ASME 2003 International Mechanical Engineering Congress and Exposition
The objective of the work presented is characterization of the magnetoelastic transduction properties of single crystal and textured polycrystalline Fe-Ga alloys (Galfenol) under controlled mechanical, magnetic and thermal conditions. Polycrystalline samples of interest include a directionally solidified specimen, which possesses a favorable saturation magnetostriction output, and an extruded specimen, whose magnetostriction properties were significantly reduced by annealing. A brief discussion of the thermally controlled transducer used for the magnetic testing is presented first. Thereafter, the single crystal response to major-loop cyclic magnetic fields under different temperature and stress conditions, as well as its response to minor-loop cyclic magnetic fields and major-loop cyclic stress is examined. Next, the magnetic and magnetostrictive responses to major-loop cyclic magnetic field conditions are compared for the directionally solidified, extruded and single crystal specimens. The paper concludes with a magnetic characterization summary of the different Fe-Ga alloys examined.
American Society of Mechanical Engineers
Kellogg, Richard A.; Flatau, Alison B.; Clark, Arthur E.; Wun-Fogle, Marilyn; and Lograsso, Thomas A., "Quasi-Static Transduction Characterization of Galfenol" (2003). Ames Laboratory Conference Papers, Posters, and Presentations. 61.