EDM performance of Inconel 718 superalloy: application of multi-walled carbon nanotube (MWCNT) added dielectric media

Jadam, Thrinadh; Sahu, Santosh Kumar; Datta, Saurav; Masanta, Manoj

doi:10.1007/s40430-019-1813-9

Cited by 56 publications

(17 citation statements)

References 82 publications

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“…Owing to the release of trapped gases during the solidification, pockmarks appeared on the machined surface. Molten debris solidifies and spread as globules on the machined surface due to surface tension [35]. The SEM images of the test piece which were showing highest MRR (Ton=113 µs, Toff=54 µs, Ip=11 A, Uw=4 m/min) depicted in Figure 7 It was perceive that at the highest value of MRR (3.073 mm 3 /min), wide and deep craters has developed because of higher pulse duration (113 µs) and peak current (11 A), depicts in Figure 7.…”

Section: Microstructure Characterization Of Surfacementioning

confidence: 99%

Analysis of control factors and surface integrity during wire-EDM of Inconel 718 alloy using T-GRA approach

Asgar

Singholi²

2021

EMITTER Int'l J. of Engin. Technol.

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In today’s competitive modern manufacturing sectors, there is a vital need of utter precision and rigorous processing using various manufacturing approaches that directly influences the cost and processing duration of mechanized materials in addition to the consistency of the finished products. Therefore, it’s essential to figure out the required output by adjusting the control factors of any machining techniques which resulted in optimal values of the desired outcome. In this study, machining evaluation and process optimization is carried out on volumetric extraction of material namely material removal rate (MRR), kerf obtained during the machining (KW) and surface roughness (SR) of Inconel 718 superalloy during CNC controlled wire- electrical discharge machining. Four controllable factors- pulse interval, wire speed, pulse duration and peak current are considered to investigate the influence on performance measures. Taguchi's L16 has been used to construct the set of experiments before physical experimental runs and most influencing factors have been evaluated using ANOVA. SEM images and EDXS analysis have been resorted to examine the morphology of Inconel 718. These findings assist in identifying the topography of the machined surface. Further, the optimum integration has been obtained for the best yield and recorded using grey relational analysis integrated with Taguchi’s technique (T-GRA). The unfamiliarity of the work is based on consideration of zinc coated thin wire electrode and Taguchi-Grey combined approach of modelling with four levels of experimental design.

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Section: Microstructure Characterization Of Surfacementioning

confidence: 99%

Analysis of control factors and surface integrity during wire-EDM of Inconel 718 alloy using T-GRA approach

Asgar

Singholi²

2021

EMITTER Int'l J. of Engin. Technol.

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“…Thrinadh Jadam et al added multi-walled carbon nanotubes (MWCNT) at a concentration of 0.5 g/l to kerosene as a dielectric for EDM and conducted experiments by varying the peak discharge current. The experimental results show that the use of MWCNT hybrid dielectric can signi cantly improve the machining performance compared to conventional EDM [21] . Yi Jiang et al used air and argon as gas media for EDM (Air-EDM and Ar-EDM, respectively) for the electrical discharge machining of TC4 titanium alloy and Cr12 steel.…”

Section: Introductionmentioning

confidence: 98%

Experimental study of EDM characteristics using a 5-DOF controllable magnetic levitation actuator

Luan

Zhang²,

Xu³

et al. 2022

Int J Adv Manuf Technol

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The e ciency and accuracy of conventional electrical discharge machining (EDM) is limited by the stability of the voltage between the poles. To improve the e ciency of EDM, this paper proposes a machining method that combines a self-developed 5-degree-of-freedom (5-DOF) controllable magnetic levitation actuator with a conventional EDM machine tool. The stability of the inter-pole voltage is improved by the actuator micro-adjustment the electrodes of the EDM machine tool. Firstly, an EDM control system with local current feedback and decoupling control elements is designed based on the EDM servo drive principle to improve the response speed and positioning accuracy of the actuator. Secondly, the actuator was connected to the spindle of a conventional EDM machine tool, and machining experiments were carried out. The experimental results showed that the EDM machine tool connected to the actuator could control the electrode position more quickly, adjust the discharge state quickly, and increase the number of discharges per unit time. The average machining speed increased from 1.108µm/s to 3.925µm/s, which is 3.54 times faster than conventional EDM. Finally, complex shape machining experiments were carried out and the machining results showed that by adjusting the target value of the radial direction of the actuator, the various trajectories of the electrode could be controlled to depict arbitrary shapes.

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“…Therefore, dielectric fluid containing nanotubes/grapheme sheets is expected to have better thermal conductivity and enhance the machining performance and surface quality [27].…”

Section: Introductionmentioning

confidence: 99%

“…Obtained results have shown that Ton lower than 125 µs would be helpful in the minimization of micro-crack and RLT. Jadam et al [27] used MWCNT amount in the dielectric fluid to investigate nickel-based super-alloys EDM performance. The effect of current was also studied along with the MWCNT amount.…”

Section: Introductionmentioning

confidence: 99%

Effect of Multi-walled carbon nanotubes on the performance evaluation of Nickel-based super-alloy–Udimet 720 machined using WEDM process

Chaudhari¹,

Ayesta

Doshi³

et al. 2022

Preprint

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The diverse capabilities of nickel-based super-alloy (Udimet 720), like robust mechanical strength, ductility, resistance to excessive temperature deformation, and advanced corrosion and oxidation resistance, make it suitable for use in multiple applications. These super-alloys are identified as extremely difficult materials for machining to meet feature and manufacturing requirements. In the present work, we demonstrated the machining of Udimet 720 by employing the wire-electrical discharge machining (WEDM) technique. Pulse-on-time (Ton), Pulse-off-time (Toff), current, and MWCNT amount were preferred as input variables. The effect of selected design variables was studied on material removal rate (MRR), surface roughness (SR), and recast layer thickness (RLT). Box Behnken design was utilized to design an experimental matrix. For statistical analysis, analysis of variance (ANOVA) was employed. From ANOVA, the current had the highest contributor with 35.85% to affect MRR, while MWCNT amount was found to be the highest contributor for deciding the values of both SR and RLT with contributions of 42.66% and 40.07%, respectively. The addition of MWCNT at 1 g/L has substantially improved MRR from 0.8546 g/min to 1.2199 g/min, SR reduced from 5.88 µm to 2.98 µm, and reduction in RLT from 17.8 µm to 11.61 µm. The passing vehicle search (PVS) algorithm was implemented, and the results of single-objective optimization presented the largest MRR of 1.8883 g/min, least SR of 1.89 µm, and least RLT of 9.70 µm. Additionally, a set of non-dominated solutions was obtained through Pareto optimal fronts. A small acceptable deviation was detected among the actual and forecasted results from PVS algorithm. It clearly reveals the acceptance of the PVS technique in the present study for Udimet 720. Lastly, the significance of MWCNT amount on surface textures was revealed by employing scanning electron microscopy (SEM).

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EDM performance of Inconel 718 superalloy: application of multi-walled carbon nanotube (MWCNT) added dielectric media

Cited by 56 publications

References 82 publications

Analysis of control factors and surface integrity during wire-EDM of Inconel 718 alloy using T-GRA approach

Analysis of control factors and surface integrity during wire-EDM of Inconel 718 alloy using T-GRA approach

Experimental study of EDM characteristics using a 5-DOF controllable magnetic levitation actuator

Effect of Multi-walled carbon nanotubes on the performance evaluation of Nickel-based super-alloy–Udimet 720 machined using WEDM process

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