Comparison of transduction behavior of polycrystalline gallium-iron alloys and Terfenol-D

Julie C. Slaughter; Eric M. Summers; Jonathan D. Snodgrass

doi:10.1117/12.539773

21 July 2004 Comparison of transduction behavior of polycrystalline gallium-iron alloys and Terfenol-D

Julie C. Slaughter, Eric M. Summers, Jonathan D. Snodgrass

Proceedings Volume 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics; (2004) https://doi.org/10.1117/12.539773
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

This investigation focused on dynamic characterization of a laminated polycrystalline sample of Fe_81.6Ga_18.4 alloy grown by the FSZM process. Previous studies using static characterization methods have shown unique properties of the alloy for use in transducers and active structures. Static characterization values were verified and material properties were contrasted with the "giant" magnetostrictive material Terfenol-D. Common test methods were used for dynamic characterization to calculate Young's modulus, coupling coefficient, magnetostrictive coefficient, and permeability. In addition, mechanical Q and potential efficiency were calculated. Comparison with static testing of single crystal samples showed that modulus, permeability, and magnetostrictive coefficient were very close to static values, with any differences being attributed to test fixture effects and material differences. Coupling coefficient appeared to be quite low, but no correction was applied for the test fixture losses and magnetic circuit effects. Comparisons with Terfenol-D show that with significantly less magnetic field, iron-gallium alloys can be used in high Q systems to achieve large acceleration and force output. The unique structural and magnetic properties of gallium-iron alloys enable applications that would be difficult or impossible with Terfenol-D.

Citation Download Citation

Julie C. Slaughter, Eric M. Summers, and Jonathan D. Snodgrass "Comparison of transduction behavior of polycrystalline gallium-iron alloys and Terfenol-D", Proc. SPIE 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics, (21 July 2004); https://doi.org/10.1117/12.539773

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