Actuation with Terfenol-D

Author

Greenough, R.D. ; Schulze, M.P. ; Jenner, A.G.I. ; Wilkinson, A.J.

Author_Institution

Dept. of Appl. Phys., Hull Univ., UK

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5346

Lastpage

5348

Abstract

The magnetomechanical properties of Terfenol have been determined by two independent experimental techniques. Measurements on several samples of the same nominal compositions made by free-float zoning reveal variations in quality. With a novel technique for scanning along the length of a Terfenol rod, structural defects can be detected which may explain these variations. A difference between magnetostrictive surface and bulk strains has been observed, and the frequency response of the former is substantially different from theoretical predictions, casting doubt on techniques for the characterization of Terfenol which involve the use of dynamic (AC) fields to measure the magnetostrictive strain coefficient. A description of the control strategies used to implement the actuation of Terfenol-based transducers is given

Keywords

actuators; dysprosium alloys; iron alloys; magnetostriction; magnetostrictive devices; terbium alloys; transducers; Tb_xDy_1-xFe_1.95; Terfenol-D; Terfenol-based transducers; bulk strains; free-float zoning; frequency response; magnetomechanical properties; magnetostrictive strain coefficient; structural defects; surface strains; Actuators; Fluctuations; Magnetic field induced strain; Magnetic field measurement; Magnetic materials; Magnetic separation; Magnetostriction; Materials reliability; Permeability; Resonance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278834

Filename

278834