Strain rate sensitivity and ductile-brittle behavior of polycrystalline Fe-Si alloys with 2.5, 3.5, and 4.5 wt pct Si

Aronsson, B.; Grånäs, L.

doi:10.1007/bf02664240

Cited by 14 publications

(3 citation statements)

References 13 publications

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“…At the early stage of the compression the material accommodates part of the deformation by mechanical twinning, since the critical threshold of appr. 700 MPa is clearly exceeded [4]. Deformation twins with an average thickness of ~5 µm and interspaces between them of ~12 µm (cf.Fig.…”

Section: Resultsmentioning

confidence: 99%

A Study of Texture Evolution during Deformation and Annealing in Fe 3 wt.-% Si by Orientation Contrast Microscopy

Calvillo¹,

Petrov

Houbaert

et al. 2007

MSF

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Electrical steels, in particular Fe-Si alloys, are used as magnetic flux carrier in transformers and motors because of their excellent magnetic properties. They owe these magnetic properties in part to the presence of specific texture components such as the Goss ({110} <001>) or the cube components ({001} <010>), but also to the chemical composition which is optimum with 6.5 wt. % Si. This high silicon content provides a stable BCC lattice structure to the alloy over the entire solid state domain, but also renders the material more brittle. This embrittlement, which is induced by ordering phenomena, makes it impossible to produce the alloy in a conventional rolling process unless a specific thermomechanical route at high temperature is applied. In order to examine the working behaviour of high Si electrical steels, a series of room temperature plane strain compression tests was carried out on a Fe-3%Si alloy in hot band condition. The samples were compressed with a constant strain rate of 20 s-1 to a reduction of 10, 35 and 70% and subsequently annealed for different times at 800 and 900°C in an electrical furnace without protecting atmosphere. The hot rolled microstructure displayed an average grain size of 195 7m and the texture showed on the cube component ({001} <010>) of maximum 5x random levels. After plane strain compression the samples developed the conventional α (<110> // RD) / γ (<111> // ND) fibre texture by plastic shear which was also accommodated, in part, by mechanical twinning. With regard to the annealed material, it was observed that the recrystallisation started in grains with the higher stored energy and within the shear bands. After a reduction of 70% the samples that were annealed at 800°C for 4 hours displayed an average grain size of 27 7m and a relative maximum of 4x random on the cube component. Also other less intense components such as the rotated cube ({001} <110>) and the Goss ({110} <001>) were present in the annealing texture. The samples that were annealed at 900°C, after a reduction of 70%, were characterized by an average grain size of 36 7m and by the appearance of the {111} <121> γ fibre component with an intensity of 4.7.

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Section: Resultsmentioning

confidence: 99%

A Study of Texture Evolution during Deformation and Annealing in Fe 3 wt.-% Si by Orientation Contrast Microscopy

Calvillo¹,

Petrov

Houbaert

et al. 2007

MSF

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“…[6] However, the high Si content (>3 wt%) of Fe-Si alloys often leads to brittle plastic deformation that may cause serious problems during EMV parts manufacturing. [7,8] To deal with the mechanical brittleness of Fe-Si alloys, rapid solidification techniques have been applied to suppress the B2 and DO 3 -ordered brittle phases, which are known to reduce the ductility of Fe-Si alloys. [9,10] Traditionally, EMV motor cores were manufactured by producing and stacking thin laminations via a melt-spinning process [11,12] ; however, complex-shaped EMV parts are difficult to manufacture using traditional methods.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Laser‐Powder Bed Fusion Processed Fe–4.5Si Alloy via Response Surface Methodology

Gwak

Park

Jeong

et al. 2022

steel research int.

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“…al. 15) investigated stress-strain behaviors of Si steels; however, there has been no systematic study of the effect of pre-deformation and strain rate on fracture behavior. This study aims to clarify the fracture behavior in Fe-high Si alloy using the room temperature tensile tests at wide range of strain rates (10 −5 to 10 0 /s) to clarify the effect of pre-deformation on the fracture behavior due to strain rate change.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pre-Deformation on Fracture Behavior Transition due to Strain-Rate Change in Fe-5%Si Alloy

Mizuguchi

Oouchi

Tanaka

2014

J. Soc. Mat. Sci., Japan

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Strain rate sensitivity and ductile-brittle behavior of polycrystalline Fe-Si alloys with 2.5, 3.5, and 4.5 wt pct Si

Cited by 14 publications

References 13 publications

A Study of Texture Evolution during Deformation and Annealing in Fe 3 wt.-% Si by Orientation Contrast Microscopy

A Study of Texture Evolution during Deformation and Annealing in Fe 3 wt.-% Si by Orientation Contrast Microscopy

Optimization of Laser‐Powder Bed Fusion Processed Fe–4.5Si Alloy via Response Surface Methodology

Effect of Pre-Deformation on Fracture Behavior Transition due to Strain-Rate Change in Fe-5%Si Alloy

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