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Metals 2016, 6(11), 288; doi:10.3390/met6110288

The Effect of Ultrafast Heating in Cold-Rolled Low Carbon Steel: Recrystallization and Texture Evolution

Department of Materials Science and Engineering, Ghent University, Technologiepark 903, 9052 Gent, Belgium
Department of Metallurgical Engineering, Universidad de Santiago de Chile, Av. Lib. Bdo. O´Higgins 3363, Estación Central, 9170022 Santiago de Chile, Chile
Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628CD Delft, The Netherlands
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 4 October 2016 / Revised: 8 November 2016 / Accepted: 17 November 2016 / Published: 21 November 2016
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The microstructure and texture evolution of cold-rolled low carbon steel after ultrafast heating and quenching is investigated. Experiments were carried out at heating rates of 150 °C/s and 1500 °C/s. The recrystallization of ferrite is studied by scanning electron microscopy and electron backscattered diffraction techniques. The texture evolution of cold rolled steel during ultrafast heating was studied, making it possible to estimate the precise effect of heating rate on the orientations of newly formed grains. The experimental results showed that the recrystallization of ferrite was not completed before the full transformation of austenite. The noticeable increase in the fraction of recrystallized grains of diameter less than 1 µm, when the heating rate is increased from 150 °C/s to 1500 °C/s suggests that the increase of the heating rate enhances the nucleation of ferrite. The crystallographic orientations in recrystallized ferrite are strongly influenced by the heating rates. The effect of heating rate in the releasing of stored energy, carbon diffusion and spheroidization of cementite might explain some differences in textures observed in recrystallized ferrite. View Full-Text
Keywords: ultrafast heating; microstructure; texture; recrystallization; low-carbon steel ultrafast heating; microstructure; texture; recrystallization; low-carbon steel

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Castro Cerda, F.M.; Kestens, L.A.I.; Monsalve, A.; Petrov, R.H. The Effect of Ultrafast Heating in Cold-Rolled Low Carbon Steel: Recrystallization and Texture Evolution. Metals 2016, 6, 288.

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