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

The structure, magnetostriction and damping properties of Fe82Ga(18?x)Alx(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! L12reaction. The physical mechanisms for all anelastic effects are discussed
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [4]
  1. National University of Science and Technology MISIS
  2. University of Science and Technology Beijing
  3. Universitat de les Illes Balears
  4. Ames Laboratory
Publication Date:
OSTI Identifier:
Report Number(s):
IS-J 8476
Journal ID: ISSN 1359-6454
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Acta Materialia; Journal Volume: 78
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Fe-Ga-Al alloys; Damping; Magnetostriction; Structure; Ordering