magnetostriction (λs) for Fe-Ni alloy can only reach 30ppm, leading the magnetostrictive displacement sensor based on the alloy not to be used in the large displacement measurement. Therefore, applying Fe(100-x)Gax alloy, of which maximum λs can reach 400 ppm to giant magnetostrictive displacement sensor is presented. The crystal magnetostrictive model is shown at first; and then the magnetostriction in  and  directions have the decided advantage over Fe-Ni alloy and Ni alloy is given; besides, the characteristics of high permeability, low coercivity and low hysteresis loss for Fe(100-x)Gax are shown; moreover, the signal of the magnetostrictive displacement sensors made from Fe(100-x)Gax is analyzed. Finally, it is proved that Fe(100-x)Gax (17≤x≤19) is practicable for extending measure range of MDS.
Chunliang Zhang and Paul P. Lin
X. Z. Zhou et al., "Research on Fe(100-x)Gax Alloy Applied to Magnetostrictive Displacement Sensors", Applied Mechanics and Materials, Vols. 226-228, pp. 2154-2159, 2012