Electroplastic wire drawing: A promising method of production of lightweight wire and cable

Troitskiy, O A; Stashenko, V. I.

doi:10.3103/s1052618815080087

Cited by 11 publications

(3 citation statements)

References 3 publications

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“…Similarly, Troistskiy et at. [13] showed that, as compared to the CD process, wire plasticity was enhanced, and necessary drawing forces decreased by 30-35% and electrical resistance decreased by 18-20% during EPT of copper. Recently, Egea et al [14] analyzed the effect of EPT on drawing forces, mechanical behavior, and the microstructure of the material.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Fast Annealing Treatment by Electropulsing during Pure Copper Wire Drawing

Rojas

Egea

Hameed

et al. 2019

Metals

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The influence of electropulses in situ on the drawing process of copper wires was investigated, with the aim of avoiding time consuming annealing thermal treatments. It was found that with the application of electropulses, tensile and drawing forces were reduced and the plasticity of the wire was improved. Meanwhile, compared with conventional drawing, hardness decreased. With the electropulsing treatment, no differences were found in the material’s resistivity. The microstructure exhibited similar grain size despite the joule effect, although some changes were found in the low and high angle grain boundaries. Compressive residual stresses were found on the surface during the assisted process; consequently, these specimens were expected to have a better performance under fatigue fracture. Therefore, we have found the first evidence of the advantages of this hybrid technique for pure copper wire drawing and, ultimately, to replace the conventional drawing annealing process with a more time effective electropulse-assisted drawing process.

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Section: Introductionmentioning

confidence: 99%

An Ultra-Fast Annealing Treatment by Electropulsing during Pure Copper Wire Drawing

Rojas

Egea

Hameed

et al. 2019

Metals

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“…With the continuous progress in polymer science and manufacturing technology, man-made chemical fiber filaments such as polymer fibers [1,2], optical fibers [3,4], and wires and cables [5] have begun to play an increasingly important role in civil fabrics, communications, military industry, aerospace and other fields. In the spinning process, the appearance diameter uniformity of man-made chemical fiber filaments not only determines the quality classification and price of the filaments, but also when the appearance diameter uniformity is poor, the filaments strength will decrease and the breakage rate * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Non-contact online inspection method for the appearance diameter uniformity of chemical fiber filaments

Liu,

Gan,

Liao

et al. 2023

Meas. Sci. Technol.

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As chemical fiber filaments diameter variation directly affects spinning quality, spinning condition monitoring becomes more and more important in an intelligent manufacturing environment. Firstly, based on the single-slit Fraunhofer diffraction model and the Babinet principle, the non-contact filaments diffraction model is developed to generate diffraction fringe patterns by irradiating chemical fiber filaments with He-Ne laser. Secondly, for the characteristics of diffraction fringe patterns, a segmentation mask window-based diffraction fringe center of gravity extraction method is proposed, and a zero-phase Butterworth low-pass filter is designed and applied to the diffraction light intensity curves to accurately extract the extreme points positions of the adjacent dark fringe and calculate the diameter information. Finally, the non-contact chemical fiber filaments appearance diameter online inspection experiment platform is built to carry out static and dynamic experiments of filaments. The experimental results show that the maximum absolute value of absolute error is less than 1.1 μm for static measurement and less than 10 μm for dynamic measurement.

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“…In the subsequent years, two main groups started to investigate the effect of electrical current on the deformation of various metallic and non-metallic materials. Pioneering researches were conducted in the USA by Conrad and his team [2,3,4,5,6,7] and in the Soviet Union by Troitskii and his people [8,9,10,11,12,13], who concluded that the enhancement of the formability and the reduction of the forming forces cannot be ascribed solely to the joule heating but also to an a-thermal effect, which they called the Electroplastic Effect (EPE). The discovery of such effect has led to a new way of forming metallic materials called Electrically Assisted Manufacturing (EAM), which is applied to a variety of processes such as rolling [14,15], drawing [8,16], cutting [16,17,18], forging [19,20], sintering [21,22], and bending [23,24], among others.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electroplastic Effect on Four Grades of Duplex Stainless Steels

et al. 2019

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Since the late 1950s, an effect of electrical current in addition to joule heating on the deformation of metals called the Electroplastic Effect (EPE) has been known. It is used nowadays in the so-called Electrically Assisted Forming (EAF) processes, but the understanding of the phenomenon is not very clear yet. It has been found that EPE increases the formability of high stacking fault energy (SFE) materials, while low SFE materials reach fracture prematurely. Since Duplex Stainless Steels (DSSs) possess a microstructure consisting of two phases with very different SFE (low SFE austenite and high SFE ferrite) and they are widely used in industry, we investigated EPE on those alloys. Tensile tests at 5 A/mm2, 10 A/mm2 and 15 A/mm2 current densities along with thermal counterparts were conducted on UNS S32101, UNS S32205, UNS S32304 and UNS S32750. The DSS grades were characterized by means of optical microscopy, X-ray diffraction and their mechanical properties (ultimate tensile strength, total elongation, uniform elongation and yield stress). An increase in uniform elongation for the electrical tests compared to the thermal counterparts as well as an increase in total elongation was found. No differences were observed on the yield stress and on the ultimate tensile strength. Un uneven distribution of the current because of the different resistivity and work hardening of the two phases has been hypothesized as the explanation for the positive effect of EPE.

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Electroplastic wire drawing: A promising method of production of lightweight wire and cable

Cited by 11 publications

References 3 publications

An Ultra-Fast Annealing Treatment by Electropulsing during Pure Copper Wire Drawing

An Ultra-Fast Annealing Treatment by Electropulsing during Pure Copper Wire Drawing

Non-contact online inspection method for the appearance diameter uniformity of chemical fiber filaments

Investigation of Electroplastic Effect on Four Grades of Duplex Stainless Steels

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