Study of the brittle behaviour of annealed Fe-6.5 wt%Si ribbons produced by planar flow casting

Viala, B.; Degauque, J.; Fagot, M.; Baricco, Marcello; Ferrara, E.; Fiorillo, F.

doi:10.1016/0921-5093(96)10188-x

Cited by 94 publications

(50 citation statements)

References 16 publications

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“…movement of grain boundaries is impeded due to dislocation piling, but recovery process starts near 530 °C. As expected, the amount of silicon influences dislocation mobility through two main contributions, the increase in Peierls Nabarro force and the ordering, which raises stacking fault energy [73] . The influence of ordering in stacking fault energy has been studied in other ordered alloys [74] .…”

Section: Positron Annihilation and Ebsd Deformation Recovery And Rementioning

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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Section: Positron Annihilation and Ebsd Deformation Recovery And Rementioning

confidence: 99%

A review of ordering phenomena in iron-silicon alloys

Villafañe¹,

Houbaert²

2013

REVMETAL

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“…In addition, the peak positions of α-Fe shifted to lower In order to observe the microstructural evolution, selected area diffraction (SAD) patterns and two-beam and Lorentz images of silicon steels were obtained and are shown in Figs. 4 and 5. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the magnetostriction value of the silicon steel is reduced to almost zero when the silicon content reaches 6.5 wt%, which can result in a sharp reduction in hysteresis loss. [3][4][5][6] Nevertheless, the application of 6.5 wt% silicon steel to transformers and motor cores has been limited because it is too brittle for use in conventional rolling techniques. The brittleness of high silicon steel stems from the formation of two different ordered phases, B2 (FeSi) and D03 (Fe3Si), 3,4,[7][8][9] which are known to alter the magnetic properties of the steel.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6] Nevertheless, the application of 6.5 wt% silicon steel to transformers and motor cores has been limited because it is too brittle for use in conventional rolling techniques. The brittleness of high silicon steel stems from the formation of two different ordered phases, B2 (FeSi) and D03 (Fe3Si), 3,4,[7][8][9] which are known to alter the magnetic properties of the steel. 10,11) However, the specific relationship between the ordered phases and the magnetic properties in high silicon steel is still unclear.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Anti-phase Boundary on the Iron Loss of Grain Oriented Silicon Steel

Jung¹,

Kim²,

Kim³

et al. 2011

ISIJ Int.

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We present a systematic analysis of the iron loss behavior of grain oriented silicon steels containing different Si contents using transmission electron microscopy. When the silicon content changed in the range of 3-6.5 wt%, the iron loss showed a convex profile and the maximum iron loss was observed in 5.2 wt% silicon steel. This maximum iron loss should be ascribed to the formation of antiphase boundaries that acted as pinning centers in the magnetic domain wall.KEY WORDS: grain oriented silicon steel; iron loss; anti-phase boundary; magnetic domain wall.

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“…Thus the hysteresis and eddy current losses of the silicon steel should be decreased further. [1][2][3] Among numerous factors [4][5][6][7] influencing the iron loss of silicon steel, the increase of silicon contents is recognized as the most effective way to improve the efficiency of high frequency transformers and motors by the reduction in eddy current loss. For example, the specific resistivity of the silicon steel increases from 48 to 82 μΩ-cm when the silicon contents change from 3 to 6.5 wt%.…”

Section: Introductionmentioning

confidence: 99%

Influence of Low Temperature Heat Treatment on Iron Loss Behaviors of 6.5 wt% Grain-oriented Silicon Steels

Jung

Soh

et al. 2012

ISIJ Int.

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In this study, the influence of low temperature heat treatment on iron loss behaviors has been investigated in 6.5 wt% grain-oriented silicon steels fabricated by a SiO2 textile method. Heat-treatment under hydrogen atmosphere was carried out for 1 hr in the temperature range of 500 to 800°C. As a result, the minimum iron loss was obtained in a sample annealed at 600°C. Transmission electron microscopy analysis showed that B2 and D03 antiphase domains existed in all heat-treated samples but D03 size was maximized after 600°C heat-treatment. In addition, magnetic domains cut through these antiphase boundaries. Therefore, the low iron loss of the sample annealed at 600°C should be ascribed to the reduction in the area of the antiphase boundaries which acted as pinning centers in the magnetic domain walls.KEY WORDS: grain-oriented silicon steel; 6.5 wt% silicon steel; low temperature heat treatment; B2 and D03 antiphase boundaries.

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Study of the brittle behaviour of annealed Fe-6.5 wt%Si ribbons produced by planar flow casting

Cited by 94 publications

References 16 publications

A review of ordering phenomena in iron-silicon alloys

A review of ordering phenomena in iron-silicon alloys

Effects of Anti-phase Boundary on the Iron Loss of Grain Oriented Silicon Steel

Influence of Low Temperature Heat Treatment on Iron Loss Behaviors of 6.5 wt% Grain-oriented Silicon Steels

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