Purpose The purpose of this paper is to verify the effects of extrusion temperature on orthotropic behaviour of the mechanical properties of parts obtained by fused filament fabrication (FFF) under quasi-static tensile loads. Design/methodology/approach Tensile tests were performed on single layer specimens fabricated in polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS) to evaluate the mechanical properties at different extrusion temperatures and raster orientations (0°, 45° and 90°). Furthermore, a detailed study of morphological characteristics of the single layer samples cross-section and of the bonding quality among adjacent deposited filaments was performed by scanning electron microscopy to correlate the morphology of materials with mechanical behaviour. Findings The results show that the orthotropic behaviour of FFF-printed parts tends to reduce, while the mechanical properties improved with increase in extrusion temperature. Furthermore, the increase in extrusion temperature led to an improvement in inter-raster bonding quality and in the compactness and homogeneity of the parts. Originality/value The relation between the extrusion temperature, orthotropic behaviour and morphological surface characteristics of the single layer specimen obtained by FFF has not been previously reported.

Effect of extrusion temperature on fused filament fabrication parts orthotropic behaviour / Attolico, Michele Angelo; Casavola, Caterina; Cazzato, Alberto; Moramarco, Vincenzo; Renna, Gilda. - In: RAPID PROTOTYPING JOURNAL. - ISSN 1355-2546. - STAMPA. - 26:4(2020), pp. 639-647. [10.1108/RPJ-08-2019-0207]

Effect of extrusion temperature on fused filament fabrication parts orthotropic behaviour

Michele Angelo Attolico;Caterina Casavola;Alberto Cazzato;Vincenzo Moramarco
;
Gilda Renna
2020-01-01

Abstract

Purpose The purpose of this paper is to verify the effects of extrusion temperature on orthotropic behaviour of the mechanical properties of parts obtained by fused filament fabrication (FFF) under quasi-static tensile loads. Design/methodology/approach Tensile tests were performed on single layer specimens fabricated in polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS) to evaluate the mechanical properties at different extrusion temperatures and raster orientations (0°, 45° and 90°). Furthermore, a detailed study of morphological characteristics of the single layer samples cross-section and of the bonding quality among adjacent deposited filaments was performed by scanning electron microscopy to correlate the morphology of materials with mechanical behaviour. Findings The results show that the orthotropic behaviour of FFF-printed parts tends to reduce, while the mechanical properties improved with increase in extrusion temperature. Furthermore, the increase in extrusion temperature led to an improvement in inter-raster bonding quality and in the compactness and homogeneity of the parts. Originality/value The relation between the extrusion temperature, orthotropic behaviour and morphological surface characteristics of the single layer specimen obtained by FFF has not been previously reported.
2020
Effect of extrusion temperature on fused filament fabrication parts orthotropic behaviour / Attolico, Michele Angelo; Casavola, Caterina; Cazzato, Alberto; Moramarco, Vincenzo; Renna, Gilda. - In: RAPID PROTOTYPING JOURNAL. - ISSN 1355-2546. - STAMPA. - 26:4(2020), pp. 639-647. [10.1108/RPJ-08-2019-0207]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/189158
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