Abstract
To obtain the deeper knowledge about the mechanical behaviour of 3D printed polymeric materials it is necessary to study the material properties from the beginning to the end. The commonly processed polymeric materials (via injection moulding etc.) are already deeply studied and evaluated, but 3D printed specimens in the various orientation build are not yet. In this study the tensile impact test specimens were fabricated via a desktop material extrusion 3D printer Zortrax M200 processing ABS and HIPS in build orientation XY. The 3D printed tensile impact test specimens were examined to compare the effect of layer thickness. Impact pendulum Zwick HIT50P was used for tensile impact tests according to ISO 8256 standard. Optical microscopy was utilized to perform fractography on impact test specimens to explore the effect of the layer thickness on the fracture surface morphology of the failed specimens. This study demonstrates the need for material testing for specific processing as additive manufacturing technologies.
Highlights
Fused deposition modelling (FDM) is a manufacturing process using which a prototype or model is produced
In this study the tensile impact test specimens were fabricated via a desktop material extrusion 3D printer Zortrax M200 processing ABS and HIPS in build orientation XY
For production of the tested samples a desktop grade fused filament fabrication (FFF)/FDM (Fused Filament Fabrication/Fused Deposition Modeling) 3D printer Zortrax M200 was fed with ABS and HIPS filaments with a specified diameter of 1.75 mm supplied by Zortrax company to fabricate specimens for tensile-impact testing type T2 according to the dimensions described in the ISO 8256 standard
Summary
Fused deposition modelling (FDM) is a manufacturing process using which a prototype or model is produced. FDM was invented by Crump in later 1980s and was commercialized since 1990 Another nomenclature of this process is fused filament fabrication (FFF) or plastic jet printing (PJP). To produce the product of the best quality, the print orientation and the layer thickness are important for the improvement of the bonding strength of FDM products. From the adhesion point of view, the edgewise orientation had the highest adhesion strength in lower layer thicknesses. Blevins and Bowman investigated 3D printed specimens from ABS plus-P430 in three different build orientation and these specimens were subjected to the tensile test. Morovič and Blaha used in their experiment the same 3D print as in our case In their case they printed the upper teeth model with the different layer thickness. Measurement of layer thickness was measured by optical microscope Zeiss Axio Scope A1 and subsequently photographed for easier evaluation of the results
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