The application of the electro-plastic technique in the cold-drawing of steel wires

Numerical Modeling and Experimental Verification for High-Speed Forming of Al5052 with Single Current Pulse

“…In the tensile test in which current is applied, the amount of temperature change ∆ that occurs in the specimen during the application of current can be expressed as Equation (1). (1) In this case, Q is the heat value, c is the specific heat, m is the mass, and Q can be expressed by the following Equation (2).…”

“…The electrically assisted forming, which combines the electro-plastic effect with a general forming process, has attracted attention as a process for improving the formability by decreasing the forming load by using the momentarily reduced flow stress. In fact, extensive research has been conducted on the electro-plastic effect in wire drawing [1][2][3], compression [4], rolling [5,6], bending [7,8], blanking [9], etc. Andrawes et al [10] reported that electric current reduced the deformation energy of various metals such as aluminum and copper-based alloys, without substantially increasing the work piece temperature.…”

Recent advances and challenges in electroplastic manufacturing processing of metals

“…51,52 Russian researchers have already implemented this process in drawing [53][54][55][56][57][58][59][60] and rolling, [61][62][63][64][65] and some of the benefits of metal working are given in Table I. Recently, Tang et al conducted a series of studies on EP drawing [66][67][68][69] and rolling. [70][71][72] The results confirm the EP effect in metals and point out that EPMP is especially suitable for the manufacturing of metals and their alloys that are otherwise difficult to process using conventional manufacturing processing.…”

“…Recently, Tang and coworkers studied the use of EPE in the cold drawing of different metals. [66][67][68][69] Current pulsing during drawing can reduce the deforming resistance of stainless steel 304L. 67 Compared with traditional drawing technology, EPD can reduce the resistivity of the cold-drawn steel wires by more than 10% as shown in Fig.…”

Research of microstructure of spherical graphite iron by electropulsing annealing

“…The microstructure improvement of solid-state metals has been achieved by the high density pulse electric current with apparent electromigration (Hummel, 1994) and electroplastic effects (Molotskii, 2000) mainly in the field of recrystallization (Zhou et al, 2004), superplastic deformation (Liu et al, 2003) and metal-working (Tang et al, 1998(Tang et al, , 2003. Now there is not report about applications of the electropulsing annealing to the solid-state graphitization of the spherical graphite iron.…”