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Proceedings Paper

Measurement of magnetic field dependent Young’s modulus of iron-gallium alloy in flexural mode
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Paper Abstract

Iron-Gallium alloys have demonstrated high compressive stress sensitivity (~ 30 T/GPa) along with considerable tensile strength (~ 515 MPa) and Young's modulus (~ 65 GPa) thus making them attractive materials for magnetostrictive sensors. In this work, four-point bending test was performed on single crystal Fe84Ga16 (Galfenol) under magnetic field to characterize its magneto-mechanical response in bending mode. The longitudinal and transverse strains (ε[100] and ε[010]) obtained under different mechanical loads (P) and DC magnetic bias fields (H) were used to estimate material properties like average Young's modulus (E[100]) and Poisson's ratio (ν[010]). The stress-dependent change in magnetic induction (B) at constant bias fields was obtained for different bending loads. The results of this study helps in understanding the behavior of and challenges related to Galfenol based magnetostrictive sensors which work in bending (flexural) mode.

Paper Details

Date Published: 6 April 2006
PDF: 8 pages
Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 61700N (6 April 2006); doi: 10.1117/12.658754
Show Author Affiliations
Supratik Datta, Univ. of Maryland, College Park (United States)
Alison B. Flatau, Univ. of Maryland, College Park (United States)


Published in SPIE Proceedings Vol. 6170:
Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics
William D. Armstrong, Editor(s)

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