Performance and Surface Integrity of Nimonic75 Alloy Machined by Electrical Discharge Machining

Choudhary, Rajesh; Gupta, Vivek; Batra, Yogesh; Singh, Akashdeep

doi:10.1016/j.matpr.2015.07.324

Cited by 19 publications

(5 citation statements)

References 6 publications

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“…But the value of KW decreases with the increase of servo voltage as shown in Figure 6(c). This is due to the fact that debris modified the plasma channel and the plasma channel widened and enlarged (Zhao et al , 2002; Chaudhuri et al , 2015). This decreased electric density, as a result, even and more distribution of the spark produced, which generates shallow craters on the workpiece.…”

Section: Resultsmentioning

confidence: 99%

Optimization of WEDM process parameters in machining Nimonic 75 alloy using brass wire

Singh

Kumar

Kapoor

2020

MMMS

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PurposeAn experimental study has been conducted to model and optimize wire electric discharge machining (WEDM) process parameters such as pulse-on time, pulse-off time, servo voltage and peak current for response characteristics during machining of Nimonic 75 alloy.Design/methodology/approachThe response surface methodology (RSM)-based Box–Behnken's design has been employed for experimental investigation. RSM is used for developing quadratic regression models for selected response variables i.e. material removal efficiency and kerf width. To validate the model, confirmation experiments have been performed. The multi-response optimization has been done using desirability function approach.FindingsThrough analysis of variation, the percent contribution of process parameters on the response characteristics has been found. Pulse-off time is the most significant parameter affecting the kerf width and material removal efficiency followed by pulse-on time. The quadratic regression models have been developed for prediction of selected response variables. An attempt has been made to optimize the WEDM parameters for material removal efficiency and kerf width. The recommended process parameter setting for maximum material removal efficiency and minimum kerf width have been found to be pulse-on time = 0.6 µs, pulse-off time = 14 µs, servo voltage = 25 V and peak current = 200 A.Originality/valueThe “kerf width” is an important response variable for maintaining dimensional accuracy of the machined component, but has not been given due attention by the researchers. In the present work, the developed regression model for “kerf width” can be used in estimating wire offset setting and thereby getting a dimensionally accurate product. The optimum process parameters obtained in WEDM of Nimonic 75 alloy will contribute in database of machining. The outcome of this study would be added to scare database of the machining of Nimonic 75 alloy and also would be extremely useful for making the technology charts for WEDM.

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Section: Resultsmentioning

confidence: 99%

Optimization of WEDM process parameters in machining Nimonic 75 alloy using brass wire

Singh

Kumar

Kapoor

2020

MMMS

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“…Choudhary et al [19] reported that the negative polarity electrode used in the EDM of Nimonic 75 produces a much better surface finish than the positive polarity due to less material being removed by the negative polarity tool (Figure 19). However, due to its high erosion rate, a large amount of Cu deposition was observed on the machined surface.…”

Section: Literatures On Edm Of Nimonic Alloymentioning

confidence: 99%

“…Nimonic superalloys are capable of retaining the hardness even at higher temperatures and suppressing plastic deformation and chip formation. But, due to the low thermal conductivity of Nimonic superalloys, thermal stresses are induced in work and tool material (TM), leading to faster tool failure [19,20]. The built-up edge (BUE) formation is another problem in conventional machining of difficult-to-cut material, which leads to tool wear due to adhesion [21].…”

Section: Introductionmentioning

confidence: 99%

A review on conventional and nonconventional machining of Nickel-based Nimonic superalloy

Prasad

G.S

2023

Manufacturing Rev.

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Superalloys have gained prominence in recent years in various sectors, namely, spacecraft, marine, power, defense, vehicular and others, due to their ability to withstand high temperatures of up to 980 °C without deformation. Nimonics are Nickel-based superalloys usually known to be hard-to-machine materials due to their high strength at high temperatures, higher hardness, low thermal conductivity, and tendency to react with tool material. All these factors increase the level of difficulties in the machining of Nimonic superalloys. Numerous studies have examined various facets of machining of Nimonic alloys. This article summarizes the observation from 152 research articles to offer a reasonable engineering overview of the study of Nimonic alloys. An overview of Nimonic superalloys and their applications is given first. Then, various conventional and non-conventional machining processes, problems associated with multiple machining processes and methods to rectify the issues concerning the machining process have been reported. Thus, this summary will certainly help industrialists and academic researchers for further research work in machining Nimonic alloys.

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“…[17]. Nimonic alloys show excellent high temperature properties but are difficult to machines and the work on micro manufacturing are less reported [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Multiple Response Optimization of Dimensional Accuracy of Nimonic Alloy Miniature Gear Machined on Wire Edm Using Entropy Topsis Andpareto Anova

Chaudhary¹,

Siddiquee²,

Chanda³

et al. 2021

Computer Modeling in Engineering &Amp; Sciences

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The purpose of this research is to obtain the optimum cutting parameters to achieve the dimensional accuracy of Nimonic alloy miniature gear manufactured using Wire EDM. The cutting parameters investigated in this study are current, pulse on time (PON), pulse off time (POFF), wire tension (WT) and dielectric fluids. Ethylene glycol, nanopowder of alumina and oxygen are mixed to demineralized water to prepare novel dielectric fluids. Deviation in inner diameter, deviation in outer diameter, deviation in land and deviation in tooth width are considered to check the dimensional accuracy. Taguchi L 16 is employed for experimental design and multiple response optimization is performed using Entropy TOPSIS and Pareto ANOVA. Results indicate that pulse on time is the most notable parameter for good dimensional accuracy followed by dielectric fluid, current, pulse off time and wire tension. Ethylene glycol mixed demineralized water is preferred for low dimensional deviation. The optimum WEDM parameters are pulse on time at 20 μs, Ethylene glycol mixed demineralized water dielectric fluid, current at 3 A, pulse off time at 4 μs, and wire tension at 18 N.

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Performance and Surface Integrity of Nimonic75 Alloy Machined by Electrical Discharge Machining

Cited by 19 publications

References 6 publications

Optimization of WEDM process parameters in machining Nimonic 75 alloy using brass wire

Optimization of WEDM process parameters in machining Nimonic 75 alloy using brass wire

A review on conventional and nonconventional machining of Nickel-based Nimonic superalloy

Multiple Response Optimization of Dimensional Accuracy of Nimonic Alloy Miniature Gear Machined on Wire Edm Using Entropy Topsis Andpareto Anova

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