Effects of DC Current on the Mechanical Behavior of AlMg1SiCu

Decoupling Thermal and Electrical Effect in an Electrically Assisted Uniaxial Tensile Test Using Finite Element Analysis

“…Subsequent studies clarified that there exists an independent electrical-mechanical relation which alters the flow behavior even under isothermal condition. [20] For instance, Andrawes et al [8] reported that the electric current reduced the deformation energy in AlMgSiCu alloy without substantially increasing the work piece temperature. It is generally assumed that the plastic deformation occurs by thermally activated mechanism wherein the dislocations stopped at local barriers are released by thermal fluctuations.…”

“…Microstructural changes similar to annealing were observed when DC current was passed during the deformation of aluminum alloys. [8,16] One possible reason could be due to the non-homogenous temperature distribution in the lattice near dislocations. [12] The other possible explanation could be due to the localized heating at the grain boundaries under electric current; Fan et al [14] observed grain boundary melting and intergranular cavitation in brass alloys under electric current when the average temperature is much lower than that of melting.…”

“…Most of the studies on electroplasticity focus on applying intermittent DC pulses during plastic deformation. [8,9] Detailed experimental investigations on the effect of material, pre-strain, polarity, and other mechanical behavior like fatigue and creep on electroplasticity have been studied on different metals in the past; details of which are summarized in the excellent reviews. [9,10] The interest in electroplasticity has gained much interest of late [11][12][13][14][15][16] in the potential application of enhancing formability [7] and reducing spring-back [17] in sheet metal components.…”

Effect of current density and zinc content during electrical-assisted forming of copper alloys

“…For example, Andrawes et al [10] showed that the temperature increase during EAF tension of AlMg1SiCu only represented a small portion of the flow stress reductions observed. In the experiments presented in this paper, the maximum temperature observed for the Cu260 120 A/mm 2 case is approximately 208 8C, which is well below the hot working temperature of this material (e.g., 700-900 8C).…”

Experimental investigation on formability and microstructure of AZ31B alloy in electropulse-assisted incremental forming

“…In addition, one interesting phenomenon should be noticed that, when the RMS current density is less than 92.2 A/mm 2 , the forming angle increased slowly, however, it has a sharp increase when the density is more than 96 A/mm 2 . This indicates that, it seems to have a current density threshold for EP effect [32], and the promotion effect could be enhanced sharply after threshold current density value. Finally, the compared photos of the formed products without electropulse and with different current densities are shown in Fig.…”