Overview of magnetostrictive materials and their use in devices  (Conference Presentation)

Alison B. Flatau

doi:10.1117/12.2518375

29 March 2019 Overview of magnetostrictive materials and their use in devices (Conference Presentation)

Alison B. Flatau

Author Affiliations +

Proceedings Volume 10968, Behavior and Mechanics of Multifunctional Materials XIII; 109680U (2019) https://doi.org/10.1117/12.2518375
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

bstract Novel sensors and energy harvesting transducers take advantage of the significantly expanded design space made possible by recent advances in structural magnetostrictive alloys. These alloys can be machined and welded, have high fracture toughness, and can actuate, sense, and carry load while subjected to tension, compression, and bending. The talk includes an introduction to magnetostrictive materials and transduction, and a discussion on the use of low-cost rolling and annealing methods in lieu of more costly crystal growth methods for making bulk iron-gallium (Galfenol) and iron-aluminum (Alfenol) alloys. The process of using magnetostrictive materials to convert mechanical energy into magnetic energy and then into electrical energy is explained and demonstrated using sensors and energy harvesting devices as examples. Examples of magnetostrictive devices include prototypes ranging in size from nanowire-based pressure sensors to huge structures floating in the ocean that convert wave energy into electrical power for “community-scale” energy needs. The recent discovery of a particularly unique attribute of these alloys, their auxetic behavior, will also be discussed. In both Galfenol and Alfenol, both strain and magnetic fields can produce simultaneous increases in lateral and longitudinal dimensions, with measured values of the resulting Poisson ratio being not only negative, but as low as -2.0 in some cases. Mechanical, aerospace and civil engineers should find the discussion on the use of magnetic fields to control auxetic behavior quite interesting.

Conference Presentation

Citation Download Citation

Alison B. Flatau "Overview of magnetostrictive materials and their use in devices (Conference Presentation)", Proc. SPIE 10968, Behavior and Mechanics of Multifunctional Materials XIII, 109680U (29 March 2019); https://doi.org/10.1117/12.2518375

Access the abstract

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

CITATIONS

Cited by 1 scholarly publication.

Explore citations on Lens.org

KEYWORDS

Magnetostrictive materials

Magnetic sensors

Magnetism

Sensors

Aerospace engineering

Energy harvesting

Annealing

Show All Keywords

RELATED CONTENT

Design and testing of a dynamically tuned magnetostrictive spring with...
Proceedings of SPIE (April 01 2015)

FEM implementation of a magnetostrictive transducer
Proceedings of SPIE (May 17 2005)

Magnetomechanical coupling factor and energy density of single crystal iron...
Proceedings of SPIE (April 02 2008)

Measurement of magnetic field dependent Young’s modulus of iron gallium...
Proceedings of SPIE (April 06 2006)

Deformation behavior of polycrystalline Galfenol at elevated temperatures
Proceedings of SPIE (April 20 2007)

Modeling techniques for magnetostrictive actuators
Proceedings of SPIE (June 06 1997)

Preliminary model of a 3D dynamically loaded galfenol based stress...
Proceedings of SPIE (April 28 2011)

Subscribe to Digital Library

Receive Erratum Email Alert

Show All Keywords

Keywords/Phrases

Search In:

Publication Years