Magnetostriction and Crystallographic Texture in Rolled and Annealed Fe-Ga Based Alloys

Abstract

Results that demonstrate the selective development of {100}<001> preferred texture in polycrystalline Fe81.3Ga18.7 plus B (0.5∼1.0 at.%) and S (∼0.05 at.%) alloys using a conventional rolling and annealing processes are presented in this work. We found that boron improved ductility by enhancing grain boundary cohesion during rolling and sulfur played an important role in controlling the surface energy and formation of the selective growth of {100} grains during annealing. The as-rolled (Fe81.3Ga18.7)+0.5 at.%B+0.005 at.%S sheet had some {100}<011> and near {111}<011> texture corresponding to α-fiber texture parallel to the rolling direction. The near {100}<001> sheet texture was formed in sheet that was annealed at 1200°C for 2h (198 ppm), while the texture of sheet annealed at 1100°C for 4h (165 ppm) was closer to {110}<001>. The maximum observed magnetostriction of 220 ppm was obtained as a result of a double annealed, first at 1000°C for 6h and then at 1200°C for 1h, with the resultant texture closer to the ideal {100}<001> than the less desirable {100}<011>.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    A. E. Clark, K. B. Hathaway, M. Wun-Fogle, J. B. Restorff, T. A. Lograsso, V. M. Keppens, G. Petculescu and R. A. Taylor : Extraordinary magnetoelasticity and lattice softening in bcc Fe-Ga alloys. J. Appl. Phys. 93, 8621 (2003).

    CAS  Article  Google Scholar 

  2. 2.

    N. Srisukhumbowornchai and S. Guruswamy : Crystallographic textures in rolled and annealed Fe-Ga and Fe-Al alloys. Metall. and Mater. Trans. A 35A, 2963 (2004).

    CAS  Article  Google Scholar 

  3. 3.

    D. Köhler : Promotion of cubic grain growth in 3% silicon iron by control of annealing atmosphere composition. J. Appl. Phys. 31, 408S (1960).

    Article  Google Scholar 

  4. 4.

    J. J. Kramer : Nucleation and growth effects in thin ferromagnetic sheets: A review focusing on surface energy-induced secondary recrystallization. Metall. Trans. A 23, 1987 (1992).

    Article  Google Scholar 

  5. 5.

    N. H. Heo, K. H. Chai and J. G. Na : Correlation between interfacial segregation and surface-energy-induced selective grain growth in 3% silicon-iron alloy. Acta Mater. 48, 2901 (2000).

    CAS  Article  Google Scholar 

  6. 6.

    S. M. Na and A. B. Flatau : Magnetostriction and surface-energy-induced selective grain growth in rolled Galfenol doped with sulfur, in Active Materials: Behavior and Mechanics, edited by William D. Armstrong (Proc. of SPIE 5761, Bellingham, WA, 2005) pp. 192–199.

    Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Suok-Min Na.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Na, SM., Alison, B.F. Magnetostriction and Crystallographic Texture in Rolled and Annealed Fe-Ga Based Alloys. MRS Online Proceedings Library 888, 610 (2005). https://doi.org/10.1557/PROC-0888-V06-10

Download citation