Abstract
In the present research work, an attempt has been made to enhance the surface integrity (roughness and microhardness) of β-Phase Titanium Alloy using ball burnishing assisted electrical discharge cladding (BB-EDC) process. The effect of BB-EDC process parameters such as peak-current, pulse-duration, and supply-voltage on the surface roughness has been studied. For experimentation, a BB-EDC experimental set-up has been fabricated in-house on the Sparkonix die-sinking EDM machine. The experimentation has been performed according to a mixed-mode L-18 orthogonal array. The roughness was measured using a surface profilometer. The surface hardness was measured using Vicker’s microhardness tester. It has been observed that BB-EDC reduced surface roughness significantly and highest contributing factor. FE-SEM morphology investigation revealed that BB-EDC removed the surface irregularities and flat the surface, thus surface roughness decreased and finishing improved. Moreover, BB-EDC improved the surface hardness owing to comprise force generated by hard-ceramic balls. At optimized conditions, the minimum surface roughness and micro-hardness were measured around 0.61 µm and 848 HV, respectively. The obtained results show that the BB-EDC treated surface can be used for biomedical implant applications.
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