Influence of composition and heat treatment on damping and magnetostrictive properties of Fe–18%(Ga + Al) alloys

Journal Article · Wed Jul 16 00:00:00 EDT 2014 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2014.05.044· OSTI ID:1227144

Golovin, I. S. ^[1]; Palacheva, V. V. ^[1]; Zadorozhnyy, V. Yu. ^[1]; Zhu, J. ^[2]; Jiang, H. ^[2]; Cifre, J. ^[3]; Lograsso, T. A. ^[4]

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1. National Univ. of Science and Technology MISIS, Moscow (Russia)
2. Univ. of Science and Technology Beijing, Beijing (P.R. China)
3. Univ. de les Illes Balears, Palma de Mallorca (Spain)
4. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

The structure, magnetostriction and damping properties of Fe₈₂Ga_(18–x)Al_x (x = 0, 5, 8, 12) alloys were analyzed. The anelastic response of Fe–18(Ga + Al) alloys was studied as a function of temperature (from 0 to 600 °C), frequency (from 0.01 to 200 Hz) and amplitude (from 0.0004% to 0.2%) of forced vibrations. The origin of the relatively high damping capacity of Fe–Ga–Al alloy at room temperature was determined by applying a magnetic field and different heat treatment regimes. The substitution of Ga by Al in Fe–18% Ga alloys was found to decrease magnetostriction and damping. The heat treatment of alloys influences the damping capacity of alloys more than variations of their chemical compositions. Thermally activated frequency and temperature-dependent anelastic effects in Fe–Ga–Al alloys were analyzed and the corresponding activation parameters for relaxation processes were evaluated. Internal friction effects caused by structural transformations were recorded and were found to be consistent with the A2 → D0₃ → L1₂ reaction. Thus, the physical mechanisms for all anelastic effects are discussed.

• Research Organization: Ames Lab., Ames, IA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1227144
• Alternate ID(s): OSTI ID: 1495887
• Report Number(s): IS-J-8727; PII: S1359645414004005
• Journal Information: Acta Materialia, Vol. 78, Issue C; ISSN 1359-6454
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Fe–Ga–Al alloys
damping
magnetostriction
structure
ordering