Influence of Al on the magnetostriction of Fe-Ga polycrystal alloys under compressive stress

Abstract

Fe₈₀Ga_20−xAl _x (x = 0, 6, 9, 14) ingots were prepared from high purity elements using a vacuum induction system. X-ray diffraction patterns show that the alloys are A2 disordered structures. The influence of the partial substitution of Ga in Fe-Ga alloys with Al on their magnetostrictive properties was investigated, and the effects of different heat treatment conditions on the magnetostriction and microstructure of the alloy rods were also examined. The saturation magnetostriction value of Fe₈₀Ga₂₀ can reach to 240 · 10⁻⁶ under a compressive stress of 20 MPa. The Fe₈₀Ga₁₁Al₉ alloy has many good properties, such as low hysteresis, high linearity of the magnetostriction curve, and low saturated magnetic field, which make it a potential candidate for magnetostrictive actuator and transducer applications. It is found that subgrains have little influence on the magnetostriction of Fe-Ga alloys.

Keywords

iron-gallium alloys / polycrystals / aluminum / magnetostriction / compressive stress

References

[1] Clark AE, Restorff JB, Wun-Fogle M, Lograsso TA, Schlagel DL. Magnetostrictive properties of body-centered cubic Fe-Ga and Fe-Ga-Al alloys. IEEE Trans. Magn., 2000, 36(5): 3238.

[2] Clark AE, Wun-Fogle M, Restorff JB, Lograsso TA, Cullen JR. Effect of quenching on the magnetostriction on Fe_1−xGa_x (0.13 < x < 0.21). IEEE Trans. Magn., 2001, 37(4): 2678.

[3] Clark AE, Hathaway KB, Wun-Fogle M, Restorff JB, Lograsso TA, Keppens VM, Petculescu G, Taylor RA. Extraordinary magnetoelasticity and lattice softening in bcc Fe-Ga alloys. J. Appl. Phys., 2003, 93(10): 8621.

[4] Wun-Fogle M, Restorff JB, Clark AE. Magnetomechanical coupling in stress-annealed Fe-Ga (Galfenol) alloys. IEEE Trans. Magn., 2006, 42(10): 3120.

[5] Fang ML, Zhu J, Golovin IS, Li JH, Yuan C, Gao XX. Internal friction in (Fe₈₀Ga₂₀)_99.95(NbC)_0.05 alloy at elevated temperatures. Intermetallics., 2012, 29, 133.

[6] Fang ML, Zhu J, Li JH, Gao XX. Low-frequency damping behavior of (Fe₈₃Ga₁₇)_97.25Cr₂B_0.75 sheets. Intermetallics., 2011, 19, 1804.

[7] Yasuda HY, Oda Y, Aoki M, Fukushima K, Umakoshi Y. Multimode pseudoelasticity in Fe-23.8at% Ga single crystals with D0₃ structure. Intermetallics, 2008, 16(11–12): 1298.

[8] Datta S, Atulasimha J, Flatau AB. Figures of merit of magnetostrictive single crystal iron-gallium alloys for actuator and sensor applications. J. Magn. Magn. Mater., 2009, 321(24): 4017.

[9] Chang GW, Chen SY, Li QC, Yue XD, Qi YH. Research of {0001} crystal orientation for magnesium alloys solidified in a fashion of cellular crystals. Int. J. Miner. Metall. Mater., 2012, 19(2): 136.

[10] Noodam J, Sirisathitkul C, Matan N, Rattanasakulthong W, Jantaratana P. Magnetic properties of NdFeB-coated rubberwood composites. Int. J. Miner. Metall. Mater., 2013, 20(1): 65.

[11] J. Appl. Phys., 2005, 98(12)

[12] Golovin IS, Belamri Z, Hamana D. Internal friction, dilatometric and calorimetric study of anelasticity in Fe-13at.% Ga and Fe-8at.% Al-3at.% Ga alloys. J. Alloys Compd., 2011, 509(32): 8165.

[13] Wun-Fogle M, Restorff JB, Clark AE. Magnetostriction of stress-annealed Fe-Ga and Fe-Ga-Al alloys under compressive and tensile stress. J. Intell. Mater. Syst. Struct., 2006, 17(2): 117.

[14] Srisukhumbowornchai N, Guruswamy S. Large magnetostriction in directionally solidified FeGa and FeGaAl alloys. J. Appl. Phys., 2001, 90(11): 5680.

[15] Cullen JR, Clark AE, Wun-Fogle M, Restorff JB, Lograsso TA. Magnetoelasticity of Fe-Ga and Fe-Al alloys. J. Magn. Magn. Mater., 2001, 226–230, 948.