Effect of pulsed electric current on electrically assisted indentation for surface texturing

Erdene-Ochir, Oyunchimeg; Liu, Jing; Chun, Doo‐Man

doi:10.1007/s00170-020-06102-2

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…This indicates that the texture of the plate surface, i.e., the linear surface and cross surface, may slightly hinder the mobility of ions in the electrolyte solution compared to the plain surface, which is free of obstacles and thus reflected in the results obtained. This is due to the fact that the flow of ions carrying electrons undergoes interactions when passing over a surface that has a specific texture; the flow is thus not like that of a plain surface [23]. In addition, the texturing effect on the cross surface increases the surface roughness due to its more complex shape compared to the linear surface, which in turn can reduce the output current achieved on the cross surface [24].…”

Section: Effect Of Varying Koh Concentrations On Output Current For D...mentioning

confidence: 99%

Effect of KOH Concentration on the Performance of HHO Generator at Varying Plate Surface Textures

Asmawi Marullah Ridhwan,

Muhd Ridzuan Mansor,

Noreffendy Tamaldin

et al. 2023

ARFMTS

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In an effort to improve the performance of the HHO generator, the surface texture of the electrode plate has been introduced through this study. Optimization of the HHO generator’s performance has been developed continuously in many parts of the world. Therefore, the effect of KOH concentration on the performance of the HHO generator at different plate surface textures was investigated in this study. The HHO generator used in this study combines wet and dry cells. Generally, the results showed an increase in output current, HHO production rate, and output temperature, and conversely, a decrease in operating time due to the effect of increasing KOH concentration and different surface textures. The output current exhibits a significant increase of over 200% for all types of plate surfaces. For the output temperature, the smallest increase of about 9.7% is achieved by the linear plate surface. Meanwhile, the best HHO gas production rate is 267.26 L/min with an operating time of only 112.25 s, which occurred on the surface of the linear plate. Briefly, increasing the KOH concentration followed by modification of the plate surface has yielded better results compared to the plain surface. As for the surface texture, it causes a change in the plate surface area, which has a positive impact on the performance of the HHO generator.

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Section: Effect Of Varying Koh Concentrations On Output Current For D...mentioning

confidence: 99%

Effect of KOH Concentration on the Performance of HHO Generator at Varying Plate Surface Textures

Asmawi Marullah Ridhwan,

Muhd Ridzuan Mansor,

Noreffendy Tamaldin

et al. 2023

ARFMTS

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“…Study on the effect of the electric current application on the hardness of steels and titanium alloys through the EA indentation process. [24] The EA indentation process…”

Section: Key Elementsmentioning

confidence: 99%

One Step Forward to Electrically Assisted Forming Mechanisms and Computer Simulation: A Review

Izadpanah

Cao

2022

Adv Eng Mater

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The electrically assisted forming (EAF) is a hybrid manufacturing process that utilizes electric current energy to improve the productivity and efficiency of the forming process. Many studies have been accomplished to investigate the effect of process parameters on its forming abilities, including pulse current effect, grain size, and current duration. There is currently a lack of agreement on the underlying mechanisms of the electroplastic effect to the formability of metallic materials through EAF, specifically on the Joule heating and electric wind's contributions. One promising solution to this dilemma is the application of computer simulation techniques for a better understanding of the physics of EAF. Therefore, this paper provides a brief review of the previous research studying the modeling of EAF and offers new solutions aiming to further the understanding of the underlying physics of this process through computer simulation approaches.

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“…In order to indirectly simulate the electric current effects in the scratching process, the electroplastic effect and Joule heating effect induced by the electric current flowing through the crystal copper workpiece need to be considered. In the EAS simulation, the initial temperature of the workpiece is set to 373 K [35][36][37] for Joule heating effect. And the equivalent electron wind force F wind quantified by the Huntington-Grone [38] ballistic model is additionally applied to each copper atom for electroplastic effect, following as [39]:…”

Section: Simulation Parametersmentioning

confidence: 99%

Molecular dynamics study on the effect of electric current on electrically-assisted scratching for crystal copper

Yu¹,

Zheng²,

Zhou³

et al. 2022

Phys. Scr.

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Investigation of the effect of electric current on the plastic deformation mechanism of metals during the electrically-assisted machining process is significant in further improving surface properties. In this paper, the molecular dynamics (MD) method is adopted to simulate the electrically-assisted scratching process of crystal copper, obtaining and analyzing the surface morphology, potential energy change, von Mises stress distribution, and crystal defect structure evolution. The MD simulation results show that the electric current effectively expands the dislocation slip range, resulting in a larger plastic deformation zone. Meanwhile, the combined action of the electron wind forces and Joule heating causes more dislocations to proliferate and increases the dislocation density limit, enhancing the plastic deformation ability of the single-crystal copper. Furthermore, the electric current strengthens the dislocation-grain boundary interactions and reduces the hindering effect of the grain boundaries on dislocations, promoting more dislocations to cross the grain boundaries. This work will be helpful for guiding the optimization of surface strengthening techniques to get better surface properties of metals.

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Effect of pulsed electric current on electrically assisted indentation for surface texturing

Cited by 7 publications

References 21 publications

Effect of KOH Concentration on the Performance of HHO Generator at Varying Plate Surface Textures

Effect of KOH Concentration on the Performance of HHO Generator at Varying Plate Surface Textures

One Step Forward to Electrically Assisted Forming Mechanisms and Computer Simulation: A Review

Molecular dynamics study on the effect of electric current on electrically-assisted scratching for crystal copper

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