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Open AccessArticle

Enhancing the Surface Quality of Micro Titanium Alloy Specimen in WEDM Process by Adopting TGRA-Based Optimization

Department of Mechatronics Engineering, SRM Institute of Science and Technology, Kattankulathur 603203, India
Department of Mechanical Engineering, Saveetha Engineering College, Thandalam, Chennai 602105, India
Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi Arabia
Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
Author to whom correspondence should be addressed.
Materials 2020, 13(6), 1440;
Received: 16 February 2020 / Revised: 15 March 2020 / Accepted: 17 March 2020 / Published: 21 March 2020
(This article belongs to the Special Issue Micromanufacturing of Metallic Materials)
The surface measures of machined titanium alloys as dental materials can be enhanced by adopting a decision-making algorithm in the machining process. The surface quality is normally characterized by more than one quality parameter. Hence, it is very important to establish multi-criteria decision making to compute the optimal process factors. In the present study, Taguchi–Grey analysis-based criteria decision making has been applied to the input process factors in the wire EDM (electric discharge machining) process. The recast layer thickness, wire wear ratio and micro hardness have been chosen to evaluate the quality measures. It was found that the wire electrode selection was the most influential factor on the quality measures in the WEDM process, due to its significance in creating spark energy. The optimal arrangement of the input process parameters has been found using the proposed approach as gap voltage (70 V), discharge current (15 A) and duty factor (0.6). It was proved that the proposed method can enhance the efficacy of the process. Utilizing the computed combination of optimal process parameters in surface quality analysis has significantly contributed to improving the quality of machining surface. View Full-Text
Keywords: EDM; surface; optimization; machining; titanium EDM; surface; optimization; machining; titanium
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Thangaraj, M.; Annamalai, R.; Moiduddin, K.; Alkindi, M.; Ramalingam, S.; Alghamdi, O. Enhancing the Surface Quality of Micro Titanium Alloy Specimen in WEDM Process by Adopting TGRA-Based Optimization. Materials 2020, 13, 1440.

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