Characterization and energy-based model of the magnetomechanical behavior of polycrystalline iron–gallium alloys

The actuation and sensing behavior of a typical polycrystalline Fe81.6Ga18.4 alloy sample grown using free stand zone melt (FSZM) manufacturing processes was characterized and its cross-section texture was determined at three transverse stations using electron back-scattering diffraction (EBSD). An attempt was made to model the actuation and sensing behavior of the polycrystalline magnetostrictive sample from its cross-section texture by treating the polycrystal as composed of multiple grains of single crystals, each with a different orientation to the loading axis. The polycrystalline magnetomechanical behavior was modeled as the sum of the volume fraction weighted single-crystal behavior along the [100], [110], [210], [310], [111], [211] and [311] directions, which are modeled using the energy-based approach discussed in Armstrong (1997 J. Appl. Phys. 81 2321) and Atulasimha (2006 PhD Thesis Aerospace Engineering, University of Maryland).

[1]  Alison B. Flatau,et al.  Quasi-static Transduction Characterization of Galfenol , 2005 .

[2]  William D. Armstrong,et al.  Magnetization and magnetostriction processes in Tb(0.27−0.30)Dy(0.73−0.70)Fe(1.9−2.0) , 1997 .

[3]  L. Kestens,et al.  Modelling the magnetostriction coefficient of polycrystalline ferromagnetic materials with a cubic structure by means of the finite element method , 2002 .

[4]  Eric Summers,et al.  Magnetic and mechanical properties of polycrystalline Galfenol , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[5]  Alison B. Flatau,et al.  Texture and grain morphology dependencies of saturation magnetostriction in rolled polycrystalline Fe83Ga17 , 2003 .

[6]  Alison B. Flatau,et al.  Energy-based model for the magnetostrictive behavior of polycrystalline iron-gallium alloys , 2006, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[7]  Marilyn Wun-Fogle,et al.  Magnetostrictive properties of body-centered cubic Fe-Ga and Fe-Ga-Al alloys , 2000 .

[8]  H. Callen,et al.  Magnetostriction of Polycrystalline Aggregates , 1965 .

[9]  Zin-Hyoung Lee,et al.  Modeling of magnetostriction in grain aligned terfenol-D and preferred orientation change of terfenol-D dendrites , 2002 .

[10]  Manfred Wuttig,et al.  Magnetic anisotropy of FeGa alloys , 2004 .

[11]  J. Atulasimha.  Characterization and Modeling of the Magnetomechanical Behavior of Iron-Gallium Alloys , 2006 .

[12]  R. Kellogg,et al.  Development and modeling of iron-gallium alloys , 2003 .