Abstract
ABSTRACT Nickel and titanium (NiTi) based shape memory alloys (SMAs) are novel materials endowed with exceptional super-elasticity, corrosion resistance, and shape memory capabilities, making them well-suited for biomedical and industrial applications. The current study explores the impact of process parameters in powder mixed micro-electrical discharge milling (µ-EDM) on NiTi SMA, focusing on pulse on time (TON), voltage, pulse off time (TOFF), and RPM individually, employing a one factor at a time (OFAT) methodology to analyze surface characteristics, surface roughness (Ra), and material removal rate (MRR). The impact of black phosphorus powder combined with sesame oil (dielectric) on the surface of fabricated channels in commonly used biomaterials was investigated. The cytotoxicity test for biocompatibility was carried out to enhance the cell viability up to 79.89% after machining, which showed enhanced cell viability. The highest MRR the lowest Ra were obtained at the best input factors combination of 24 µs (TON), 6 µs (TOFF), 240 V, and 50 RPM tool rotation. Improved micro-channel quality was observed with lower TON, voltage, and RPM.
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