An approach to improve interface healing in FFF-3D printed Ultem 1010 using laser pre-deposition heating

Han, Pu; Tofangchi, Alireza; Deshpande, Anagh; Zhang, Sihan; Hsu, Kuo Chin

doi:10.1016/j.promfg.2019.06.195

Cited by 41 publications

(22 citation statements)

References 36 publications

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“…Increasing the build environment temperature will directly increase the inter-layer bond strength of the filament. However, the ramification of such action will prove to be detrimental to the structural accuracy and part dimension of the part [6].…”

Section: In-process Laser Heatingmentioning

confidence: 99%

“…After reviewing the relevant literature, mainly [6,7], it was concluded that t perature of the critical interface must not only be reached but also maintained for a time duration in order to obtain adequate bond formation between the previously ited layer and the next filament layer being extruded onto it. The critical interface t ature must be maintained in order to allow the three stages of bonding formatio there is wetting, followed by diffusion, and finally randomization [7].…”

Section: In-process Laser Heatingmentioning

confidence: 99%

“…It is apparent that the strength in inter-layer bonding resulted from the increased temperature as it promoted time-dependent relaxation of the polymer. The obtained results which were reviewed from the literature show that laser pre-deposition heating is a feasible method to improve the isotropy of the FFF 3D printed part [6].…”

Section: In-process Laser Heatingmentioning

confidence: 99%

Section: Laser Assisted Fff 3d Printingmentioning

confidence: 99%

“…Figure 17 shows surface fractures due to the laser pre-deposition heating. These tears on the surface fracture indicate that the inter-layer interfaces within the part have been eliminated and hence, a stronger inter-layer bond is expected [6,24]. The visual quality of the laser assisted FFF 3D printed tensile specimens left a lot to be desired as there were plenty of evident printing defects.…”

Section: Laser Assisted Fff 3d Printingmentioning

confidence: 99%

See 4 more Smart Citations

Filament Development for Laser Assisted FFF 3D Printing

Borg

Kiss

Rochman

2021

JMMP

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The aim of this paper was to develop filaments which can be used for laser assisted fused filament fabrication (FFF) 3D printing in order to increase the inter-layer bonding strength of the printed part. The filaments were developed from the most commonly used filament materials, acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA) with the addition of different polymer additives. After performing near infrared (NIR) absorption tests, graphite was selected for further development as it possesses excellent NIR absorption capabilities whilst resulting in consistent filaments’ diameter and being economically viable. A conventional FFF 3D printer was initially used to test the printability of the developed filaments. Afterwards, a fiber couple laser diode was integrated within the printing head to heat up the previously extruded layer. The produced filaments were used to 3D print specimens for shear and tensile testing. With the laser heating, an increase of 14.5% in the elastic modulus and an increase of 27.8% in the tensile strength of the printed parts were noticed. This showed that adding additives into filament materials for localized laser heating is an effective method of increasing the inter-layer bonding, and therefore, the overall strength and durability of FFF 3D printed parts.

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Section: In-process Laser Heatingmentioning

confidence: 99%

Section: In-process Laser Heatingmentioning

confidence: 99%

Section: In-process Laser Heatingmentioning

confidence: 99%

Section: Laser Assisted Fff 3d Printingmentioning

confidence: 99%

Section: Laser Assisted Fff 3d Printingmentioning

confidence: 99%

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Filament Development for Laser Assisted FFF 3D Printing

Borg

Kiss

Rochman

2021

JMMP

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Polymeric Materials for Additive Manufacturing

Weyhrich

Scott

Williams

et al. 2022

Macromolecular Engineering

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Additive manufacturing (AM), also known as 3D printing, is a promising technology to produce complex shapes with little waste material in a distributed fashion. AM can be implemented with various materials, but metal and polymer are dominant feedstocks. During the deposition process for polymeric AM, the polymer may encounter repetitive softening or melting, applied shear flow including multiple constrictions, cooling and solidification, solvent evaporation, polymerization and crosslinking, or coalescence across interfaces. This leads to the need to invoke polymer science principles to rationally predict the response of the polymeric feedstock to the shear fields, thermal gradients, and reaction fronts that they will encounter in the complex 3D printing process. Elucidating the fate of the macromolecules as they experience the 3D printing process provides a foundation to design new materials that are formulated to bias the formation of robust structures and interfaces. As such, polymers in AM offer a unique opportunity to apply polymer science principles to address shortcomings, offer potential solutions, and advance the technology. This article provides a focused discussion of how polymer science principles drive the growth of three common polymeric AM techniques, fused filament fabrication, direct‐ink write, and vat polymerization.

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Investigating the effect of printing conditions and annealing on the porosity and tensile behavior of 3D‐printed polyetherimide material in Z‐direction

Ouassil

Magri

Vanaei

et al. 2022

J of Applied Polymer Sci

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Fused filament fabrication process presents drawbacks in mechanical properties observed when printing in the build direction (Z‐direction). Such anisotropic properties will affect the part's performances and have to be minimized during fabrication. This study aims to evaluate the effects of nozzle temperature, printing speed and specimen state (annealed or as‐printed) on porosity percentage and tensile properties for 3D printed polyetherimide (PEI) (ULTEM 1010) parts in Z‐direction. The results demonstrated that print speed is the most influential process parameter that should be adjusted in consideration with the other printing parameters. The specimens' state did not reveal a noticeable influence, as the amorphous nature of PEI is considered less receptive to annealing. The optimization method to achieve the best results yielded values of 360°C and 30 mm s−1 as printing conditions, followed by heat treatment. This was confirmed by porosity measurements, tensile testing, and scanning electron microscopy observations. The best performances of PEI material were 3425.5 MPa, 102 MPa, and 4.30% for Young's modulus, tensile strength, and elongation at break, respectively.

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An approach to improve interface healing in FFF-3D printed Ultem 1010 using laser pre-deposition heating

Cited by 41 publications

References 36 publications

Filament Development for Laser Assisted FFF 3D Printing

Filament Development for Laser Assisted FFF 3D Printing

Polymeric Materials for Additive Manufacturing

Investigating the effect of printing conditions and annealing on the porosity and tensile behavior of 3D‐printed polyetherimide material in Z‐direction

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