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Fused Filament Fabrication FFF of Metal-Ceramic Components
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Interface Healing Between Adjacent Tracks in Fused Filament Fabrication Using In-Process Laser Heating.

Pu Han1, Alireza Tofangchi2, Sihan Zhang2

  • 1Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, Arizona, USA.

3D Printing and Additive Manufacturing
|August 23, 2023
PubMed
Summary
This summary is machine-generated.

Fused filament fabrication (FFF) parts can be strengthened by using in-process laser heating to improve adhesion between deposited tracks. This method enhances the mechanical properties of 3D printed objects, overcoming inherent anisotropy.

Keywords:
PLAadditive manufacturingfused filament fabricationintertrack adhesionlaser heating processthermal diffusion

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Polymer Science

Background:

  • Fused filament fabrication (FFF) is a popular additive manufacturing technique for creating complex thermoplastic parts.
  • A key limitation of FFF is the anisotropic mechanical properties of printed parts due to track-based deposition.
  • Poor interface adhesion between adjacent deposited tracks leads to anisotropic behavior and reduced mechanical strength.

Purpose of the Study:

  • To introduce and evaluate an in-process laser heating method for improving interface adhesion in FFF parts.
  • To enhance the bonding strength between adjacent deposited tracks.
  • To mitigate the anisotropic mechanical properties of FFF-fabricated components.

Main Methods:

  • An in-process laser heating technique was applied during the FFF process.
  • Laser heating increased the interface temperature between adjacent deposited tracks.
  • Polymer reptation and bonding at the interface were promoted by the elevated temperature.

Main Results:

  • Laser heating significantly improved the flexural strength between adjacent tracks within the same layer.
  • The enhanced flexural strength exceeded that of control samples tested along the track direction.
  • Load-displacement curves and fractured surface morphology analysis confirmed the effectiveness of laser-induced interface healing.

Conclusions:

  • In-process laser heating is an effective method for healing interface adhesion in FFF.
  • This technique successfully enhances the bonding strength and mechanical properties of 3D printed parts.
  • The study demonstrates a viable approach to overcome FFF's inherent anisotropy.