Experimental Investigations on the Effect of Hybrid Aluminum and Graphite powders mixed Dielectric in EDM

Saharia, Neelabh Jyoti; Lakshmi, T. Sree; Surekha, B.; Jena, Hemalata

doi:10.1016/j.matpr.2018.06.420

Cited by 5 publications

(11 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, by increasing both the pulse time on and peak current parameters, MRR significantly increases [ 10 , 11 , 39 , 40 , 41 ]. By increasing the current, more electrons with a higher speed strike which produces high energy and more material melts as a result, which leads to a higher MRR [ 24 ]. Furthermore, when pulse time on increase, electrons strike for a longer time to erode the material which ultimately maximizes the MRR.…”

Section: Resultsmentioning

confidence: 99%

“…It can be noted that the MRR increases with an increase in both the peak current and particle concentration in dielectric [ 2 , 11 , 40 , 41 ]. At a fixed value of the peak current, the MRR increased with a higher particle concentration because multiple sparking generation took place at different locations between the tool and workpiece [ 24 ]. By increasing the conductive particle concentration, the bridging effect increases and a greater number of sparks are produced which increases the MRR.…”

Section: Resultsmentioning

confidence: 99%

“…At a fixed value of peak current, TWR slightly increased by increasing the pulse time on while at a single point of pulse time on, TWR increased with the peak current. However, by increasing both, TWR sharply increased and maximum TWR was observed at a higher setting of peak current and pulse time on [ 24 ]. Both factors simultaneously effect the TWR.…”

Section: Resultsmentioning

confidence: 99%

“…It was also found that MRR is significantly affected by the peak current (Ip) and powder concentration. Saharia N.J et al [ 24 ] used a mixture of both Aluminum and Graphite powder in concentrations of 2, 3 and 4 g/L along with kerosene oil as a dielectric to evaluate the machining attributes of steel EN19 material in electric discharge machining by altering the input parameters of EDM, i.e., Peak current (Ip), Voltage gap (Vg), Aluminum concentration per liter kerosene oil and Graphite concentration per liter kerosene oil. It was found that MRR and TWR decreased.…”

Section: Introductionmentioning

confidence: 99%

“…All the input parameters were varied in three levels as per the design of the experiment. Saharia, N. J. et al [ 24 ] conducted experiments on steel alloy EN-19 with a peak current of 6–10 A and concentration of powder in the dielectric of 2–4 g/L to check the effect on MRR and TWR. Yoo-Seok Kima, and Chong-Nam Chu [ 34 ] studied the tool wear by changing the polarity with graphite powder mixed in dielectric with the concentration ranging from 0.5 to 5 g/L.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Analysis of Particle Size and Concentration in Die Sinking Electric Discharge Machining

et al. 2022

View full text Add to dashboard Cite

Electric discharge machining with a powder mix dielectric is a promising technique to harden a work piece’s surface using electricity with a high energy density. The quality of the electrical discharge-machined surface is related to its surface integrity in which the surface’s roughness, residual stresses, micro hardness and surface micro cracks are some of the major factors. In this research, graphite powder was mixed in a dielectric with a particle size of 20 µm, 30 µm, and 40 µm, with the concentration of the graphite powder ranging from 2 g/L to 4 g/L. Moreover, the peak current and pulse time on were also coupled with an additive of graphite powder to investigate the effect on the surface quality, i.e., the recast layer thickness, micro hardness and crater depth as well as the material removal rate (MRR) and tool wear rate (TWR). A Box–Behnken design was employed to design the experiments and the experimental results revealed that the graphite powder size and concentration coupled with the electrical parameters (peak current and pulse time on) significantly influenced the recast layer thickness, micro hardness, crater size, MRR and TWR. The crater depth and micro hardness were maximized at a higher concentration and particle size, while the recast layer thickness was reduced with a higher gain size.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analysis of Particle Size and Concentration in Die Sinking Electric Discharge Machining

et al. 2022

View full text Add to dashboard Cite

show abstract

Advances in Abrasive Assisted EDM and Micro-EDM

Rashid

Jahan

2020

Materials Forming, Machining and Tribology

View full text Add to dashboard Cite

Influence of 4-dodecylbenzenesulfonic acid as a surfactant on a graphite-based dielectric in powder mixed electric discharge machining

Pellegrini

Ravasio

Rosace

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

A recent trend in micro EDM is the addition of powders into the dielectric. The presence of powders helps to lower the dielectric breakdown voltage and therefore the discharge occurs early. As a result, the discharge energy is better distributed, resulting in a greater number of discharges, each with less energy. The main advantage of using this method is the improvement of both the process performance and surface finishing of the workpiece. A critical aspect of the implementation of this technology is in general the management of the powder. In fact, to obtain advantages during the machining, the powders should be maintained dispersed into the dielectric to avoid their aggregation. This paper aims to study the concentration of the powder and the surfactant in the dielectric fluid on micro EDM drilling performance. Titanium alloy was used as workpiece material, hydrocarbon oil as dielectric, graphite as powder and 4dodecylbenzenesulfonic acid as surfactant. The performance was evaluated considering the Material Removal Rate, the Tool Wear Ratio and the geometrical characteristics of the holes (overcut and taper rate). Graphite content positively affected both Material Removal Rate and Tool Wear Ratio; a larger spark gap was observed as well. The use of surfactant is required for mix stability but increasing its percentage generally reduces the effects of graphite and increases data dispersion as well.

show abstract

Experimental Investigations on the Effect of Hybrid Aluminum and Graphite powders mixed Dielectric in EDM

Cited by 5 publications

References 5 publications

Analysis of Particle Size and Concentration in Die Sinking Electric Discharge Machining

Analysis of Particle Size and Concentration in Die Sinking Electric Discharge Machining

Advances in Abrasive Assisted EDM and Micro-EDM

Influence of 4-dodecylbenzenesulfonic acid as a surfactant on a graphite-based dielectric in powder mixed electric discharge machining

Contact Info

Product

Resources

About