Abstract
A comparative microstructural analyse of cold-drawn pearlitic steel wires in as-drawn and after an additional torsion deformation states is presented in this paper. During torsion the temperature of the wire increases to attain 90 °C. Then the microstructure of wires is the result of different events effects, as initial drawing, temperature increase and torsion deformation. Individually or in association, both events influence the stress level and nature in ferrite and cementite lamellae, modify the kinetic of cementite decomposition and change the dislocation mobility in cementite and ferrite. Carbon atoms migration from cementite to ferrite is affected by these thermomechanical treatments inducing a modification of dislocation pinning by carbon atoms and lamellae interfaces. The phases’ determination and quantification, associated with the carbon content variation in each phase was investigated by Mössbauer spectroscopy. The evolution of the pearlitic steel wires microstructure will be discussed point-by-point, as a function of applied deformation nature.
Notes
Fe-Fe3C phase diagram.
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The authors acknowledge one of the referees for valuable comments.
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Cordier-Robert, C., Forfert, B., Bolle, B. et al. Influence of torsion deformation on microstructure of cold-drawn pearlitic steel wire. J Mater Sci 43, 1241–1248 (2008). https://doi.org/10.1007/s10853-007-2272-8
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DOI: https://doi.org/10.1007/s10853-007-2272-8