Experimental investigation for surface roughness during electrical discharge machining process of super alloy inconel 718 using silicon powder mixed dielectric

Lepcha, Leeom P.; Dewan, P. R.; Phipon, Ruben

doi:10.1063/5.0024915

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…Introducing powder particles to the dielectric fluid of the EDM process is also referred to as PMEDM (Powder Mixed Electric Discharge Machining) process. Due to the artificial residues, the dielectric resistance was broken down more efficiently, and the machined areas had an excellent finish on the surface [6]. On the converse side, the drawbacks of electro-discharge machining are its relatively leisurely machining process and a moderate material removal rate (MRR).…”

Section: Introductionmentioning

confidence: 99%

Parameter optimization and surface integrity aspects in MWCNT-based nano-PMEDM process of Inconel 718

Khatun,

Amin,

Mashuk

et al. 2023

Res. Eng. Struct. Mat.

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This study examines the effects of Inconel 718's Nano PMEDM process parameters on Material Removal Rate (MRR), Tool Wear Rate (TWR), Surface Roughness (SR), and the integrity of surface and subsurface layers. It also examines the concentration of MWCNT nanoparticles in distilled water as a dielectric medium. Peak Current, Pulse on Time, and Powder Concentration were input variables in 20 experimental runs utilizing the Central Composite Design (CCD) of Design of Expert (DOE). To create and evaluate empirical models for MRR, TWR, and SR, response surface methodology (RSM) and ANOVA were used. According to the results of the improved RSM, the best responses for MRR, TWR, and SR are 0.012 g/min, 0.001 g/min, and 5.098 µm, respectively. These were accomplished by cutting parameters of 1.5 g/L for powder concentration, 307.967 s for pulse on time, and 19.925 Amps for peak current. GA optimization produced slightly different optimal values for MRR, TWR, and SR: 0.012 g/min, 0.003 g/min, and 5.229 µm, respectively. 20.178 Amps for Peak Current, 398.753 seconds for Pulse on Time, and 3.66 g/L for Powder Concentration were the suggested ideal cutting conditions for GA optimization. In the validation tests, both the GA-predicted outcomes and RSM-optimized values closely matched the experimental results.

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Section: Introductionmentioning

confidence: 99%

Parameter optimization and surface integrity aspects in MWCNT-based nano-PMEDM process of Inconel 718

Khatun,

Amin,

Mashuk

et al. 2023

Res. Eng. Struct. Mat.

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EFFECT OF PROCESS PARAMETERS ON THE PERFORMANCE OF POWDER MIXED EDM OF Ni-BASED SUPERALLOYS: A REVIEW

Uddin¹,

Barma²,

Majumder³

2023

Surf. Rev. Lett.

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Ni-based superalloys fall under the category of difficulty in machining type material owing to their poor thermal conductivity and high strength at extreme temperatures. Machining such materials using the traditional approach is a tremendously difficult task. On the other hand, EDM, one of the most sophisticated electro-thermal manufacturing processes, is used to machine such materials. It is a well-known non-traditional machining process for generating parts that require accuracy, have complex shapes, and are small in size. However, the use of EDM in Ni-based superalloys has some disadvantages like poor surface finish and low material removal rate. So, to alleviate these disadvantages, researchers introduced powder mixed dielectric fluid in the EDM process. Further, the performance of this technique has been enhanced by studying the effect of various nano/micro-size particles and their concentrations in the dielectric medium. In this paper, the authors have reviewed the impact of non-electrical and electrical process parameters on the output responses when machining Ni-based superalloys using powder mixed EDM. The challenges faced during the conventional machining of Ni-based superalloys and the mechanism proposed for powder mixed EDM, especially under the influence of suspended powders into the dielectric medium have also been presented in this paper. Finally, future research areas of powder mixed EDM of Ni-based Superalloys, such as (i) its modelling and simulation and (ii) the effect of tool motion and powder properties on its performance, are discussed in brief.

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Experimental investigation for surface roughness during electrical discharge machining process of super alloy inconel 718 using silicon powder mixed dielectric

Cited by 2 publications

References 9 publications

Parameter optimization and surface integrity aspects in MWCNT-based nano-PMEDM process of Inconel 718

Parameter optimization and surface integrity aspects in MWCNT-based nano-PMEDM process of Inconel 718

EFFECT OF PROCESS PARAMETERS ON THE PERFORMANCE OF POWDER MIXED EDM OF Ni-BASED SUPERALLOYS: A REVIEW

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