Dynamic property determination of magnetostrictive iron-gallium alloys

Luke M. Twarek; Alison B. Flatau

doi:10.1117/12.600186

16 May 2005 Dynamic property determination of magnetostrictive iron-gallium alloys

Luke M. Twarek, Alison B. Flatau

Proceedings Volume 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics; (2005) https://doi.org/10.1117/12.600186
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

Alloys of iron and non-magnetic gallium (of the form Fe_1-xGa_x), collectively referred to as Galfenol, have been shown to exhibit magnetostrictions in excess of 300 ppm under quasi-static magnetic fields [1]. However, to harness the full potential of this material as an actuator, characterization of Galfenol's magneto-mechanical properties under dynamic operating conditions is required. Broadband frequency domain results include strain per applied magnetic field transfer functions and complex electrical impedance functions. The properties investigated were linear mechanical rod stiffness, magneto-mechanical coupling coefficient, modulus of elasticity, and system structural damping. The samples tested were single-crystal cylindrical Galfenol rods with an atomic percentage of Gallium varying from 18 to 22.5. Some rods were composed of laminated strips of Galfenol to reduce eddy current effects and increase the efficiency of transduction. It was found that lamination did not significantly degrade the stiffness nor increase the structural damping, but did increase the magneto-mechanical coupling coefficient by ~50% over the solid rod for the conditions studied.

Citation Download Citation

Luke M. Twarek and Alison B. Flatau "Dynamic property determination of magnetostrictive iron-gallium alloys", Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); https://doi.org/10.1117/12.600186

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available