Ferrite recrystallisation and characteristics of non-recrystallised ferrite grains in Ti added low carbon steels

Ogawa, Takeshi

doi:10.1179/1743284714y.0000000622

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…The interaction between recovery and recrystallization during annealing in iron and steel was extensively investigated [ 1 , 2 , 3 , 4 , 5 , 6 ]. For low-carbon steel, Osawa et al [ 1 ] reported that the formation of C–Mn dipoles leads to the retardation of recovery and changes in the recrystallization texture.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis

Sugiyama

Ogawa

et al. 2021

Materials

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We conducted quantitative analysis of the recovery process during pure iron annealing using the modified Williamson-Hall and Warren-Averbach methods. We prepared four types of specimens with different dislocation substructures. By increasing the annealing temperature, we confirmed a decrease in dislocation density. In particular, screw-dislocation density substantially decreased in the early stage of the recovery process, while edge-dislocation density gradually decreased as annealing temperature increased. Moreover, changes in hardness during the recovery process mainly depended on edge-dislocation density. Increases in annealing temperature weakly affected the dislocation arrangement parameter and crystallite size. Recovery-process modeling demonstrated that the decrease in screw-dislocation density during the recovery process was mainly dominated by glide and/or cross-slip with dislocation core diffusion. In contrast, the decrease in edge-dislocation density during the recovery process was governed by a climbing motion with both dislocation core diffusion and lattice self-diffusion. From the above results, we succeeded in quantitatively distinguishing between edge- and screw-dislocation density during the recovery process, which are difficult to distinguish using transmission electron microscope and electron backscatter diffraction.

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Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis

Sugiyama

Ogawa

et al. 2021

Materials

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“…Controlling metallurgical phenomena in manufacturing processes, including recrystallization, phase transformation, and precipitation, is vital to obtain excellent materials properties. We focused on controlling ferrite recrystallization in low-carbon steels during annealing [ 2 , 3 , 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Analysis of Ferrite Grains Recrystallized in Low-Carbon Steel during Annealing

et al. 2021

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We performed a three-dimensional (3D) analysis of ferrite grains recrystallized in low-carbon steel during annealing. Cold-rolled specimens were heated to 723 K and held for various periods. The 3D morphology of ferrite grains recrystallized during the annealing process was investigated. The progress of recovery in low-carbon steel was more inhibited than that in pure iron. However, ferrite recrystallization in low-carbon steel was more rapid than that in pure iron. The Avrami exponent was inconsistent with the 3D morphology of the recrystallized ferrite grains in pure iron but consistent with that of the grains in low-carbon steel. Thus, the Avrami exponent depends on the recovery and recrystallization behaviors. Furthermore, the recrystallized ferrite grain growth was virtually 2D. Three types of recrystallized ferrite grains were observed: recrystallized ferrite grains elongated along the transverse or rolling direction; plate-shaped recrystallized ferrite grains grown in the transverse and rolling directions; fine and equiaxed recrystallized ferrite grains. These results suggest that the recrystallized ferrite grains did not grow in the normal direction. Thus, we concluded that the 3D morphology of recrystallized ferrite grains depends on the kinetics of recrystallization and the initial microstructure before recrystallization.

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Simulation-aided analysis of ferrite recrystallization behavior of pure iron with different dislocation characters

Iguchi

Ogawa

Sun

et al. 2023

Journal of Materials Research and Technology

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Ferrite recrystallisation and characteristics of non-recrystallised ferrite grains in Ti added low carbon steels

Cited by 5 publications

References 23 publications

Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis

Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis

Three-Dimensional Analysis of Ferrite Grains Recrystallized in Low-Carbon Steel during Annealing

Simulation-aided analysis of ferrite recrystallization behavior of pure iron with different dislocation characters

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