Abstract:

In this study, the machining performance of the electrode material used in the Electro Discharge Machining (EDM) of Ti-6Al-4V alloy was investigated as a result of cryogenic treatment. Within the scope of the study, electrodes selected from brass material were subjected to cryogenic treatment with a cycle between [Room temperature / -184°C / Room temperature]. In the experiments, the most effective process parameters such as discharge current (Ip), pulse on time (Ton), pulse off time (Toff) and gap voltage (Vg) were selected as variables with brass and cryogenic brass electrodes. As a result of the experiments, the re-solidified layer thickness, material removal rate and taper angle, which determine the product quality, were measured and evaluated. As a result of the cryogenic treatment applied to the electrodes, it was found that positive improvements in EEI performance were obtained. It was concluded that re-solidified layer thickness, material removal rate, tool wear rate and bevel amount ratios are positively affected by discharge current, gap voltage and pulse on time and negatively affected by pulse off time.

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