Influence of torsion deformation on microstructure of cold-drawn pearlitic steel wire

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 event...

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Bibliographic Details
Published in:Journal of materials science 2008-02, Vol.43 (4), p.1241-1248
Main Authors: Cordier-Robert, Catherine, Forfert, Benoît, Bolle, Bernard, Fundenberger, Jean-Jacques, Tidu, Albert
Format: Article
Language:English
Subjects:
Carbon
Carbon content
Cementite
Characterization and Evaluation of Materials
Chemical Sciences
Chemistry and Materials Science
Classical Mechanics
Cold drawing
Condensed Matter
Cristallography
Cross-disciplinary physics: materials science
rheology
Crystallography and Scattering Methods
Deformation
Deformation effects
Dislocation mobility
Dislocation pinning
Engineering Sciences
Exact sciences and technology
Ferrite
Ferrites
Materials Science
Mechanics
Mechanics of materials
Microstructure
Migration
Mossbauer spectroscopy
Other topics in materials science
Physics
Polymer Sciences
Solid Mechanics
Steel wire
Steels
Thermomechanical treatment
Torsion
Wire
Wire drawing
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Summary: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.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-007-2272-8