Grain size effects on magnetomechanical damping properties of ferromagnetic Fe–5 wt.% Al alloy

To clarify the effects of grain size on the damping capacity of a ferromagnetic Fe–5 wt.% Al alloy with an average grain size of 130–845 μm, the magnetomechanical properties and microstructures were studied. The results showed a maximum damping capacity at a certain average grain size. Thus, it was...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2006-09, Vol.431 (1), p.80-85
Hauptverfasser: Seo, Young Ik, Lee, Baek-Hee, Kim, Young Do, Lee, Kyu Hwan
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description To clarify the effects of grain size on the damping capacity of a ferromagnetic Fe–5 wt.% Al alloy with an average grain size of 130–845 μm, the magnetomechanical properties and microstructures were studied. The results showed a maximum damping capacity at a certain average grain size. Thus, it was proposed that the damping capacity is proportional to the total area of the 90° domain walls represented by the mean 90° domain width and the saturation magnetostriction. It can be reasonably explained that with grain growth, the saturation magnetostriction increases and the total area decreases. Leading to the result of a maximum damping capacity at a certain average grain size where the best combination of the two factors was found.
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Fe and its alloys
Ferromagnetic
Grain size effect
Magnetic properties and materials
Magnetomechanical damping
Physics
Piezoelectricity and electromechanical effects
Studies of specific magnetic materials
title Grain size effects on magnetomechanical damping properties of ferromagnetic Fe–5 wt.% Al alloy
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