Abstract
Hot torsion test was employed to continuously deform an ultra-low carbon Ti-added interstitial free (IF) steel within a ferrite single-phase region (< 850°C) at different strain rates. Specimens were twisted to high equivalent strains up to 7.2 and immediately water-quenched to prevent post-deformation recrystallization. Microstructure observations were carried out near the surface of the torsion specimens using electron backscattered diffraction (EBSD) measurements. The results showed that the initial grains were elongated and subdivided, so that the distance between high angle boundaries (HABs) decreased with decreasing the temperature or with increasing the strain rate. It was believed that grain subdivision mechanism accompanied with dynamic recovery as well as limited boundary migration were responsible to the evolution of the microstructures. Furthermore, micro-texture measurements showed a strong development of <111> orientation parallel to the shear direction, among which, {112}<111> : {shear plane normal}<shear direction>, had a high fraction particularly within the low misorientation regions (LMRs).
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Gholizadeh, R., Shibata, A., Tsuji, N. (2016). Grain Refinement and Texture Evolution in Highly Deformed Ferrite During High-Temperature Torsion Deformation of IF Steel. In: Holm, E.A., et al. Proceedings of the 6th International Conference on Recrystallization and Grain Growth (ReX&GG 2016). Springer, Cham. https://doi.org/10.1007/978-3-319-48770-0_11
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DOI: https://doi.org/10.1007/978-3-319-48770-0_11
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48626-0
Online ISBN: 978-3-319-48770-0
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