Producing and quantifying induced uniaxial anisotropy in stress annealed polycrystalline Galfenol

Jessica Boer; James B. Restorff; Eric Summers

doi:10.1117/12.715135

20 April 2007 Producing and quantifying induced uniaxial anisotropy in stress annealed polycrystalline Galfenol

Jessica Boer, James B. Restorff, Eric Summers

Proceedings Volume 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007; 65262I (2007) https://doi.org/10.1117/12.715135
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

A process for inducing uniaxial anisotropy in 18.4 at% Galfenol has been developed, applied, and proven to be reliable. The stress annealing procedure that produces the most consistent results and induces the highest uniaxial anisotropy in FSZM Galfenol (6.35 mm &nullset;) is one modified from previous works by the Magnetic Materials Group at Naval Surface and Warfare Center (NSWC) - Carderock. Further modification in which applied stress is lowered and temperature is raised has proven most successful for stress annealing Bridgman Galfenol (20.83 mm &nullset;) and, in addition, has produced an increase in saturation magnetostriction. Model calculations show predicted tensile operation ranges, on average, of 69 MPa for research grade and 40 MPa for production grade FSZM 18.4 at% Galfenol in which full magnetostriction can be utilized.

Citation Download Citation

Jessica Boer, James B. Restorff, and Eric Summers "Producing and quantifying induced uniaxial anisotropy in stress annealed polycrystalline Galfenol", Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65262I (20 April 2007); https://doi.org/10.1117/12.715135

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