Disparity in recrystallization of α- &amp; γ-fibers and its impact on Cube texture formation in non-oriented electrical steel

Hawezy, Diween; Birosca, S.

doi:10.1016/j.actamat.2021.117141

Cited by 31 publications

(8 citation statements)

References 44 publications

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“…Therefore, it is not surprising to see in the recrystallized grains, c-fiber exhibited a higher fraction than a-fiber, which agrees with the trend observed in other ferritic steels. [21] It is also important to note that the stored energy along the a-fiber is not homogeneously distributed, leading to inhomogeneous weakening of the a-fiber in the recrystallized grains (Figure 12). Here, it is not necessary to involve the selective growth theory to account for the development of c-fiber.…”

Section: A Microstructure Heterogeneity On Texture Evolutionmentioning

confidence: 99%

“…[17][18][19][20] The c-fiber grains exhibit a higher density of geometrically necessary dislocations (GND), i.e., higher orientation gradients and more low-angle boundaries (LABs), hence higher stored energy compared to a-fiber grains. [21,22] This affects the recovery and recrystallization processes during annealing after cold rolling, for example, the c-fiber grains show a quicker formation of new grains than a-fiber grains as the higher stored energy provides a higher driving force for nucleation (recovery). [23][24][25] Kapoor et al [26] observed faster recovery in c-fiber grains than in a-fiber grains during a quasi in-situ annealing experiment on a cold-rolled low-carbon steel.…”

Section: Introductionmentioning

confidence: 99%

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Texture Development During Annealing in a Low-Carbon Formable Steel Containing Impurities from Increased Scrap Use

Duan

Farrugia

Davis

et al. 2023

Metall Mater Trans A

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Impurities (Cu, Sn, Cr, and Ni) have been added to a low-carbon formable strip steel to simulate the scenario of increased use of scrap during steel production. Texture evolution during annealing of the cold-rolled base steel and impurity-added steel have been investigated. The impurities were shown to suppress the development of the γ-fiber texture. Meanwhile, a higher fraction of random orientations was developed in the impurity-added steel. However, the adverse effect of impurities on the γ-fiber was mitigated during annealing at higher temperatures (650 °C to 750 °C). The correlation between texture development and microstructure heterogeneity, and the effect of impurity additions on texture development are discussed. This work provides guidelines on recycling scrap for the production of low-carbon formable steels.

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Section: A Microstructure Heterogeneity On Texture Evolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Texture Development During Annealing in a Low-Carbon Formable Steel Containing Impurities from Increased Scrap Use

Duan

Farrugia

Davis

et al. 2023

Metall Mater Trans A

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“…[ 28 ] Takajo [ 29 ] observed that cube grains were formed in {114}<481> deformed structure. Hawezy [ 30 ] confirmed that {100} grains can be recrystallized and nucleated by strain‐induced boundary migration (SIBM) bulging in electrical steel, while Li [ 3 ] believed that α‐fiber grains nucleate by continuous recrystallization. Our previous research on the texture of cold rolling and recrystallization of columnar crystals shows that the texture of {114}<481> initially comes from the {100} columnar grains in the continuous casting slab, especially the cube‐oriented and {100}<021>‐oriented grains.…”

Section: Introductionmentioning

confidence: 99%

Recrystallization Behavior of Hot‐Rolled Microstructure with Texture Gradient and Texture of Final Sheet in Thin‐Gauge Electrical Steel

Tang

Yang

et al. 2022

steel research int.

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The typical feature of hot‐rolled sheets exhibits strong inhomogeneity in microstructure and texture along the thickness direction, and the latter can be named as texture gradient. Herein, the recrystallization and grain growth behaviors of the hot‐rolled sheet in a thin‐gauge nonoriented electrical steel are investigated at different normalization temperatures. The origin and the growth behavior of the main recrystallization texture {114}<481> are revealed. The results show that the texture gradient in hot‐rolled sheets leads to the difference in microstructure and texture between the surface layer and the central layer after normalization. The strong {114}<481> recrystallization texture originates in the orientation transition zone and the vicinity of the grain boundaries of deformed α‐fiber grains in the central layer of hot‐rolled sheets. The volume advantage of {114}<481> grains stem from the favorable growth environment caused by the low‐deformation stored energy, low orientation gradient, higher mobility of grain boundary, and size advantage to their surrounding deformation structure. In the final sheet, {100}<021> texture is the most vital texture, but {114}<481> grains exhibit a large volume fraction. As there are only 4–5 grains on average along the thickness direction of the final sheet, the texture gradient along the thickness direction no longer exists.

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“…The involved researches have shown that as for silicon steel, the <100> crystal direction is the one to be easily magnetized, whereas the <111> crystal direction is the one to be magnetized most difficultly. [ 5–7 ] Because the direction of magnetization for silicon steel lamination in motors is always perpendicular to the surface of silicon steel lamination, it is required to form more λ‐fiber textures in the direction which is perpendicular to the surface of the silicon steel lamination, whereas the content of γ‐fiber texture needs to be reduced to a minimum extent. After magnetization, the silicon steel lamination shall have high magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

“…After magnetization, the silicon steel lamination shall have high magnetic properties. [ 5–7 ] At present, the texture components of silicon steels can be regulated by controlling the process parameters of hot rolling, warm rolling, cold rolling, and subsequent heat treatment. The appropriate measures are taken to generate a strong {001} <100> cube texture as well as {110}<100 > Goss texture and reduce the content of the γ‐fiber texture, which contributes to enhancing the magnetic properties of silicon steels.…”

Section: Introductionmentioning

confidence: 99%

Grain Refinement Mechanism of High‐Silicon Steel Based on the Addition of Cr and Ni

Jiang

Sun

et al. 2022

steel research int.

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Fe–6.5Si–2Cr–xNi (x = 4, 8, 12) high‐silicon steels with novel chemical composition are fabricated by adding Cr and Ni elements to high‐silicon steels. The experimental results show that the microstructures of FeSiCrNi high‐silicon steels are gradually refined with the increase in Ni content. In particular, as for Fe–6.5Si–2Cr–12Ni sample, the grains are refined very considerably. Fe–6.5Si–2Cr–12Ni sample comprises a large number of A2 disordered phases, a small number of ordered B2 phases, and a certain number of α‐Fe phases. The addition of Ni element inhibits the nucleation of grain boundary ferrite, and thus it contributes to the formation of acicular ferrite with high density of dislocations and high‐angle grain boundaries. In addition, the high content of Ni elements leads to slow diffusion of the atoms as well as severe thermal hysteresis in the Fe–6.5Si–2Cr–12Ni sample. This plays an important role in refining the microstructures of Fe–6.5Si–2Cr–12Ni sample. In addition, the intensity of {001}<100> cube texture and {001}<110> rotation‐cube texture increases with the increase in Ni content, which makes the Fe–6.5Si–2Cr–12Ni sample have strong λ‐fiber texture, α‐fiber texture, and γ‐fiber texture.

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Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel

Cited by 31 publications

References 44 publications

Texture Development During Annealing in a Low-Carbon Formable Steel Containing Impurities from Increased Scrap Use

Texture Development During Annealing in a Low-Carbon Formable Steel Containing Impurities from Increased Scrap Use

Recrystallization Behavior of Hot‐Rolled Microstructure with Texture Gradient and Texture of Final Sheet in Thin‐Gauge Electrical Steel

Grain Refinement Mechanism of High‐Silicon Steel Based on the Addition of Cr and Ni

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