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Bending of Iron-Gallium (Galfenol) Alloys for Sensor Applications

Published online by Cambridge University Press:  01 February 2011

Patrick R. Downey  and
Alison B. Flatau
Patrick R. Downey
Affiliation:
[email protected], University of Maryland, 3181 Martin Hall, College Park, Maryland, 20742, United States
Alison B. Flatau
Affiliation:
[email protected], University of Maryland, Aerospace Engineering, United States
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Abstract

This project investigates the magnetomechanical sensing behavior of iron-gallium alloys in response to applied bending loads to identify the relevant design criteria for novel magnetostrictive sensor applications. A series of experiments are conducted on the magnetic induction response of cantilevered beams to dynamic bending loads. Analytic models of the system are formulated from both the constitutive magnetostriction equations and a free energy derivation. Both the experimental and analytical results show a change of as much as 0.3 T of induction can be measured in the samples in response to relatively small applied forces, with the output magnetic signal appearing at twice the frequency of beam vibration.

Keywords

sensorferromagneticelastic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 888: Symposium V – Materials and Devices for Smart Systems II , 2005 , 0888-V06-11
Copyright
Copyright © Materials Research Society 2006

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References

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