Flow softening rules and mechanisms in Ti–6Al–4V alloy sheet during electrically assisted near-isothermal tension

Li, Ping; Liu, Le; Hu, Lei; Zhang, Yue; Sun, Yan; Xue, Kemin

doi:10.1007/s10853-023-08140-z

Cited by 4 publications

(1 citation statement)

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“…Electroplasticity was studied for different loading schemes, e.g., during bending [50], compression [51], tension [52][53][54][55], and nanoindentation [56]. If the deformation increment decreases with the pulse number at constant stress then this is in favor of the fact that electroplasticity is not only due to the Joule heating but also due to the dislocation de-pinning.…”

Section: Introductionmentioning

confidence: 99%

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Dmitriev,

Morkina,

Tarov

et al. 2024

Spec. Mech. Eng. Oper. Res.

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High-density electric current pulses increase the plasticity and reduce the yield stress of metals with negligible heat generation. This effect has great potential for the development of energy-saving technologies for processing hard-to-deform metallic materials. Despite the long history of the study of electroplasticity, there is still no consensus on the physical nature of this effect. In this paper, the effect of repetitive pulses applied at the same or gradually increasing tensile stress on the plastic deformation of copper wire is investigated using a home-made experimental setup. The electroplasticity of the wire in the delivery state and after annealing is compared. It is shown that for a constant tensile stress, the incremental plastic deformation of the wire decreases with each successive pulse. This effect is stronger for annealed wires because they have a lower dislocation density and therefore a lower plasticity resource. The Joule heat release in the specimen and the heating due to plastic deformation are evaluated. The results obtained will be used to fit the parameters of the atomistic model being developed to describe the interaction of electron flow with dislocations.

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