Abstract
This article highlights the application of multiple criteria optimization using the Grey relation analysis (GRA) and Weightage principal component analysis (WPCA) method in EDM of Inconel X-750. Taguchi’s based design of experiment L9 orthogonal array (OA) was used to perform machining operations using a copper tool. When machining comes to accuracy, higher dimensional tolerances, extreme surface finish, cutting of hard materials, there is an extreme need for non-traditional techniques like EDM. The effects of process parameter namely, peak current (\(I_{\text{p}}\)), pulse on time (\(T_{\text{on}}\)), pulse off time (\(T_{\text{off}}\)) and voltage (V) on Material removal rate (MRR) and Surface roughness (Ra) has been studied. The optimal parametric setting obtained from WPCA and GRA approach are found as 15 amp, 74 µs, 8 µs, 40 voltage, and 18 amp, 63 µs, 9 µs, 60 voltages, respectively. Outcomes of confirmatory tests show that WPCA gives better agreement with actual results which is highly desired for an efficient machining environment. Also, a comparative study of both the developed hybrid modules was performed to evaluate the feasibility. Outcomes reveal that WPCA improved the preferred solution value by 12.67%. The result of ANOVA confirms the most influencing parameter on machining performances.
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Abbreviations
- GRA:
-
Grey relation analysis
- GRC:
-
Grey relation coefficient
- GRG:
-
Grey relation grade
- MRR:
-
Material removal rate
- Ra:
-
Surface roughness
- ANOVA:
-
Analysis of variance
- MPI:
-
Multi-performance index
- OA:
-
Orthogonal array
- Min:
-
Minute
- mm:
-
Milli meter
- Nm:
-
Newton meter
- N:
-
Newton
- LB:
-
Lower is better
- HB:
-
Higher is better
- S/N:
-
Single to noise
- N:
-
Normalize
- PCA:
-
Principal component analysis
- TOPSIS:
-
Techniques for order of preference by similarity to ideal solution
- VIKOR:
-
Vlse Kriterijumska Optimizacija Kompromisno Resenje
- RSM:
-
Response surface methodology
- NSGA-II:
-
Nondominated sorting genetic algorithm-II
- AHP:
-
Analytic hierarchy process
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Acknowledgements
The authors are very grateful to the Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology Gorakhpur, India for extending all possible help in carrying out this research work directly or indirectly.
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Pratap, P., Kumar, J. & Verma, R.K. Experimental investigation and optimization of process parameters during electric discharge machining of Inconel X-750. Multiscale and Multidiscip. Model. Exp. and Des. 3, 161–171 (2020). https://doi.org/10.1007/s41939-020-00069-z
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DOI: https://doi.org/10.1007/s41939-020-00069-z