Mechanical spectroscopy of atomic ordering in Fe-(16−21)Ga-RE alloys

Golovin, I.S.; Palacheva, V.V.; Mohamed, A.K.; Cifré, J.; Dubov, L Yu; Samoylova, Nataliya Yu.; Балагуров, А. М.

doi:10.1016/j.jallcom.2021.158819

Cited by 20 publications

(17 citation statements)

References 42 publications

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“…In Fe-Al alloys up to 50 at.% Al, no other phases except A2, D0 3 and B2 were detected [15], including when they were heated right up to melting. In cast compositions Fe 100−x Ga x up to x ≈ 30, the situation is the same, but at x > 30, Fe13Ga9 intermetallide with a monoclinic structure [22] begin to form in them. Slow heating of the compositions Fe 100−x Ga x with x > 24 leads to the appearance of phases L1 2 and D0 19 , derived from A1 and A3-structures, and for x > 32, there is also a monoclinic phase α-Fe 6 Ga 5 .…”

Section: Discussionmentioning

confidence: 95%

“…The first is the data on the bulk phase heterogeneity of the material, which manifests itself as the formation of nano-secretions (clusters) of an ordered phase in an unordered or less ordered matrix. The second groupevidence of the formation of non-standard tetragonal ordered phases for Fe-Ga, such as m-D0 3 (L6 0 ) or D0 22 . Numerous examples of both types of inhomogeneities are given in our recent reviews [4] and [5], the first of which mainly discusses the material properties of a wide range of iron-based alloys, and the secondstructural studies of binary Fe-Ga-and Fe-Al-alloys.…”

Section: Introductionmentioning

confidence: 99%

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Structures and phase transitions in Fe-Ga-Al alloys

Балагуров

Бобриков

Sumnikov

et al. 2022

Physics of the Solid State

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Evolution of structural phases and microstructural cast state of Fe100-(x+y)GaxAly compositions in the range of 17≤(x+y)≤39 at.% was studied in neutron diffraction experiments performed with high resolution and in continuous temperature scanning mode when heated to ~ 900oC and subsequent cooling. It is established that the structures of the cast states of triple alloys in the studied range of Ga and Al content basically repeat the structure of the double compositions Fe100-xGax up to x~ 30 and Fe100-yAly up to y~ 50. Namely, only cubic phases (A2, D03 and B2) are observed in them, and hexagonal (A3, D019) and monoclinic (such as Fe13Ga9 or α-Fe6Ga5) there are no phases characteristic of the Fe-Ga system. The expansion of the range of formation of cubic phases formed on the basis of the BCC cell in ternary alloys in comparison with Fe100-xGax indicates the role of Al in the stabilization of these structures. Keywords: alloys Fe-Ga, Fe-Al, Fe-Ga-Al, structural phase transitions, neutron diffraction, magnetostriction.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Structures and phase transitions in Fe-Ga-Al alloys

Балагуров

Бобриков

Sumnikov

et al. 2022

Physics of the Solid State

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“…Several dozens of research papers are focused on particular elastic and anelastic effects in different Fe–Ga alloys. The main papers which report anelastic effects in Fe–Ga alloys in a wide range of Ga concentrations used for this review are [ 39 , 49 , 59 , 60 , 61 ]. As a rule of thumb, most authors denoted in their papers the thermally activated effects/peaks as P1, P2, P3, etc., and the transient effects as P Tr1 , P Tr2 , P Tr3 , etc.…”

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

confidence: 99%

“…details and proposed new approaches for better understanding amplitude-dependent damping mechanisms in Fe–Ga alloys [ 52 , 53 , 54 , 55 , 56 , 57 ]. Most recently, these results were presented at the 19th ICIFMS (2022, Rome) [ 58 , 59 , 60 , 61 , 62 , 63 , 64 ]. An interesting analysis of the core loss separation and magnetic Barkhausen noise at the high-frequency range is recently reported for Fe–19Ga–RE alloys by Bircakova et al [ 65 ].…”

Section: Introductionmentioning

confidence: 99%

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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“…В сплавах Fe-Al вплоть до 50 аt.% Al никаких других фаз, кроме А2, D0 3 и B2, не обнаружено [15], в том числе, и при их нагревах вплоть до плавления. В литых составах Fe 100−x Ga x до x ≈ 30 ситуация такая же, но при x > 30 в них начинает образовываться интерметаллид Fe13Ga9 с моноклинной структурой [22]. Медленный нагрев составов Fe 100−x Ga x с x > 24 приводит к возникновению фаз L1 2 и D0 19 , производных от А1 и А3-структур, а при x > 32 еще и моноклинной фазы α-Fe 6 Ga 5 .…”

Section: обсуждение и выводыunclassified

Структуры и фазовые переходы в Fe-Ga-Al сплавах

Балагуров¹,

Бобриков²,

Сумников³

et al. 2022

Физика Твердого Тела

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Эволюция структурных фаз и микроструктурного литого состояния составов Fe100-(x+y)GaxAly в диапазоне 17≤(x+y)≤39 at.% изучена в нейтронных дифракционных экспериментах, выполненных с высоким разрешением и в режиме непрерывного сканирования по температуре при нагреве до ~ 900oС и последующем охлаждении. Установлено, что структуры литых состояний тройных сплавов в изученном диапазоне содержания Ga и Al в основных чертах повторяют структуру двойных составов Fe100-xGax до x~ 30 и Fe100-yAly до y~ 50. А именно, в них наблюдаются только кубические фазы (А2, D03 и B2), а гексагональные (A3, D019) и моноклинные (типа Fe13Ga9 или α-Fe6Ga5) фазы, характерные для системы Fe-Ga, отсутствуют. Расширение диапазона образования кубических фаз, образующихся на основе ОЦК-ячейки, в тройных сплавах по сравнению с Fe100-xGax, свидетельствует о роли Al в стабилизации этих структур. Ключевые слова: сплавы Fe-Ga, Fe-Al, Fe-Ga-Al, структурные фазовые переходы, дифракция нейтронов, магнитострикция.

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Mechanical spectroscopy of atomic ordering in Fe-(16−21)Ga-RE alloys

Cited by 20 publications

References 42 publications

Structures and phase transitions in Fe-Ga-Al alloys

Structures and phase transitions in Fe-Ga-Al alloys

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

Структуры и фазовые переходы в Fe-Ga-Al сплавах

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