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

Baek, Hyun Moo; Hwang, Sun Kwang; Joo, Ho Seon; Im, Yong‐Taek; Son, Il‐Heon; Bae, Chul Min

doi:10.1016/j.matdes.2014.05.014

Cited by 29 publications

(11 citation statements)

References 25 publications

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“…Fine (300 μm) meshes were applied on the surface area to inspect the complex deformation behavior. The friction factor of 0.1 was selected for numerical simulation according to the previous investigations [41][42][43]. Other parameters, e.g., drawing speed, die angle and reduction per pass, for numerical simulation were kept the same as the actual experimental conditions shown in Table 2.…”

Section: Analysis Of Stress Statementioning

confidence: 99%

Microstructural evolution and deformation behavior of twinning-induced plasticity (TWIP) steel during wire drawing

Hwang

Son

et al. 2015

Materials Science and Engineering: A

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Section: Analysis Of Stress Statementioning

confidence: 99%

Microstructural evolution and deformation behavior of twinning-induced plasticity (TWIP) steel during wire drawing

Hwang

Son

et al. 2015

Materials Science and Engineering: A

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“…Table 2 shows the optimal results obtained from the RBF while Fig. 4 shows comparative standard deviation (STD) of effective strains at the cross-section of the drawn wire after the 11th pass for the RBF, the 12th pass for the conventional WD, and the best NCD obtained from the previous work [4]. The results indicate That within the smaller number of passes and the same total reduction of area, the optimum solutions obtained from the RBF in this study give better deformation homogeneity than the conventional WD and the best NCD obtained from the previous work [4].…”

Section: Resultsmentioning

confidence: 99%

“…In this study, finite element analysis (FEA) for the NCD sequence was carried out using CAMPform3D, developed by Kim and Im [10]. Three-dimensional FEA model of one quarters of the work piece with increasing density of the mesh system along the drawing direction similar to the previous work [4] was used in this study. Since each simulation for the NCD sequences is time-consuming, a surrogate model was introduced for the optimisation process by approximating the effective strains for twentyone points, as shown in Fig.…”

Section: Min: ( ) ( ) ( )mentioning

confidence: 99%

“…In this regard, a non-circular drawing (NCD) sequence was proposed by Hwang et al [2] and applied to low carbon steel up to 10 passes of the NCD sequence by Lee et al [3]. Then, Baek et al [4] introduced two processing routes for the NCD sequence and applied up to 12th pass for pearlitic steel wire. All of these work showed better strength and ductility compared to one of the conventional WD by imposing relatively high and homogeneous deformation on the wire during the process.…”

Section: Introductionmentioning

confidence: 99%

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Surrogate Assisted Teaching Learning Based Optimisation for Process Design of a Non-circular Drawing Sequence

Pholdee

Bureerat

Baek³

et al. 2015

Proceedings of the 5th International Symposium on Knowledge Acquisition and Modeling

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In this study, surrogate assisted teaching learning based optimisation was conducted for designing a non-circular drawing (NCD) sequence in order to improve the deformation homogeneity of the drawn wire. The objective function was introduced to minimise inhomogeneous distribution of effective strain atthe cross-section of the drawn wire by selecting the design variables such as major to minor axes ratio, semi-die angle, and reduction ofarea. Three surrogate models were used to predict the effective strains atthe crosssection of the drawn wire while the teaching learning based optimiser was used to obtain the optimum results. Finite element analysis was employed for simulation of the NCD sequence in order to determine accurate effective strain distribution. The accuracy of all surrogate models was investigated while optimum results were compared with the previous studies available in the literature. The optimum results found in the present study showed better effective strain homogeneity at the cross-section of the drawn wire with the same total reduction of the area available in the literature for the less number of passes.

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“…where τ and k are the shear stress on the contact surface and the shear yield stress of the material, respectively. The shear friction factor (m) in the wire-die interface was chosen to be 0.1 [30,31], and other process conditions and physical properties were kept similar to the real experiments. The ambient and initial wire temperatures were approximately 21 • C. The temperature rise (∆T) during wire drawing was numerically calculated using the following equation [32,33]:…”

Section: Numerical Proceduresmentioning

confidence: 99%

Impact of Die Radius in a Streamlined Die during Wire Drawing

Hwang

2021

Applied Sciences

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The effects of die radius in a streamlined die on design factors, such as the distribution of strain, stress, temperature, damage, and drawing force of a wire, were investigated during wire drawing for a better understanding of streamlined die and improvement in drawing quality of the wire. A numerical simulation was performed with the die radius of the streamlined die. The behavior of the design factors of the drawn wire fabricated by the streamlined die was different from that of the conventional die and was highly dependent on the die radius. The different behaviors of the design factors with the die radius can be explained by the frictional work and redundant work of the wire with die angle. The temperature rise and drawing force were high at a greater die radius because of the great frictional stress and heating effect stemming from the high contact length of the wire and die. Meanwhile, the higher redundant work at the surface area with decreasing die radius led to higher strain inhomogeneity, effective stress, damage value, temperature rise, and drawing force due to the abrupt change in the metal flow of the wire stemming from the high die angle. After the optimization of several design factors with die radius, it was concluded that the optimum IDR values ranged from 0.14 to 0.18, indicating that a streamlined die with a radius of 70 to 90 mm was the most suitable in the present process condition. In particular, the damage value of the wire was reduced in this range of die radii compared to the conventional die.

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

Cited by 29 publications

References 25 publications

Microstructural evolution and deformation behavior of twinning-induced plasticity (TWIP) steel during wire drawing

Microstructural evolution and deformation behavior of twinning-induced plasticity (TWIP) steel during wire drawing

Surrogate Assisted Teaching Learning Based Optimisation for Process Design of a Non-circular Drawing Sequence

Impact of Die Radius in a Streamlined Die during Wire Drawing

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