Application of powder suspended in dielectric fluid for fine finish micro-EDM of Inconel 718

Prihandana, Gunawan Setia; Sriani, Tutik; Mahardika, Muslim; Hamdi, M.; Miki, Norihisa; Wong, Yoke San; Mitsui, Kimiyuki

doi:10.1007/s00170-014-6145-4

Cited by 66 publications

(39 citation statements)

References 12 publications

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“…MRR is augmented by increasing powder concentration as it multiplies the number of discharges [61]. Surface roughness is reduced as the energy per spark is reduced [59]. An optimum powder concentration is required as a continuous increase in concentration increases the extent of powder particles in the discharge gap which in turn impede the transfer of discharge energy to the workpiece.…”

Section: Pmedm Process Variablesmentioning

confidence: 99%

A systematic review on powder mixed electrical discharge machining

Joshi

Joshi²

2019

Heliyon

113

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The advancement in the field of material science has gifted us new electrically conductive materials having good mechanical properties and thermal characteristics. Machining these materials using conventional machining process is a challenging task. Electrical discharge machining (EDM) is a well-established machining process used to manufacture process hard materials having geometrically complex shapes, that are extremely difficult to machine traditionally. EDM is a thermo-electric process in which material is eroded by rapidly recurring sparks between the non-contacted electrode and workpiece. As there is no direct contact between the electrodes in EDM, machining defects like mechanical stresses, clattering & vibration do not create problems during machining. In spite of the advantages of the process, its use in industry is limited owing to poor surface finish and low volumetric material removal. To overcome these drawbacks, the metallic powder is mixed in the dielectric fluid, which increases its conductive strength and increases the spark gap distance between the tool and workpiece. This new evolved material removal process is called Powder Mixed Electrical Discharge Machining (PMEDM). The added powder significantly affects the performance of the EDM process. The objective of this review is to benefit the researchers to understand the PMEDM concept precisely and study the process parameters furthermore in particulars to get enhancements in the process to achieve better quality levels.

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Section: Pmedm Process Variablesmentioning

confidence: 99%

A systematic review on powder mixed electrical discharge machining

Joshi

Joshi²

2019

Heliyon

113

View full text Add to dashboard Cite

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“…Prihandana et al [28] investigated outcome of applying molybdenum disulfide (MoS 2 ) powder-mixed dielectrics on the micro-EDM yields for machining of Inconel 718. It was observed that MoS 2 powder suspension (with appropriate size and concentration) could produce superiorquality micro-holes.…”

Section: State Of Art and Problem Statementmentioning

confidence: 99%

Effect of using SiC powder-added dielectric media during electro-discharge machining of Inconel 718 superalloys

Sahu

Jadam

Datta

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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Inconel 718 is a nickel-based superalloy widely applied in aerospace, automotive and defense applications. Low thermal conductivity, extreme high temperature strength, high work-hardening characteristics make them 'difficult-to-machine.' In order to improve EDM performance on Inconel 718, powder-mixed electro-discharge machining is reported herein. PMEDM is carried out by mixing SiC powder in the dielectric media in consideration with varied peak discharge current. As compared to conventional EDM, the morphology and topographical features of the machined surface including surface roughness, crack density, white layer thickness, metallurgical aspects (phase transformation, crystallite size, micro-strain and dislocation density), material migration, residual stress as well as micro-indentation hardness, etc., are studied. Additionally, effects of peak discharge on PMEDM performance features, namely material removal rate, tool wear rate, surface roughness, surface crack density, white layer thickness, are discussed and compared with conventional EDM.

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“…Loss of surface integrity of machined Inconel specimen is due to excessive work hardening, rapid tool wear due to uneven strong stress field by thermo-mechanical coupling. Owing to the aforesaid problems, it seems really a challenge to machine Inconel by conventional machining processes and that too by conventionally used cutting tools and tool materials [1,3,12,24,27,29,34,39].…”

Section: Introductionmentioning

confidence: 99%

Machining performance optimization for electro-discharge machining of Inconel 601, 625, 718 and 825: an integrated optimization route combining satisfaction function, fuzzy inference system and Taguchi approach

Rahul

Abhishek

Datta

et al. 2016

J Braz. Soc. Mech. Sci. Eng.

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duty factor = 80%, flushing pressure = 0.3 bar] for Inconel 601; and [gap voltage = 80 V, peak current = 5 A, pulseon time = 300 µs, duty factor = 85%, flushing pressure = 0.4 bar] for Inconel 825. In addition to that, analysis of SEM micro-graphs has been carried out to understand surface irregularities in terms of surface cracks, white layer for EDMed Inconel end products (of different grades).

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Application of powder suspended in dielectric fluid for fine finish micro-EDM of Inconel 718

Cited by 66 publications

References 12 publications

A systematic review on powder mixed electrical discharge machining

A systematic review on powder mixed electrical discharge machining

Effect of using SiC powder-added dielectric media during electro-discharge machining of Inconel 718 superalloys

Machining performance optimization for electro-discharge machining of Inconel 601, 625, 718 and 825: an integrated optimization route combining satisfaction function, fuzzy inference system and Taguchi approach

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