Influence of Variant Electrolyte in Electrochemical Micromachining of Micro Holes in SMA Using Taguchi Optimization

Mouliprasanth, B.; Hariharan, P.

doi:10.1134/s1023193521030095

Cited by 10 publications

(3 citation statements)

References 18 publications

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“…They results reveal that the usage of citric acid for the copper work materials produce the non-conductive dissolved products which surround the tool and creates insulating effect on the tool for improving micro-hole accuracy. Mouliprasanth et al [11] tried the different electrolyte for machining shape memory alloy in EMM with SS electrode. Among those electrolytes passivating electrolyte shows higher machining rate compared to the non-passivating electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Enhancing MRR and accuracy with magnetized graphite tool in electrochemical micromachining of copper

Palaniswamy¹,

Seeniappan²,

Thanigaivelan

et al. 2023

CI&CEQ

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Micro hole is the fundamental feature found in any device/components. Hence this paper aims to produces the micro holes using electrochemical micromachining (EMM). The existing machining techniques in EMM for creating micro holes are associated with more overcut (OC). Hence, it is very essential to reduce OC and enhance the machining rate (MR). This paper aspires to investigate the effect of graphite electrode with magnetic force on copper plate. Four different tools namely electromagnetic graphite tool (EMGT), permanent magnet graphite tool (PMGT), graphite tool and stainless steel (SS) tool are employed for these experiments. The major influencing factors are machining voltage in volts, duty cycle in % and electrolyte concentration in g/l was considered on MR and OC. The results exposed that EMGT, PMGT and graphite electrodes produce MR of 106.4%, 74.6 % and 44.5 % over SS tool at parameter level of 23 g/l, 15 V, and 85% respectively. Graphite and EMGT electrode resulting in 11.9% and 3.41 % reduced OC respectively than SS tool at parameter level of 8V, 95% and 28 g/l. Additionally, scanning electron microscope (SEM) picture examination is conducted to identify the magnetic field effect on the work surface.

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Section: Introductionmentioning

confidence: 99%

Enhancing MRR and accuracy with magnetized graphite tool in electrochemical micromachining of copper

Palaniswamy¹,

Seeniappan²,

Thanigaivelan

et al. 2023

CI&CEQ

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“…Sodium nitrate, ethylene glycol, polyethylene glycol and their combination of electrolytes possess inherent capability to produce micro holes, array patterns in different types of materials that includes SS304, 316L, copper, titanium, nimonic, nitinol and cobalt based alloys with good accuracy and surface finish [26][27][28][29][30][31][32][33]. The usage of passivating, non passivating electrolyte and combination of electrolytes that is composite type electrolyte resulted in improvement of microhole precision in ECMM process [34]. Combination of electrolyte with passivating, non passivating and composite type electrolyte like ethylene glycol, polyethylene glycol provides advantages of better machining rate and surface finish for nickel based nimonic and shape memory alloys [34,35].…”

Section: Introductionmentioning

confidence: 99%

“…The usage of passivating, non passivating electrolyte and combination of electrolytes that is composite type electrolyte resulted in improvement of microhole precision in ECMM process [34]. Combination of electrolyte with passivating, non passivating and composite type electrolyte like ethylene glycol, polyethylene glycol provides advantages of better machining rate and surface finish for nickel based nimonic and shape memory alloys [34,35]. Various researchers have identified and analyzed different types of electrolytes among acids, base and neutral salts and optimized parameters to machine micro geometries in ECMM.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of surface integrity in electrochemical micromachining of A286 super alloy

Rajkeerthi¹,

Hariharan²

2021

Surf. Topogr.: Metrol. Prop.

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Surface integrity of micro components is a major concern particularly in manufacturing industries as most geometry of the products must meet out necessary surface quality requirements. Advanced machining process like electrochemical micro machining possess the capabilities to machine micro parts with best surface properties exempting them from secondary operations. In this research work, different electrolytes have been employed for producing micro holes in A286 super alloy material to achieve the best surface quality and the measurement of surface roughness and surface integrity to evaluate the machined surface are carried out. The machined micro hole provides detailed information on the geometrical features. A study of parametric analysis meant for controlling surface roughness and improvement of surface integrity has been made to find out the suitable parameters for machining. The suitability of various electrolytes with their dissolution mechanism and the influence of various electrolytes have been thoroughly studied. Among the utilized electrolytes, EG + NaNO3 electrolyte provided the best results in terms of overcut and average surface roughness.

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Study of the electrochemical dissolution behavior of Nitinol shape memory alloy in different electrolytes for micro-ECM process

Sethi

Acharya

Saha

2022

Int J Adv Manuf Technol

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Nickel-Titanium alloy (Nitinol) is an excellent shape memory alloy (SMA) for Micro electro-mechanical systems (MEMS) particularly in biomedical applications owing to its three excellent features like shape memory effect (SME), superelasticity, and biocompatibility. The fabrication of micro features on Nitinol SMAs through conventional machining has been challenging due to its temperature-dependent material transformation properties. Micro electrochemical machining (micro-ECM), a nonconventional machining method for conductive material irrespective of strength and hardness has the potential for microfeature fabrication on Nitinol. This study presents the investigation on electrochemical dissolution behavior of Nitinol in different electrolytes for micro-ECM. The in uence of electrolytes on the nature of dissolution of Nitinol has been studied by fabricating microchannels in three levels of parameters containing applied voltage and electrolyte concentration. The rst three electrolytes were all aqueous neutral electrolytes i.e. sodium chloride (NaCl), sodium nitrate (NaNO 3 ), and sodium bromide (NaBr). For profound analysis of dissolution behavior and its in uence on machining performance, potentiodynamic polarization (PDP) tests of Nitinol were performed in aqueous NaCl, aqueous NaNO 3, and aqueous NaBr solutions. The PDP tests that are conducted here are cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The three aqueous solutions were utilized for microchannel fabrication in Nitinol through micro ECM in three levels of parameters out of which aqueous NaNO 3 was successful in fabricating microchannel. Then nonaqueous electrolyte of ethylene glycol-based NaNO 3 has been used to fabricate microchannels with lower depth overcut (DOC), width overcut (WOC), and length overcut (LOC) with respect to aqueous NaNO 3 electrolyte.

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Influence of Variant Electrolyte in Electrochemical Micromachining of Micro Holes in SMA Using Taguchi Optimization

Cited by 10 publications

References 18 publications

Enhancing MRR and accuracy with magnetized graphite tool in electrochemical micromachining of copper

Enhancing MRR and accuracy with magnetized graphite tool in electrochemical micromachining of copper

Evaluation of surface integrity in electrochemical micromachining of A286 super alloy

Study of the electrochemical dissolution behavior of Nitinol shape memory alloy in different electrolytes for micro-ECM process

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