Kerf-width optimization and surface characterization of wire electric discharge machined Ti-6Al-4V using response surface method

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Published: Jun 27, 2023
DOI: https://doi.org/10.14456/apst.2023.51
Keywords:
Ti-6Al-4V Kerf width Wire-EDM Pulse-on time Pulse-off time Peak current

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Deepak Doreswamy
Department of Mechatronics, Manipal Institute of Technology, Manipal Academy of Higher Education, Karnataka, India
Sai D. Shreyas
Department of Mechatronics, Manipal Institute of Technology, Manipal Academy of Higher Education, Karnataka, India
Satheesh Javaregowda
Department of Mechanical Engineering, SJB Institute of Technology, Bangalore, India
Anjaiah Devineni
Department of Automobile Engineering, School of Automobile, Mechanical & Mechatronics Engineering, Manipal University, Jaipur, India
Subraya K. Bhat
Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Karnataka, India

Abstract

Wire-Electric Discharge Machining (WEDM) is one of practicable advanced machining techniques for machining of hard materials such as Titanium alloys precisely. It is critical to optimize the settings for control parameters to achieve the desired levels of kerf width and dimensional tolerance. Considering this objective, this research investigates the effects of current, pulse on time (Ton) and pulse off time (Toff) on kerf width of Wire-Electric Discharge (WED) machined Ti-6Al-4V Titanium alloy. The study showed that, increase in current from 2 A to 6 A resulted in increase of kerf width by 9.34% and 12.62%, respectively. But increase of Toff from 20 μs to 30 μs led to a sharp reduction in kerf width by about 6.14%. Further, a regression model is developed to predict the surface roughness with coefficient of determination (R2) =90.11%. The machined surfaces are characterised by the presence of voids and microcracks on the recast layers, formation of micro-globules, ridges and craters due to thermal effects. Within the range of study Toff showed significantly larger influence in minimizing the kerf width compared to other parameters of the study.

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How to Cite
Doreswamy, D., Shreyas, S. D., Javaregowda, S., Devineni, A., & Bhat, S. K. (2023). Kerf-width optimization and surface characterization of wire electric discharge machined Ti-6Al-4V using response surface method. Asia-Pacific Journal of Science and Technology, 28(03), APST–28. https://doi.org/10.14456/apst.2023.51
Issue
Vol. 28 No. 03 (2023): MAY-JUNE
Section
Research Articles
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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