Optimization and mechanism of precise finishing of TC4 alloy by plasma electrolytic polishing

Zou, Yongchun; Wang, Shuqi; Chen, Guoliang; Wang, Yaming; Zhang, Kaiwei; Zhang, C.S.; Wei, Daqing; Ouyang, Jia‐Hu; Jia, Dechang; Zhou, Yu

doi:10.1016/j.surfcoat.2023.129696

Cited by 9 publications

(2 citation statements)

References 37 publications

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“…Within minutes, it achieves a significant reduction in surface roughness, transforming it from 4 μm to less than 0.1 μm (titanium alloy), greatly improving the quality of the metal surface [4]. Notably, this technique imposes no restrictions on the intricate geometries of parts used in industries such as aviation and medical equipment, ensuring consistent polishing results across both exterior and interior surfaces.…”

Section: Introductionmentioning

confidence: 99%

Material removal model for describing the plasma discharge effect in magnetic-electrolytic plasma polishing

Xiang,

Sun,

Yang

et al. 2024

Int J Adv Manuf Technol

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Considering that the regulating physical mechanism of the magnetic field on electrolytic plasma is insufficient, this study introduces a plasma discharge model to demonstrate its effect on material removal in magnetic-electrolytic plasma polishing. Firstly, we establish a mathematical model to describe plasma discharge induced by electron collision. The Boltzmann kinematic equations are employed to elucidate the physical dynamics of electrons and their momentum distribution function during ionization collisions. Secondly, we derive the surface material removal equation based on the instantaneous high-temperature melting of plasma discharge and establish the corresponding boundary conditions for simulation calculations. Subsequently, we conduct electromagnetic plasma polishing experiments under varying magnetic field intensities using TA1 titanium alloy as the test material. Our simulation results demonstrate that the magnetic field enhances the spatial electric field formed by the uneven distribution of ion electrons, expediting the plasma discharge process towards the anode and generating interference currents to counterbalance the required material removal current. Experimental data is provided to validate the model, consistently revealing a positive correlation between circuit current and material removal rate. The research demonstrates the rationality and reliability of the material removal model for plasma discharge, offering a fundamental understanding of electromagnetic plasma polishing.

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Section: Introductionmentioning

confidence: 99%

Material removal model for describing the plasma discharge effect in magnetic-electrolytic plasma polishing

Xiang,

Sun,

Yang

et al. 2024

Int J Adv Manuf Technol

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“…There are few reports on the research of EPPo on titanium alloys, mainly focusing on electrolyte and process optimization. Yongchun Zou et al studied multiple factors affecting surface quality during EPPo, including voltage, time, electrolyte temperature, and immersion depth, and optimized the parameters through orthogonal experiments [17]. Smyslova et al performed EPPo on a TC4 titanium alloy with an ultra-fine crystalline structure, discussed the electrolyte temperature and voltage range used, and studied the effect of processing time on surface roughness and material removal rate [18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrolytic Plasma Polishing on Surface Properties of Titanium Alloy

Yang,

Sun,

et al. 2024

Coatings

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Electrolytic plasma polishing (EPPo) is an advanced metal surface finishing technology with high quality and environmental protection that has broad application prospects in the biomedical field. However, the effect of EPPo on surface properties such as corrosion resistance and the wettability of biomedical titanium alloys remains to be investigated. This paper investigated the changes in surface roughness, surface morphology, microstructure, and chemical composition of Ti6Al4V alloy by EPPo and their effects on surface corrosion resistance, wettability, and residual stress. The results showed that Ra decreased from 0.3899 to 0.0577 μm after EPPo. The surface crystallinity was improved, and the average grain size increased from 251 nm to more than 800 nm. The oxidation behavior of EPPo leads to an increase in surface oxygen content and the formation of TiO2 and Al2O3 oxide layers. EPPo can significantly improve the corrosion resistance and wettability of titanium alloy in simulated body fluid and eliminate the residual stress on the sample surface. The surface properties are enhanced not only by the reduction in surface roughness but also by the formation of a denser oxide film on the surface, changes in the microstructure, an increase in surface free energy, and the annealing effect developed during EPPo. This study can provide guidance and references for applying EPPo to biomedical titanium alloy parts.

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Local surface smoothness on TC4 alloy during microbubbles flow electrolytic plasma polishing: prototype rig, phenomena, and mechanism

Wang,

Sun,

Yang

et al. 2024

Int J Adv Manuf Technol

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Optimization and mechanism of precise finishing of TC4 alloy by plasma electrolytic polishing

Cited by 9 publications

References 37 publications

Material removal model for describing the plasma discharge effect in magnetic-electrolytic plasma polishing

Material removal model for describing the plasma discharge effect in magnetic-electrolytic plasma polishing

Effect of Electrolytic Plasma Polishing on Surface Properties of Titanium Alloy

Local surface smoothness on TC4 alloy during microbubbles flow electrolytic plasma polishing: prototype rig, phenomena, and mechanism

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