The microstructure dependence of drawability in ferritic, pearlitic, and TWIP steels during wire drawing

Hwang, Joong‐Ki

doi:10.1007/s10853-019-03499-4

Cited by 31 publications

(6 citation statements)

References 64 publications

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“…Hwang [14] suggested that this result is highly related to the different strain hardening behavior between plain carbon steels and TWIP steel. Namely, the strain hardening exponents of TWIP steel are much higher than those of plain carbon steels [23]. Overall, it can be concluded from an engineering application point of view that the proposed FE analysis for the flat wire rolling process can be used to evaluate the characteristics of the shape and strain distribution with the process conditions.…”

Section: Validation Of the Numerical Modelmentioning

confidence: 89%

Effect of Cambered and Oval-Grooved Roll on the Strain Distribution During the Flat Rolling Process of a Wire

Hwang

2020

Processes

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The effect of the roll design on the strain distribution of the flat surface, lateral spreading, and the strain inhomogeneity of a flat-rolled wire were investigated during the flat rolling process. Oval-grooved and cambered rolls with various radii were applied to the flat rolling process based on a numerical simulation. The effective strain on the flat surface of the wire increased when using a cambered roll due to the highly intensified contact pressure on the flat surface, while the effective strain on the flat surface of the wire decreased when using an oval-grooved roll. Lateral spreading decreased when using an oval-grooved roll because the spread in the free surface area of the wire was highly restricted by the oval-grooved roll shape. In contrast, the spread in the surface area increased when using a cambered roll due to the less-restricted metal flow at the free surface. Accordingly, a cambered roll with a small radius is highly recommended in order to improve the surface quality of flat-rolled wires. This is beneficial for industrial plants because the cambered roll can be easily applied in flat rolling plants.

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Section: Validation Of the Numerical Modelmentioning

confidence: 89%

Effect of Cambered and Oval-Grooved Roll on the Strain Distribution During the Flat Rolling Process of a Wire

Hwang

2020

Processes

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“…An Instron testing machine was used to pull the specimens at a strain rate of 10 −3 s −1 with a mechanical extensometer at room temperature. To evaluate the ductility of the drawn wire, the RA value of wire was carefully measured after the tensile test [29]. Hardness was measured on the cross section of specimens perpendicular to the drawing axis with the test load varying from 0.5 to 1.0 kg over a constant holding period of 15 s…”

Section: Wire Drawingmentioning

confidence: 99%

Correlation of Strain Path, Texture, Twinning, and Mechanical Properties in Twinning-Induced Plasticity Steel during Wire Drawing

Hwang

2020

Materials

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The effect of changing the strain path on texture development, twin kinetics, and mechanical properties in twinning-induced plasticity steel was investigated to understand twinning behavior in more detail. Among the various plastic deformation processes, the wire drawing process was selected to achieve the aims of the study. Specimens of cold-drawn TWIP steel wire under the same effective strain but with different crystallographic textures were successfully fabricated using the effect of the wire drawing direction. Electron backscatter diffraction results showed that the drawn wires using both unidirectional (UD) and reverse-directional (RD) wire drawing processes were characterized as duplex fiber textures of major <111> and minor <100>. It was found that the RD wire had a higher fraction of <111> component at both the center and surface areas compared to the UD wire, because the metal flow of the RD wire was beneficial for the development of a <111> orientation. The pronounced <111> crystallographic orientation of the RD wire activated the twinning rate and geometrically necessary dislocation density, leading to an increase in strength but a decrease in ductility. The strain path is as important as the amount of strain for strengthening the materials, especially those that are deformed by twinning.

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“…The required K and n values were obtained by room temperature tensile test from the Ref. 17) The stress-strain relationship for high strength twinning-induced plasticity (TWIP) steel was σ = 1 980ε 0.54 MPa and low strength ferritic steel was σ = 571ε 0.136 MPa. The analyzed chemical compositions of the ferritic and TWIP steels in this study are Fe-0.1C-0.4Mn-0.1Si and Fe-0.6C-19.94Mn-1.03Al in weight percent, respectively.…”

Section: Finite Element Analysismentioning

confidence: 99%

The microstructure dependence of drawability in ferritic, pearlitic, and TWIP steels during wire drawing

Cited by 31 publications

References 64 publications

Effect of Cambered and Oval-Grooved Roll on the Strain Distribution During the Flat Rolling Process of a Wire

Effect of Cambered and Oval-Grooved Roll on the Strain Distribution During the Flat Rolling Process of a Wire

Correlation of Strain Path, Texture, Twinning, and Mechanical Properties in Twinning-Induced Plasticity Steel during Wire Drawing

Effects of Process Conditions, Material Properties, and Initial Shape of Flaw on the Deformation Behavior of Surface Flaw during Wire Drawing

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