The enhancement in process parameters of fused deposition modelling used for 3D printed components from the perspective of enhancement of mechanical strength properties: A narrative review.

Fused Deposition Modelling (FDM), also known as Fused Filament Fabrication (FFF), can be called a primary additive manufacturing technology used for rapid prototyping of items with complex geometry. However, these techniques have limitations, including poor dimensional precision and insufficient mechanical characteristics. Several studies have shown that such process factors significantly impact the manufactured product quality. Considering this, a thorough evaluation of the impact of process variables such as, nozzle diameter, extrusion temperature, layer thickness, infill density, raster angle, build orientation and infill patterns on mechanical characteristics was conducted. The literature review indicates layer thickness is one of the crucial factors compared to other parameters. Studies also reveal that the mechanical characteristics and the quality of 3D printed parts have a significant impact due to adjustments in FDM process settings. It is also found that achieving an ideal combination of process parameters is quite challenging. Therefore, in this study, an evaluation of the impact of pre-processing of 3D printed parts on part strength enhancement is also included. [ABSTRACT FROM AUTHOR]