Additive manufacturing of polypropylene: A screening design of experiment using laser-based powder bed fusion

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Iñigo Flores Ituarte
  • Olli Wiikinkoski
  • Anton Jansson

Organisaatiot

  • Aalborg University
  • Örebro University

Kuvaus

The use of commodity polymers such as polypropylene (PP) is key to open new market segments and applications for the additive manufacturing industry. Technologies such as powder-bed fusion (PBF) can process PP powder; however, much is still to learn concerning process parameters for reliable manufacturing. This study focusses in the process-property relationships of PP using laser-based PBF. The research presents an overview of the intrinsic and the extrinsic characteristic of a commercial PP powder as well as fabrication of tensile specimens with varying process parameters to characterize tensile, elongation at break, and porosity properties. The impact of key process parameters, such as power and scanning speed, are systematically modified in a controlled design of experiment. The results were compared to the existing body of knowledge; the outcome is to present a process window and optimal process parameters for industrial use of PP. The computer tomography data revealed a highly porous structure inside specimens ranging between 8.46% and 10.08%, with porosity concentrated in the interlayer planes in the build direction. The results of the design of experiment for this commercial material show a narrow window of 0.122 ≥ Ev ≥ 0.138 J/mm3 led to increased mechanical properties while maintaining geometrical stability.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli1293
JulkaisuPolymers
Vuosikerta10
Numero12
TilaJulkaistu - 22 marraskuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Lataa tilasto

Ei tietoja saatavilla

ID: 30313340