Strong, ductile, and low-field-magnetostrictive alloys based on Fe-Ga

• Published in: Scripta materialia Vol. 43; no. 3; pp. 239 - 244
• Main Authors: Guruswamy, S, Srisukhumbowornchai, N, Clark, A.E, Restorff, J.B, Wun-Fogle, M
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Ltd 20.07.2000; Elsevier Science
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Ductile; Exact sciences and technology; Fe and its alloys; Ferromagnetic hysteresis; Iron-gallium alloys; Magnetic properties and materials; Magnetostriction effects; Metals. Metallurgy; Physics; Studies of specific magnetic materials; X-ray diffraction; X-ray diffraction; Ductile; Iron-gallium alloys; Magnetostriction effects; Ferromagnetic hysteresis; Magnetization curve; Magnetostriction; Ductility; High strength alloy; Ferromagnetic materials; Mechanical properties; Magnetic hysteresis; XRD; Experimental study; Gallium alloys; Iron base alloys; Magnetic properties
• ISSN: 1359-6462; 1872-8456
• DOI: 10.1016/S1359-6462(00)00397-3

It is shown that the addition of Ga significantly enhances the magnetostriction of Fe as expected. Fe-Ga alloys with a (110) texture along the specimen axis showed magnetostriction values of up to 110x10 exp -6 under high compressive stresses and showed negligible hysteresis. Much higher values, as much as three to four times the above values can be obtained in [002] oriented crystals and [002] textured polycrystalline Fe-Ga alloys. The (Fe sub 85 Ga sub 15 ) sub 99 (NbC) sub 1 alloy exhibited high yield strength, ultimate strength and ductility values. The results indicate that an excellent combination of strength and ductility can be obtained in Fe-Ga bcc terminal solid solution alloys containing up to 20 a% Ga. These alloys will be attractive in many magnetostrictive applications.