Abstract
AbstractFused deposition modeling (FDM) process is a low cost and widely used extrusion-based additive manufacturing (AM) process. FDM is generally used for printing thermoplastic materials like PLA, ABS, etc. This present study aims to extend the application of the FDM technique for printing low-melting point (LMP) alloys. The melt flow behavior (MFB) of molten material through liquefier plays a vital role in the deposition characteristic and calculation of feeding force or torque. This present study analyzes the melt flow behavior of eutectic Sn-Bi LMP alloy through the nozzle. The MFB parameters, i.e., pressure drop and melt flow velocity across the nozzle have been investigated. This study has been carried out using two methods: one analytical method and the other finite element analysis (FEA). The investigation has been carried out with varying nozzle angles and nozzle exit diameters. The results show that nozzle geometry has a significant impact on the MFB. Both pressure drop across the nozzle and nozzle exit velocity decreases with increase in nozzle angle and nozzle exit diameter resulting in a smooth flow.KeywordsFused deposition modeling (FDM)Melt flow behavior (MFB)Low-melting point alloy (LMP)Eutectic Sn–Bi alloy
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