Enhancement of surface roughness in electrochemical machining of Ti6Al4V by pulsating electrolyte

Qu, Ningsong; Fang, Xiaolong; Zhang, Y. D.; Zhu, Daiyin

doi:10.1007/s00170-013-5238-9

Cited by 59 publications

(22 citation statements)

References 18 publications

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“…It is well known that the anodic electrochemical dissolution process depends on the material of the anode workpiece, the electrolyte [4][5][6] and the power supply [7,8]. Anodic dissolution experiments have been carried out on different metals.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the electrochemical dissolution behavior of Inconel 718 and 304 stainless steel at low current density in NaNO3 solution

Wang

Zhu

Wang

et al. 2015

Electrochimica Acta

177

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Section: Introductionmentioning

confidence: 99%

Investigation of the electrochemical dissolution behavior of Inconel 718 and 304 stainless steel at low current density in NaNO3 solution

Wang

Zhu

Wang

et al. 2015

Electrochimica Acta

177

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“…According to the literature, an electrolyte property plays a vital role in increasing MRR. Significant improvement in MRR and R a was observed when the pulsating electrolyte with frequency of 10 Hz and amplitude of 0.2 MPa used in ECM [8]. MRR was accelerated more with an increase in pH value of electrolyte than the catalytic effect of hydroxide ions [9].…”

Section: Introductionmentioning

confidence: 77%

Experimental investigation on the performance improvement of electrochemical machining process using oxygen-enriched electrolyte

Ayyappan¹,

Sivakumar²

2014

Int J Adv Manuf Technol

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This paper investigates the performance enhancement of electrochemical machining (ECM) process by oxygenated aqueous sodium chloride (NaCl) electrolyte. It is experimentally found that the performance parameters such as material removal rate (MRR) and surface roughness (R a ) are greatly improved with this new mix of electrolyte. The oxygen gas is suitable to electrochemically react with aqueous NaCl solution to enhance the oxidation of metal oxides on the machined surface to increase the MRR. In this work, experimental investigations are conducted with both aqueous NaCl electrolyte and oxygenated aqueous NaCl electrolyte on the alloy steel specimen (20MnCr5). Largest MRR of 7.33 g/min with R a of 1.90 μm is obtained in oxygenated NaCl environment compared to MRR of 1.98 g/min and R a of 3.13 μm in aqueous NaCl environment with machining conditions of voltage (V) of 17 V, tool feed rate (F) of 0.5 mm/min, and electrolyte concentration (EC) of 142.5 g/l of water. Microstructure of surface of the specimen machined with oxygenated aqueous NaCl electrolyte is more homogeneous and promises a good surface quality.

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“…However, chloride ions in an electrolyte always lead to a linear dissolution during the machining, which is not suitable for precision electrochemical micromachining. A mixed electrolyte with chloride ions and nitrate ions was also introduced in ECM [15]. NaNO 3 solution as a nonlinear electrolyte is widely used in ECM for improving the machining accuracy.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical micromachining of micro-dimple arrays on the surface of Ti-6Al-4V with NaNO3 electrolyte

Chen

Hou

2016

Int J Adv Manuf Technol

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Titanium alloys are widely used in the aerospace and biomedical industries. Micro-dimple arrays, as a kind of surface texture, have been applied on titanium alloy surfaces to enhance tribological behaviour as well as to affect the biological performance of titanium implants. Through-mask electrochemical micromachining (TMEMM) is a promising approach to generate micro-dimple arrays on metal surfaces. In general, sodium bromide and methanol-sulfuric acid, which could dissolve the passive oxide layer on titanium alloy surfaces, are used as electrolytes to generate micro-dimple arrays. However, these electrolytes are caustic, which can damage the equipment, and are unfavourable for industrial applications. In this paper, an environmentally friendly NaNO 3 electrolyte was employed to generate micro-dimple arrays on titanium alloy surfaces in TMEMM with a reusable mask; this made the process more efficient and safer. Experiments showed that there was serious stray corrosion on the titanium alloy surfaces when the micro-dimple arrays were generated using direct current. To obtain high-quality micro-dimple arrays, a pulsed current was employed in TMEMM. The results showed that machining parameters of applied voltage of 24 V, pulse duty cycle of 10 % and frequency of 100 Hz were appropriate to improve the machining quality. Micro-dimple arrays with no stray corrosion were thus generated. Moreover, the electrolyte temperature also influenced the machining accuracy, and a low electrolyte temperature of 20°C was useful to reduce the undercutting of micro-dimples and improve machining localization. With the optimized parameters, micro-dimples with a diameter of 110 μm and depth of 20 μm were generated.

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Enhancement of surface roughness in electrochemical machining of Ti6Al4V by pulsating electrolyte

Cited by 59 publications

References 18 publications

Investigation of the electrochemical dissolution behavior of Inconel 718 and 304 stainless steel at low current density in NaNO3 solution

Investigation of the electrochemical dissolution behavior of Inconel 718 and 304 stainless steel at low current density in NaNO3 solution

Experimental investigation on the performance improvement of electrochemical machining process using oxygen-enriched electrolyte

Electrochemical micromachining of micro-dimple arrays on the surface of Ti-6Al-4V with NaNO3 electrolyte

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