Abstract
ABSTRACT Electrical discharge turning (EDT), an unconventional machining method that utilises electrical discharges generated between an electrode and a rotating workpiece to remove material. However, it faces some challenges with numerous advantages, particularly in the effective removal of debris from the machining zone. In this context, magnetic field assistance is an emerging technique in facilitating the efficient removal of debris during the EDT process. This comparative study compares the effects of various magnetic field intensities on the electrical discharge turning (EDT) process of the Inconel-825 material, a nickel-based superalloy. The experiments were carried out on a self-developed magnetic field assisted electrical discharge turning setup. The experimental results show that increasing magnet intensity enhances the material removal rate (MRR) and improves the overcut (OC) surface finish (Ra) of the machined parts. Additionally, at higher magnetic fields intensity tool wear rate (TWR) has been reported higher. The machined surface has also been observed using SEM and found that the minimum recast layer and debris are formed on the surface at higher magnetic intensity. EDX result also confirmed that the formation of oxide and carbide on the machined surface was minimum at higher magnetic field intensity.
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