Numerical study on the evolution of surface defects in wire drawing

Baek, Hyun Moo; Jin, Young Ho; Hwang, Sun Kwang; Im, Yong‐Taek; Son, Il‐Heon; Lee, Duk-Lak

doi:10.1016/j.jmatprotec.2011.10.028

Cited by 25 publications

(7 citation statements)

References 12 publications

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“…In the multi-pass wire drawing process, the crack width decreased because of the circumferential compression in the drawing die. In addition, the crack size increased in the axial direction, and the crack depth gradually deceased [21,22]. This means that if the crack size and depth of the initial wire are less than the critical value, the crack can be eliminated.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of 50.0 μm Ultra-Fine Pure Rhodium Wire, Using a Multi-Pass Wire Drawing Process, for Probe Card Pins

Lee

et al. 2019

Materials

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Rhodium is a rare material that is widely used in electrical and electronic components due to its excellent mechanical and electrical properties. Ultra-fine rhodium wires in particular are widely used in electronic components. In this study, a multi-pass wire drawing process was designed to fabricate ultra-fine pure rhodium wire with a diameter of 50.0 µm from an initial diameter of 80.0 µm, which is used as probe card pins. An elastic–plastic finite element (FE) analysis was performed to validate the pass schedule that was designed for this study. A fine wire drawing experiment was also carried out to verify the effectiveness of the designed process. As a result, the ultra-fine rhodium wire was fabricated using the design process without wire breaks and the diameter of the final drawn wire was 47.80 µm.

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Section: Resultsmentioning

confidence: 99%

Fabrication of 50.0 μm Ultra-Fine Pure Rhodium Wire, Using a Multi-Pass Wire Drawing Process, for Probe Card Pins

Lee

et al. 2019

Materials

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“…The directions of the surface flaws on the OT wire were classified into longitudinal, transverse, and oblique directions concerning the axial direction of the wire, as shown in Fig. 8 11 . The influence of the surface flaw direction on the spring strength was evaluated via FE analysis.…”

Section: Standardization Of Surface Flaws In the Ot Wirementioning

confidence: 99%

Influence of the surface flaws in oil-tempered wires on the fatigue life of automotive engine valve springs

Ahn²,

Lee

2022

Sci Rep

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The purpose of this study is to evaluate the fatigue life of an automotive engine valve spring when the micro defect is applied to a 2300 MPa-class oil-tempered wire (OT wire) with 2.5 mm of diameter as the critical flaw depth. First, the deformation of the surface flaws in the OT wire during the valve spring manufacturing processes was derived via FE analysis using the sub-modeling technique, and the residual stress of the final spring was measured and applied to the spring stress analysis model. Second, the strength of the valve spring was analyzed to examine the presence of residual stress and compare the applied stress levels by the surface flaw. Third, the influence of micro defects on the fatigue life of the spring was evaluated by applying the stress on the surface flaw derived through the spring strength analysis to the S–N curve derived through a rotary bending fatigue test with the OT wire. The flaw depth of 40 µm, which is the existing criterion for surface flaw management, does not reduce the fatigue life.

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“…and material properties. The formation of defects during the drawing process has been studied for both surface (Baek, 2012; Phelan, 2001a) as well as internal defects (Camacho, 2006; Phelan, 2001b). Internal defects produced in the drawing process are difficult to observe and can cause fracture during the process (Orbegozo, 1968), so numerical modelling incorporating damage models has proven to be a powerful tool for predicting fracture in wire drawing (Cao, 2015; Ko and Kim, 2000; McAllen and Phelan, 2007; González et al., 2018; among others).…”

Section: Introductionmentioning

confidence: 99%

Bilinear damage evolution in AA2011 wire drawing processes

Ortega

Cruchaga

Celentano

2022

International Journal of Damage Mechanics

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This paper presents an experimental and numerical analysis of damage evolution in AA2011 aluminum alloy wires drawn under different scenarios. To this end, load-unload tensile tests were firstly carried out in order to characterize the degradation of the mechanical response in every cycle where the experimental results show a bilinear damage relationship in terms of the effective plastic strain. Therefore, a modification of the classical Lemaitre model is proposed in this work in order to reproduce bilinear paths of damage with the addition of only two parameters that can be directly obtained from the material characterization. Then, the damage predictive capability of this new experimental-based model is assessed in numerical simulations of the drawing process in one and two passes (considering for this last case the sequential and tandem configurations) where the computed predictions are compared with the corresponding experimental data showing a good agreement between them.

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Numerical study on the evolution of surface defects in wire drawing

Cited by 25 publications

References 12 publications

Fabrication of 50.0 μm Ultra-Fine Pure Rhodium Wire, Using a Multi-Pass Wire Drawing Process, for Probe Card Pins

Fabrication of 50.0 μm Ultra-Fine Pure Rhodium Wire, Using a Multi-Pass Wire Drawing Process, for Probe Card Pins

Influence of the surface flaws in oil-tempered wires on the fatigue life of automotive engine valve springs

Bilinear damage evolution in AA2011 wire drawing processes

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