Measured iron-gallium alloy tensile properties under magnetic fields

Jin-Hyeong Yoo; Alison B. Flatau

doi:10.1117/12.547548

21 July 2004 Measured iron-gallium alloy tensile properties under magnetic fields

Jin-Hyeong Yoo, Alison B. Flatau

Proceedings Volume 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics; (2004) https://doi.org/10.1117/12.547548
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

Tension testing is used to identify Galfenol material properties under low level DC magnetic bias fields. Dog bone shaped specimens of single crystal Fe_100-xGa_x, where 17≤x≤33, underwent tensile testing along two crystalographic axis orientations, [110] and [100]. The material properties being investigated and calculated from measured quantities are: Young's modulus and Poisson's ratio. Data are presented that demonstrate the dependence of these material properties on applied magnetic field levels and provide a preliminary assessment of the trends in material properties for performance under varied operating conditions. The elastic properties of Fe-Ga alloys were observed to be increasingly anisotropic with rising Ga content for the stoichiometries examined. The largest elastic anisotropies were manifested in [110] Poisson's ratios of as low as -0.63 in one specimen. This negative Poisson's ratio creates a significant in-plane auxetic behavior that could be exploited in applications that capitalize on unique area effects produced under uniaxial loading.

Citation Download Citation

Jin-Hyeong Yoo and Alison B. Flatau "Measured iron-gallium alloy tensile properties under magnetic fields", Proc. SPIE 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics, (21 July 2004); https://doi.org/10.1117/12.547548

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