Structure and properties of high damping Fe-Ga based alloy

Golovin, I.S.; Palacheva, V.V.; Emdadi, Aliakbar; Zadorozhnyy, M.Yu.; BAZLOV, A. I.; GORSHENKOV, M. V.; Поздняков, А. В.; SAVCHENKO, E. S.; CIFRE, J.; BARBIN, R.; ZHU, J.; GOLOVIN, S. A.

doi:10.4149/km_2015_4_267

Cited by 7 publications

(7 citation statements)

References 19 publications

(34 reference statements)

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“…The damping capacity of the Fee5.4Ale0.05Ti alloy continuously decreases with an increase in the static strain in the range 2.0e15 Â 10 À4 . These results are in agreement with the results for Fee15Cr, Fee6Al [47,48], FeeGaeAl [49], and Fee15Cre2.5Moe1.0Ni [40] ferromagnetic high damping alloys. The maximum strain amplitude ε max and the maximum damping capacity Q À1 respectively shift to higher and lower values with an increase of the static stress.…”

Section: Effect Of Testing Methods and Static Stresssupporting

confidence: 94%

Study of damping capacity of Fe–5.4Al–0.05Ti alloy

Emdadi

Nartey

et al. 2015

Journal of Alloys and Compounds

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Section: Effect Of Testing Methods and Static Stresssupporting

confidence: 94%

Study of damping capacity of Fe–5.4Al–0.05Ti alloy

Emdadi

Nartey

et al. 2015

Journal of Alloys and Compounds

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“…This inconsistency (paradox) was noticed in several above-mentioned and other papers, e.g., [ 127 ]. Only once we observed damping as high as Q h −1 = 0.12 [ 38 ] in Fe–Ga once at forced vibrations. However, since it could not be reproduced later, we must consider this result an artifact possibly caused by inner damage of the sample.…”

Section: Anelastic Effects In Binary Fe–ga and Ternary Fe–ga-based Al...mentioning

confidence: 93%

Section: Anelastic Effects In Binary Fe–ga and Ternary Fe–ga-based Al...mentioning

confidence: 99%

“…Damping capacity strongly depends on the measuring method; as a rule of thumb, it is higher if free decay vibrations are used and lower in case of forced vibrations [ 38 ]. Three-point bending tests exhibit higher damping values compared to single cantilever tests due to different stress distribution in the same samples [ 38 ]. To prove the hypothesis about the influence of clamping force on the samples’ performance, ADIF tests using four different standard screwdriver forces to clamp a sample in the DMA were carried out [ 86 ].…”

Section: Anelastic Effects In Binary Fe–ga and Ternary Fe–ga-based Al...mentioning

confidence: 99%

“…Our studies of thermally activated (Snoek and Zener relaxations), transient (due to A2 ↔ D0 3 , D0 3 → L1 2 , L1 2 → D0 19 , D0 19 → B2 phase transitions), and amplitude-dependent (damping) effects in Fe–Ga alloys were strengthened by cooperation with colleagues from China, Spain, Switzerland, Taiwan, and the US. Studies of phase transitions were supported by parallel real-time neutron diffraction measurements at JINR, Dubna [ 24 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ]. A review of frequency- and temperature-dependent anelastic effects in Fe–Ga alloys was presented by the author of this paper at the 18th International Conference on Internal Friction and Mechanical Spectroscopy (ICIFMS-18, Brazil, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Anelastic Effects in Fe–Ga and Fe–Ga-Based Alloys: A Review

Golovin

2023

Materials

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Fe–Ga alloys (GalFeNOLs) are the focus of attention due to their enhanced magneto-elastic properties, namely, magnetostriction in low saturation magnetic fields. In the last several years, special attention has been paid to the anelastic properties of these alloys. In this review, we collected and analyzed the frequency-, amplitude-, and temperature-dependent anelasticity in Fe–Ga and Fe–Ga-based alloys in the Hertz range of forced and free-decay vibrations. Special attention is paid to anelasticity caused by phase transitions: for this purpose, in situ neutron diffraction tests with the same heating or cooling rates were carried out in parallel with temperature dependencies measurements to control ctructure and phase transitions. The main part of this review is devoted to anelastic effects in binary Fe–Ga alloys, but we also consider ternary alloys of the systems Fe–Ga–Al and Fe–Ga–RE (RE—Rare Earth elements) to discuss similarities and differences between anelastic properties in Fe–Ga and Fe–Al alloys and effect of RE elements. We report and discuss several thermally activated effects, including Zener- and Snoek-type relaxation, several transient anelastic phenomena caused by phase transitions (D03 ↔ A2, D03 → L12, L12 ↔ D019, D019 ↔ B2, Fe13Ga9 → L12+Fe6Ga5 phases), and their influence on the above-mentioned thermally activated effects. We also report amplitude-dependent damping caused by dislocations and magnetic domain walls and try to understand the paradox between the Smith–Birchak model predicting higher damping capacity for materials with higher saturation magnetostriction and existing experimental results. The main attention in this review is paid to alloys with 17–20 and 25–30%Ga as the alloys with the best functional (magnetostriction) properties. Nevertheless, we provide information on a broader range of alloys from 6 to 45%Ga. Due to the limited space, we do not discuss other mechanical and physical properties in depth but focus on anelasticity. A short introduction to the theory of anelasticity precedes the main part of this review of anelastic effects in Fe–Ga and related alloys and unsolved issues are collected in summary.

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