The effect of a non-circular drawing sequence on delamination characteristics of pearlitic steel wire

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In this study, a non-circular drawing (NCD) sequence was applied to investigate the effect of deformation behavior, microstructure and texture evolution on delamination characteristics of pearlitic steel wire under torsional deformation mode. The multi-pass NCD sequence was numerically and experimentally applied up to the 12th pass in comparison with conventional wire drawing (WD). For investigation of the deformation characteristics of the drawn wires, three-dimensional finite element and flownet analyses were carried out. These simulation results indicated that the NCD could impose relatively homogeneous plastic deformation on the wire compared to the WD. From the scanning electron microscopy and X-ray diffraction results, globular cementite and cylindrical texture component, which might increase likeliness of delamination fracture, were rarely observed in the NCD drawn wire. In the torsion test, the delamination fracture was observed in the WD drawn wire for the 10th pass while it did not occur for the 12th pass NCD. In addition, the ultimate tensile strength (UTS) of 2300 MPa grade wire was manufactured by the NCD and the UTS value was 257 MPa higher than the one of the WD. Therefore, it was demonstrated that the multi-pass NCD could impose relatively homogeneous plastic deformation on the wire, resulting in high-torsional ductility with better strength compared to the WD.
Publisher
ELSEVIER SCI LTD
Issue Date
2014-10
Language
English
Article Type
Article
Keywords

LOW-CARBON STEEL; MICROSTRUCTURE EVOLUTION; MECHANICAL-PROPERTIES; DEFORMATION; TEXTURE

Citation

MATERIALS & DESIGN, v.62, pp.137 - 148

ISSN
0261-3069
DOI
10.1016/j.matdes.2014.05.014
URI
http://hdl.handle.net/10203/190504
Appears in Collection
ME-Journal Papers(저널논문)
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