Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing

Liu, Xiaojiang; Tey, Wei Shian; Choo, Jasper Yeng Chee; Chen, Jiayao; Tan, Pengfei; Cai, Chao; Ong, Adrian; Zhao, Lihua; Zhou, Kun

doi:10.1016/j.addma.2021.102205

Cited by 25 publications

(10 citation statements)

References 41 publications

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“…, annealing) of finished parts. Annealing MJF-printed PA-12 has been shown to increase the percentage crystallinity, which increases both the ultimate strength and stiffness of parts but decreases the elongation at break, 34 as expected for a semicrystalline polymer. However, for certain MJF-printed lattice geometries ( e.g.…”

Section: Resultsmentioning

confidence: 68%

“…Another potential method of further tuning mechanical properties that has been studied in the recent literature is the post-printing heat treatment (i.e., annealing) of finished parts. Annealing MJF-printed PA-12 has been shown to increase the percentage crystallinity, which increases both the ultimate strength and stiffness of parts but decreases the elongation at break, 34 as expected for a semicrystalline polymer. However, for certain MJF-printed lattice geometries (e.g., Kelvin cells), the embrittlement of the material after annealing can have an adverse effect on the energy absorption of the structure, due to increased crack formation and propagation through the part.…”

Section: Effect Of Build-volume Location On Mechanical Propertiesmentioning

confidence: 68%

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Multi Jet Fusion printed lattice materials: characterization and prediction of mechanical performance

Chen

Fitzhugh

et al. 2023

Mater. Adv.

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Section: Resultsmentioning

confidence: 68%

Section: Effect Of Build-volume Location On Mechanical Propertiesmentioning

confidence: 68%

Multi Jet Fusion printed lattice materials: characterization and prediction of mechanical performance

Chen

Fitzhugh

et al. 2023

Mater. Adv.

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“…The tensile strength of the UV-thermal dual-curable 3D printed material can be higher than 30 MPa by adding UDMA and maintaining elongation at a break higher than 30%. These mechanical properties are comparable to those of PA12 produced through 3D printing, 27,28 and this can greatly broaden the application fields of UV-cured materials.…”

Section: Different Ratios Of Uv Contents To Thermal Contentsmentioning

confidence: 58%

Research on mechanical properties of ink‐jet, UV‐thermal dual‐cured 3D printing materials and a comparison of the properties of ink‐jet, LCD and UV‐thermal dual‐cured 3D printing materials

Yang³

et al. 2023

Polymers for Advanced Techs

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In this work, ink‐jet 3D printing materials were developed and investigated. Additionally, a UV‐thermal dual‐curable prepolymer was synthesized and introduced into liquid crystal display (LCD) 3D printing material. Subsequently, a UV‐thermal dual‐cured 3D printing material was developed as well. The different light stabilizers, photoinitiator content and different thermal annealing time were studied to reveal these effects on the mechanical properties of the ink‐jet 3D printed samples. FTIR was used to analyze the deblocking effect of blocked isocyanate in the synthesized resin. The mechanical properties of the UV‐thermal dual‐cured materials at different thermal annealing time and different ratios of UV content to thermal content were discussed. Scanning electron microscopy (SEM) was utilized to reveal the microscopic morphology of UV‐thermal dual‐cured material before and after thermal annealing. Finally, the dissipated energies of different 3D printing materials were revealed to indicate the difference in internal structure between ink‐jet, LCD and UV‐thermal dual‐cured 3D printing materials.

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“…This increase follows the sequence XY < XZ < ZX (Figure 6b and Table 3), similar to what was observed in early works on neat PA12. [ 15,48 ] The elongation at break does not significantly change among the three orientations in MJF parts (Table 3). This is coherent with the data reported in refs.…”

Section: Resultsmentioning

confidence: 94%

“…Similar values were reported in several studies for GF-reinforced SLS and MJF parts. [45][46][47][48][49] MJF technique typically exhibits lower densities compared to SLS (Table 2). This is likely due to the evaporation of the aqueous solvent of the printing agents deposited during the fabrication process.…”

Section: Porositymentioning

confidence: 99%

Selective Laser Sintering versus Multi Jet Fusion: A Comprehensive Comparison Study Based on the Properties of Glass Beads‐Reinforced Polyamide 12

Lupone,

Padovano,

Lambertini

et al. 2024

Adv Eng Mater

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Selective Laser Sintering (SLS) and Multi Jet Fusion (MJF) are the most widespread powder bed fusion additive manufacturing techniques for fabricating polymeric parts since they offer great design flexibility, productivity and geometrical accuracy. However, these technologies differ for the thermal energy source used to melt the powders as well as the innovative use of printing agents featured in the latter one to promote material consolidation and to avoid thermal bleeding at the part contours. The use of a single powder made of glass beads reinforced polyamide 12 (PA12/GB) for the fabrication of MJF and SLS samples makes possible a systematic comparison of the printed parts properties. A thoughtful analysis of the microstructure and mechanical properties of the samples revealed differences and peculiarities between the two technologies. SLS exhibited lower porosity and higher mechanical performances when the parts are printed along the build plane thanks to the powerful heating ensured by the laser. On the other hand, MJF samples show higher mechanical isotropy with great flexural and tensile behavior for vertically oriented parts. The role of glass beads in the material behaviour is defined by its mechanical properties, meaning higher rigidity and lower strength compared to neat PA12, and fracture mechanism.This article is protected by copyright. All rights reserved.

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Enhancing the mechanical strength of Multi Jet Fusion–printed polyamide 12 and its glass fiber-reinforced composite via high-temperature annealing

Cited by 25 publications

References 41 publications

Multi Jet Fusion printed lattice materials: characterization and prediction of mechanical performance

Multi Jet Fusion printed lattice materials: characterization and prediction of mechanical performance

Research on mechanical properties of ink‐jet, UV‐thermal dual‐cured 3D printing materials and a comparison of the properties of ink‐jet, LCD and UV‐thermal dual‐cured 3D printing materials

Selective Laser Sintering versus Multi Jet Fusion: A Comprehensive Comparison Study Based on the Properties of Glass Beads‐Reinforced Polyamide 12

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