Multi-objective Optimization of EDM Process on ZE41 Magnesium Alloy with Copper, Brass and EN8 Electrodes Using AHP-TOPSIS Method

DOI

10.2991/978-94-6463-252-1_104How to use a DOI?

Keywords

Electrical discharge machining; Magnesium alloy ZE41; AHP-TOPSIS method

Abstract

ZE41 Magnesium (Mg) alloys are widely employed in the automotive and aerospace industries because of their advantageous qualities like lightest structural metal, corrosion resistant and better mechanical properties. Since it is highly cumbersome to machine this alloy of complex shapes using conventional machining processes, it can be machined by unconventional machining process i.e. EDM process. It employs electro-thermal energy to remove the material and there is no contact between material and electrode. In the present study, three electrodes such as copper, brass and EN8 were utilized because they have dominant effect on machining performance. An effort was made to carry out multi-objective optimization of various objectives viz. Metal removal rate, surface roughness and radial overcut considering the input parameters like type of electrode, peak current, pulse on time and pulse off time. Experiment were conducted based on Taguchi’s L₂₇ orthogonal array. Analytical hierarchy process coupled with TOPSIS is used for multi-objective optimization and derive better process parameters. The results indicated that the best solution obtained by proposed method corresponds to brass electrode, peak current of 18A, pulse on time of 100 (μs) and pulse of time of 100 (μs) and the worst solution corresponds to copper electrode, peak current of 6A, pulse on time of 500 (μs) and pulse of time of 100 (μs). The metal removal rate, surface roughness and radial overcut corresponding to best solution are 282.075mg/min, 6.031μm and 0.122mm respectively.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - U. Shrinivas Balraj
AU  - J. Sunny
AU  - C. Rajeev
AU  - K. Pavankrishna
AU  - B. Chanakya
PY  - 2023
DA  - 2023/11/09
TI  - Multi-objective Optimization of EDM Process on ZE41 Magnesium Alloy with Copper, Brass and EN8 Electrodes Using AHP-TOPSIS Method
BT  - Proceedings of the Second International Conference on Emerging Trends in Engineering (ICETE 2023)
PB  - Atlantis Press
SP  - 1031
EP  - 1040
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-252-1_104
DO  - 10.2991/978-94-6463-252-1_104
ID  - ShrinivasBalraj2023
ER  -