Structure and anelasticity of ordered and disordered Fe–Ge alloys

Golovin, I.S.; Neuhäuser, H.; Sinning, H.‐R.; Siemers, Carsten

doi:10.1016/j.intermet.2009.12.031

Cited by 15 publications

(9 citation statements)

References 35 publications

(50 reference statements)

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“…its temperature depends on frequency (with rough estimation of activation energy to be below 1 eV). These "low temperature" peaks are similar to the peaks we have observed earlier in Fe-12 and -19%Ge alloys [9]. Increase in amplitude of vibrations leads to less pronounced separation between P LT 1 and P LT 2 peaks.…”

Section: Resultssupporting

confidence: 86%

“…in alloys in which the alloying element is not a (strong) carbide forming element and it has a tendency to ordering in bcc iron. In more details this similarity was discussed in paper [9]. FeeGa as well as FeeAl alloys exhibit high damping capacity due to magnetomechanical damping, which might be optimized in future by producing ternary FeeAleGa alloys where aluminum is substituted by more expensive gallium which brings the alloy higher magnetostriction values.…”

Section: Frequency Dependent If At Forced Torsion Vibrating Modementioning

confidence: 98%

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Mechanisms of anelasticity in Fe–13Ga alloy

Golovin

Rivière

2011

Intermetallics

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Section: Resultssupporting

confidence: 86%

Section: Frequency Dependent If At Forced Torsion Vibrating Modementioning

confidence: 98%

Mechanisms of anelasticity in Fe–13Ga alloy

Golovin

Rivière

2011

Intermetallics

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“…In the case of figure 18, there is a small quantity of nitrogen in solution which appears at its characteristic frequency, near 1 Hz. Asymmetrical peaks indicate normally superposition of two peaks [88] . Hence, two more peaks can be described at lower frequencies [86 and 89] , which correspond to the interstitial-substitutional coupling C-Si and Si-Si Zener relaxation.…”

Section: Room Temperature Ageingmentioning

confidence: 99%

A review of ordering phenomena in iron-silicon alloys

Villafañe¹,

Houbaert²

2013

REVMETAL

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Silicon steel is an industrially-desired alloy of iron and silicon, characterised by soft magnetic properties, low eddy-current losses, and low magnetostriction. Silicon steels have narrow hysteresis cycles, making them particularly advantageous in applications using electromagnetic fields, such as transformers, generators, electric motor cores, and few other components in industry. Despite its incontestable industrial value, there is not much agreement on the atomic structure of silicon steel. Gaining better understanding of e.g. ordering processes in Fe-Si alloys could not only explain their magnetic properties, but also open opportunities to reduce their weaker characteristics, such as brittleness that adversely affects silicon steel workability and its associated high production costs. This review summarises the state-of-the-art knowledge about ordering in silicon steel and describes the most relevant experimental techniques used for studying its microstructure. In addition, the process of building the iron rich part of the Fe-Si phase diagram is explained. Lastly, the influence of order on the alloy's magnetic and mechanical properties is illustrated. KeywordsOrdering; Iron-silicon alloys; Intermetallic phases; Mechanical properties; Phase diagram. Revisión de fenómenos de orden en aleaciones hierro-silicio ResumenEl acero al silicio es una aleación de importancia industrial, caracterizada por propiedades magnéticas blandas, bajas pérdidas por corrientes de Foucault y baja magnetostricción. Los aceros al silicio tienen ciclo de histéresis estrecho, lo que es una ventaja en aplicaciones con campos electromagnéticos, como transformadores, generadores, núcleos de motores eléctricos y otros componentes industriales. A pesar de su incomparable valor industrial, no hay convenio sobre la estructura atómica del acero al silicio. Obtener mayor conocimiento sobre los procesos de orden no sólo podría explicar las propiedades magnéticas sino que también podría abrir vías para la reducción de sus características más débiles, como su fragilidad, la cual afecta negativamente a la fabricación del acero al silicio y se asocia con altos costes de producción. Esta revisión resume los últimos conocimientos sobre orden en acero al silicio y describe las técnicas experimentales más importantes usadas para estudiar su estructura. Además, se da una explicación sobre la construcción de la parte rica en hierro del diagrama de fases del Fe-Si. Por último se ilustra la influencia del orden en las propiedades magnéticas y mecánicas. Palabras claveOrden; Aleaciones hierro-silicio; Fases intermetálicas; Propiedades mecánicas; Diagrama de fases.

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“…In previous work we have shown that the degree of order and the defect configuration influence the mobility of dislocations and grain boundaries in Fe-Al [10], Fe-25at.%(Al + Si) and Fe15at.%(Al + Si) [11,12], Fe-10at.%Si [13][14][15] and in Fe-Ge alloys [16]. Main attention in Fe-Al and Fe-Ge alloys was paid as yet to Zener and Snoek-type effect, nevertheless an internal friction peak below room temperature was identified to be a dislocation related, most probably Hasiguti type effect [2,3].…”

Section: Introductionmentioning

confidence: 99%