An experimental and computational study on the feasibility of bio-dielectrics for sustainable electrical discharge machining

Das, Shirsendu; Paul, Swarup; Doloi, B.

doi:10.1016/j.jmapro.2019.04.005

Cited by 38 publications

(16 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The deposit of powder increased with the increase in powder concentration and surface roughness decreased up to a certain level. Das et al [27] used bio-dielectrics to machine Ti6Al4V with Cu electrode and found that surface roughness (SR) is decreased by bio-dielectrics as compared to kerosene. Tong et al [28] worked on rough and finish machining to generate 3D cavities.…”

mentioning

confidence: 99%

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

et al. 2020

View full text Add to dashboard Cite

Surface modification is given vital importance in the biomedical industry to cope with surface tissue growth problems. Conventionally, basic surface treatment methods are used which include physical and chemical deposition. The major drawbacks associated with these methods are excessive cost and poor adhesion of coating with implant material. To generate a bioactive surface on an implant, electric discharge machining (EDM) is a promising and emerging technology which simultaneously serves as machining and surface modification technique. Besides the surface topology, implant material plays a very important role in surgical applications. From various implant materials, titanium (Ti6Al4V ELI) alloy is the best choice for long-term hard body tissue replacement due to its superior engineering, excellent biocompatibility and antibacterial properties. In this research, EDM’s surface characteristics are explored using Si powder mixed in dielectric on Ti6Al4V ELI. The effect of powder concentration (5 g/L, 10 g/L and 20 g/L) along with pulse current and pulse on time is investigated on micro and nanoscale surface topography. Optimized process parameters having a 5 g/L powder concentration result in 2.76 μm surface roughness and 13.80 μm recast layer thickness. Furthermore, a nano-structured (50–200 nm) biocompatible surface is fabricated on the surface for better cell attachment and growth. A highly favourable carbon enriched surface is confirmed through EDS which increases adhesion and proliferation of human osteoblasts.

show abstract

mentioning

confidence: 99%

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

et al. 2020

View full text Add to dashboard Cite

show abstract

“…We noticed that this varied considerably, i.e., from 1.16-16.2 min. Although some of these processing times were quite short, this was due to the fact that the working regimes used in the current study were much more intense than those presented in the literature (up to three times) [16,[20][21][22]. The results showed a decrease in the processing time of stainless steel (up to 44% for the most intense working regime) when the mineral oil was replaced by edible oils.…”

Section: Processing Timementioning

confidence: 50%

“…Singaravel et al [21] recently reported that vegetable oils (sunflower oil, canola oil and Jatropha curcas oil) showed similar dielectric properties and erosion mechanisms compared to kerosene when they were used for the electric discharge machining of a titanium alloy (Ti6Al4V), also providing a cleaner and safer machining environment. Das et al [22] also carried out a study on Jatropha curcas oil, canola oil and neem oil as alternatives to conventional kerosene for EDM of Ti6Al4V alloy. The authors concluded that vegetable oils (especially Jatropha curcas and canola oils) lead to better output (i.e., MRR, SR, overcut and tapper cut) but mentioned that a specific range of flushing velocity should be used.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Stability of Vegetable Oils Used as Dielectric Fluids for Electrical Discharge Machining

et al. 2020

View full text Add to dashboard Cite

One main drawback of electrical discharge machining (EDM) is related to the dielectric fluid, since it impacts both the environment and operator health and safety. To resolve these issues, recent research has demonstrated the technical feasibility and qualitative performance of vegetable oils as substitutes for hydrocarbon-based dielectric and synthetic oils in EDM. However, due to the higher content of unsaturated fatty acids, vegetable oils lose their stability, due to several factors such as heating or exposure to light or oxygen. The present study is a first attempt to analyze the extent to which the physic-chemical properties of vegetable oils change during EDM processing. Refractive index, dynamic viscosity and spectra analyses were conducted for sunflower and soybean oils. The results revealed that, under the applied processing conditions, no structural changes occurred. These findings are very promising from the perspective of EDM sustainability.

show abstract

“…However, the application of these alternative oils for industrial utilization has not been noticed so far. Moreover, few studies claim that these oils cause poor heat dissipation and can be responsible for heat-affected (HAZ) surfaces [16]. Therefore, a critical review of the existing literature has been performed in this article, which includes discussion on the various aspects of EDM, to ensure its significant contribution to specify the impacts of different dielectrics and also attempted a little to entertain the sustainable machining.…”

Section: Recent Trends and Sustainabilitymentioning

confidence: 99%

“…In every aspect, the jatropha has been proven to be potential with comparatively more MRR, less SR, and better MH properties. ANOVA claimed current and pulse-on time as most important parameters for the responses like MRR and SR. Das et al [16] compared the impacts of jatropha, canola, and neem along with the conventional kerosene to assess the impacts on MRR, SR, overcut (OC), and taper cut (TC) under various ranges of responses and flushing velocities.…”

Section: Vegetable Oils As Dielectricsmentioning

confidence: 99%

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Das

Paul

Doloi

2020

J Braz. Soc. Mech. Sci. Eng.

Self Cite

View full text Add to dashboard Cite

Low removal rate, high power consumption, and dependency on conventional fuels (kerosene as a dielectric) are some premier issues that keep the sustainability index of EDM low, though it has huge acceptability and popularity mostly in aviation sectors and biomedical instrumentation to machine some extensively hard ferrous and nonferrous metal/metal alloys. Besides these, the thermal agitation inside the fusion/machining zone partially burns the dielectrics and tool-workpiece-metal, which evolve some oxides/monoxides. These evolved gases promote an unhygienic breathing atmosphere, which is very much harmful to the operator's health. Sometimes because of inadequate flushing pressure and velocity, carbon particles deposited inside the crater makes the spark unstable and releases carbon monoxide when the temperature exceeds its melting point. According to ISO 14000, every manufacturing process must be comprised of the sustainability criteria, which maintains a compromised balance between the economic, environmental, and social aspects, including the issue of the operator's health. But in real practices, it is very tough to maintain a stoichiometric balance between all these constraints. The article intensely focuses on the issue of emergence of gases during machining and tries to promote the utility of some alternative vegetable oil-based dielectrics, which are experimentally justified as a potent alternative of conventional kerosene. Apart from these, it includes some comparative talks on dielectric nature and their impacts on the responses and surface properties. Finally, this article highlights some compromise solutions which are probably capable of mitigating the hurdles to some extent, so that the sustainable machining can be encouraged in real sense.

show abstract

An experimental and computational study on the feasibility of bio-dielectrics for sustainable electrical discharge machining

Cited by 38 publications

References 20 publications

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

Experimental Investigation of Stability of Vegetable Oils Used as Dielectric Fluids for Electrical Discharge Machining

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Contact Info

Product

Resources

About