Performance evaluation of electric discharge machining of titanium alloy-a review

Abstract

Titanium alloy has a high specific resistance, excellent machining performance is non-corrosive, and the capability to withstand greater temperatures while maintaining outstanding mechanical properties. This alloy is, therefore, the right choice for aerospace, maritime, biomedical, and industrial applications. But machinability of titanium alloy is challenging as a result of its poor thermal conductivity, highly chemically reactive, and low elastic modulus hence it is treated as a difficult-to-cut material. Fast tool wear is observed during the machining of titanium alloy in conventional machining methods. Therefore, unconventional processing methods are used for the treatment of titanium alloy. Electric discharge machining (EDM) is one of these unconventional machining processes which are used for cutting with high precision, having a high degree of machinability, and getting a better surface finish. It is considered the best choice for machining titanium alloy. In the EDM process, different techniques are used to understand the effects of process parameters such as polarity, peak current, electrode type, pulse on time, and gap voltage on material removal rate, tool wear rate, surface roughness, and wear ratio. This paper critically investigates different types of EDM processes, experimental setups used for machining of titanium alloy, the effect of different tool electrodes and dielectric media on machining parameters, machined surface characteristics, and metal removal rate and tool wear rate.

Recent Research in Wire Cut Electrical Discharge Machining Process

“…When machining titanium alloy using traditional techniques, rapid tool wear is seen. [17] Jatinder Kumar et al, explained the TOPSIS: Processing and Characterizations Optimization of Wire-EDM Process Parameters for Al-Mg-0.6Si-0.35Fe/15%RHA/5%Cu Hybrid Metal Matrix Composite.In the present experimental work, the ideal wire-EDM processing factor set for a new hybrid aluminum matrix composite, Al-Mg-0.6Si-0.35Fe/15%RHA/5%Cu, is being investigated. According to normal testing procedures, the composite shows 64.2 HRB hardness, 104.6 MPa tensile strength, and 4.8 joules of impact energy.…”

Investigation of enhancing EDM machining performance of INCONEL alloy using composite electrodes

“…VIKOR, introduced by Opricovic in 1998, offers a compromise solution for multiple criteria decision-making problems by minimizing the maximum individual regret [24]. Grey Relational Analysis (GRA), on the other hand, stems from grey system theory and focuses on solving complex decision-making problems in uncertain and imprecise environments [25]. From the literature survey, it was evident that tonnes of works were performed on the EDM by varying its process parameters and tool materials.…”

Examining the surface roughness and kerf quality of micro-slots cut on the surfaces of Ti-B4C nanocomposites by WEDM: a desirability approach

“…One of the tested non-conventional machining techniques for cutting Ti components is WEDM [27]. The temperature of the spark rises between 8000 °C and 10000 °C in the regionalized zone, melting and evaporating a little amount of the substance from the work piece [28,29].…”