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Tribological Performance of Additive Manufactured PLA-Based Parts.

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Adding metal particles like copper and aluminum to polylactic acid (PLA) improves 3D printed part durability. Reinforced PLA shows reduced wear and stable performance, despite increased friction and surface roughness.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Additive Manufacturing

Background:

  • Additive manufacturing (AM) is evolving from prototyping to producing functional parts.
  • Challenges in AM include surface finish and wear resistance, limiting applications.
  • Metallic reinforcements in polymers offer potential for enhanced material properties.

Purpose of the Study:

  • To investigate the tribological behavior of polymer composites for additive manufacturing.
  • To evaluate the effect of copper and aluminum reinforcement in a polylactic acid matrix.
  • To analyze friction and wear characteristics of 3D printed reinforced polymers.

Main Methods:

  • Fused Filament Fabrication (FFF) was used to create reinforced polylactic acid (PLA) parts.
  • Pin-on-disc tests were performed to measure friction coefficients and wear rates.
  • Statistical analysis was employed to correlate process variables and material properties.

Main Results:

  • Reinforced PLA parts exhibited over 300% increase in surface roughness.
  • Material hardness increased by over 75% for aluminum-reinforced PLA.
  • Friction coefficient increased, but wear volume was reduced by 50%.

Conclusions:

  • Metallic reinforcement in PLA enhances mechanical properties and wear resistance for 3D printed components.
  • Despite increased roughness and friction, reinforced polymers demonstrate improved durability.
  • These findings support the use of reinforced polymers in demanding industrial applications requiring robust parts.