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Magnetomechanical damping in giant magnetostriction alloys

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Abstract

Magnetomechanical damping in the giant magnetostriction material Terfenol-D has been investigated by quasi-static stress-strain measurements and modeled theoretically. The damping capacity is a strong function of applied stress amplitude, increasing to a maximum at some finite stress and then decreasing slowly at still larger applied stresses. Maximum damping capacities greater than 1.0 were observed for the lowest magnetic bias fields and prestresses at applied stress amplitudes of 4 MPa. Both the qualitative behavior of the damping and its magnitude are successfully described by a model of abrupt magnetization jumps within individual domains driven by the applied stress.

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Authors and Affiliations

  1. Naval Surface Warfare Center, 20903, Silver Spring, MD

    K. B. Hathaway (research physicists), A. E. Clark (research physicists) & J. P. Teter (research physicists)

Authors
  1. K. B. Hathaway
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  2. A. E. Clark
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  3. J. P. Teter
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Additional information

This article is based on a presentation given in the Mechanics and Mechanisms of Material Damping Symposium, October 1993, in Pittsburgh, Pennsylvania, under the auspices of the SMD Physical Metallurgy Committee.

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Hathaway, K.B., Clark, A.E. & Teter, J.P. Magnetomechanical damping in giant magnetostriction alloys. Metall Mater Trans A 26, 2797–2801 (1995). https://doi.org/10.1007/BF02669638

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