ISSN: 1985-3157 Vol. 12 No. 1 January - June 2018 Parametric Study on Parameter Efects in Hybrid Micro Wire Electrical Discharge Turning 1 PARAMETRIC STUDY ON PARAMETER EFFECTS IN HYBRID MICRO WIRE ELECTRICAL DISCHARGE TURNING R. Izamshah, M. Akmal, M.S. Kasim, M.K. Sued, S.A. Sundi and M. Amran Precision Machining Group, Faculty of Manufacturing Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia. Corresponding Author’s Email: izamshah@utem.edu.my Article History: Received 28 April 2017; Revised 23 August 2017; Accepted 7 February 2018 ABSTRACT: In this work, a comprehensive parametric study on the efects of operating parameters in wire electrical discharge turning (WEDT) process was conducted. A total of eleven operating parameters were considered against the machined surface quality. The research focuses on the micro- turning of Ti6Al4V materials using Taguchi’s L12 orthogonal array at two- level experimental designs. Analysis of variance (ANOVA) and signal-to-noise (S/N) ratio were used as statistical tools to evaluate the signifcance of the parameters. It was found that among the eleven operating parameters, only four parameters dominated and had statistical signifcant efects on the surface roughness values as discovered by ANOVA. The operating parameters were the rotational spindle speed (28.34%) as the most dominating factor, followed by intensity of pulse (24.18%), wire tension (20.57%) and stabilizer E (11.97%). KEYWORDS: WEDT; Operating Parameters; Taguchi; Ti6Al4V; Surface Roughness 1.0 INTRODUCTION Wire electrical discharge turning (WEDT) is a non-conventional machining process which evolved from the basis of wire electrical discharge machining (WEDM) a few decades ago. It was introduced by Qu [1] to countermeasure the issues in turning raw form of difcult- to-machine materials into profle form shapes. Turning of the low machinability materials such as titanium and its alloy by conventional process created difculties, and for that reason development in this area has seen steady growth [2- 3]. A free cuting force process such as electrical discharge based machining combining with the rotating workpiece could be a suitable candidate [4]. Presently, WEDT has been given considerable atention owing to the rapid innovation in