Mechanisms of anelasticity in Fe–13Ga alloy

Golovin, I.S.; Rivière, A.

doi:10.1016/j.intermet.2010.10.017

Cited by 30 publications

(27 citation statements)

References 9 publications

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“…The FDIF tests of this peak in Fe--13Ga gave following values for constant temperature: H = 0.85 eV and τ 0 = 10 −6 [7], which are very different from TDIF results at instant heating rate (2.4 eV and τ 0 = 10 −17 [14]), and leave the interpretation of the physical mechanism of this effect open. The frequency independent P Tr peak appears in alloys with higher Ga content and it may influence the P2 peak parameters.…”

Section: Resultsmentioning

confidence: 56%

“…TDIF original results have been presented in our papers [7,[11][12][13][14][15][16][17]. In this paper, we suggest two schemes which describe most of the experimental data (Fig.…”

Section: Resultsmentioning

confidence: 96%

“…FDIF tests were carried out using forced vibrations at DMA (bending, f from 0.01 to 200 Hz, ε 0 = 0.007 %) and pendulum (torsion, 0.0001-50 Hz, ε 0 = 0.0005 % [7]). Figure.…”

Section: Resultsmentioning

confidence: 99%

“…5b). According to activation parameters these peaks (Table 2) were interpreted as the Snoek type peaks with two components Fe-C-Fe and Fe-C-(Ga,Al) for alloys containing up to 13 % Ga [7,11]. Addition of strong carbide forming Nb eliminates these peaks and annealing leads to decrease of IF nearly to the background level shown by the dotted line.…”

Section: Resultsmentioning

confidence: 99%

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Structure and properties of high damping Fe-Ga based alloy

Golovin¹,

Palacheva²,

Emdadi³

et al. 2016

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Fe-Ga and Fe-Ga-Al alloys are studied by different mechanical spectroscopy techniques, conventional microscopy, DSC and dilatometry. Main contribution to amplitude dependent damping is assigned to magnetomechanical damping, which is very sensitive to structural state of alloys. Both temperature dependent thermally activated relaxation effects and effects due to phase transitions are discussed in terms of alloy structures and their ordering.K e y w o r d s : Fe-Ga, internal friction, damping, ordering

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Section: Resultsmentioning

confidence: 56%

“…TDIF original results have been presented in our papers [7,[11][12][13][14][15][16][17]. In this paper, we suggest two schemes which describe most of the experimental data (Fig.…”

Section: Resultsmentioning

confidence: 96%

“…FDIF tests were carried out using forced vibrations at DMA (bending, f from 0.01 to 200 Hz, ε 0 = 0.007 %) and pendulum (torsion, 0.0001-50 Hz, ε 0 = 0.0005 % [7]). Figure.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Structure and properties of high damping Fe-Ga based alloy

Golovin¹,

Palacheva²,

Emdadi³

et al. 2016

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show abstract

“…Several internal friction effects caused by thermally activated phenomena have been discovered in paper [9]: the Snoek-type relaxation, composed of the P1 and P2 peaks due to carbon atom jumps in the Fe-C-Fe and Fe-C-Ga surrounding (total peak is denoted as the P 1/2 peak), the Zener relaxations due to reorientation of Ga-Ga atom pairs denoted as the P4 peak, and the grain boundary relaxation -the P5 peak. At the same time, authors [9] have reported two anelastic effects denoted as the P3 and P4 peaks in the temperature range from 150 to 300 • C the origin of which were not well explained.…”

Section: Introductionmentioning

confidence: 99%

Internal friction, dilatometric and calorimetric study of anelasticity in Fe–13at.% Ga and Fe–8at.% Al–3at.% Ga alloys

Golovin

Belamri

Hamana

2011

Journal of Alloys and Compounds

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Interaction of Trace Rare‐Earth Dopants and Nanoheterogeneities Induces Giant Magnetostriction in Fe‐Ga Alloys

Jiang

et al. 2018

Adv Funct Materials

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The discovery of a tenfold increase in magnetostriction of Fe by alloying nonmagnetic Ga was a breakthrough in magnetostrictive materials. The large magnetostriction is attributed to tetragonal nanoheterogeneities dispersed in the bcc matrix. A further remarkable fivefold increase is achieved by trace rare earth doping (<1 at%) up to a value of ≈1500 ppm, more than 50 times that of pure iron. However, it remains a mystery why trace rare earth dopants can induce such giant magnetostriction. Here, it is found that interaction of rare earth dopants with the nanoheterogeneities produces the giant magnetostriction, through a combination of experimental studies, firstprinciples calculation and phase field simulations. The dopants tend to enter the nanoheterogeneities, increasing their distortion thereby creating a larger tetragonal distortion of the matrix as well as increased magnetocrystalline anisotropy. A mesoscopic model is developed using phase field simulation showing that the bulk tetragonal distortion arises mainly from those nanoheterogeneities with fixed Ga-Ga pairs parallel to the applied magnetic field. Increased tetragonal distortion of the doped nanoheterogeneities leads to further distortion of the matrix. The results deepen the understanding of heterogeneous magnetostriction, and will guide the search for new magnetic materials with giant magnetostriction.

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Mechanisms of anelasticity in Fe–13Ga alloy

Cited by 30 publications

References 9 publications

Structure and properties of high damping Fe-Ga based alloy

Structure and properties of high damping Fe-Ga based alloy

Internal friction, dilatometric and calorimetric study of anelasticity in Fe–13at.% Ga and Fe–8at.% Al–3at.% Ga alloys

Interaction of Trace Rare‐Earth Dopants and Nanoheterogeneities Induces Giant Magnetostriction in Fe‐Ga Alloys

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