Multi-objective decision making in EDM using AlCrNi coated aluminum electrode: topsis approach
Year: 2025
Type: article
Abstract: It is very important to find the optimal set of technological parameters in traditional or non-traditional machining technology. It has special practical significance for multiobjective problems. In micro-EDM, the complexity of the number and range of changes of the technological parameters, and the mechanism of spark formation are precisely controlled. The influence of interference factors includes the uniformity of the dielectric solution, the chip particles existing in the discharge gap, the conductivity of the electrode, etc. This has led to the need of optimizing the technological parameters in micro-EDM. The method of determining the optimal set of parameters was different, and the optimal results of each different method were also different. This has led to a decrease in the reliability of the optimal results. Therefore, it is necessary to study and evaluate the suitability of each method in each specific technical problem. Electrical discharge machining (EDM) using coated electrodes has piqued the interest of many technical specialists owing to its efficacy in enhancing the machining process. However, there have been relatively few studies on improving technical parameters in EDM with coated electrodes, resulting in a major drop in productivity and quality in reality. In this research, the adjustment technology parameters are improved in the multi-objective choice problem in EDM technology utilizing AlCrNi (Aluminum-Chromium-Nickel) coated electrodes. The AlCrNi alloy layer was coated with an aluminum (Al) base electrode, whereas the workpiece was made of titanium alloy (Ti-6Al-4V). The voltage (U), current (I) and pulse on time (Ton) were considered the technological parameters. The material removal rate (MRR) and surface roughness (SR) are employed in this investigation. The Taguchi-Topsis approach is used to address the multi-objective decision issue. The ideal process parameters are U=50 V, I=20 A, Ton=1000 µs, MRR=0.0151 mg/min, and SR=7.215 µm. Combining Taguchi and Topsis is a multi-objective decision-making approach that improves economic and technological efficiency
Source: EUREKA Physics and Engineering
Author: Thanh Thi Phuong Le
Institution: Hanoi University of Industry
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $161
OpenAlex ID: W4409044757