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Impact of processing defects on microstructure, surface quality, and tribological performance in 3D printed polymers
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement. Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, United Kingdom.ORCID-id: 0000-0002-9346-7229
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, CAS, Lanzhou, 730000, China.ORCID-id: 0000-0003-4210-840X
Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, United Kingdom.ORCID-id: 0000-0001-7139-3807
Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, United Kingdom.ORCID-id: 0000-0001-8868-2664
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2023 (Engelska)Ingår i: Journal of Materials Research and Technology, ISSN 2238-7854, Vol. 23, s. 1252-1272Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Additive manufacturing (AM), also known as three-dimensional (3D) printing, of polymer-based materials is growing as a time-efficient, economical, and environmentally sustainable technique for prototype development in load-bearing applications. This work investigates the defects arising from the processing in material extrusion-based AM of polymers and their impact on the part performance. The influence of raster angle orientation and printing speed on tribological characteristics, microstructure, and surface finish of acrylonitrile butadiene styrene (ABS) fabricated in a heated build chamber was studied. Comprehensive analysis with fractography and tomography revealed the formation, distribution, and locations of internal voids, while surface defects were studied with the topography analysis of as-printed surfaces. Surface roughness and tribological results show that printing speed can be optimally increased with a minimal impact on interlayer bonding and part performance. Increased printing speed allowed up to 58% effective reduction in printing time obtaining comparable mechanical properties at varying process parameters. 3D printed ABS exhibited dry sliding friction coefficients in the range of 0.18–0.23, whilst the maximum specific wear rate was 6.2 × 10−5 mm3/Nm. Higher surface roughness and increased printing speed exhibited delayed running-in during dry sliding, while insignificant influence was observed for steady-state friction and wear behaviors. The findings indicate that improved surface finish and reduced internal defects can be achieved with a controlled build environment allowing for higher printing speed. The observations in this study are evidence that 3D printing can be adapted for the sustainable manufacturing of polymeric components for tribological applications.

Ort, förlag, år, upplaga, sidor
Elsevier, 2023. Vol. 23, s. 1252-1272
Nyckelord [en]
3D printing, Tribology, Friction, Polymers, Porosity, Surface roughness
Nationell ämneskategori
Bearbetnings-, yt- och fogningsteknik Tribologi (ytteknik omfattande friktion, nötning och smörjning)
Forskningsämne
Maskinelement
Identifikatorer
URN: urn:nbn:se:ltu:diva-95552DOI: 10.1016/j.jmrt.2023.01.086ISI: 000964378800001Scopus ID: 2-s2.0-85149695807OAI: oai:DiVA.org:ltu-95552DiVA, id: diva2:1735231
Forskningsfinansiär
EU, Horisont 2020, 860246
Anmärkning

Validerad;2023;Nivå 2;2023-03-21 (joosat);

Licens fulltext: CC BY License

Tillgänglig från: 2023-02-08 Skapad: 2023-02-08 Senast uppdaterad: 2024-03-07Bibliografiskt granskad

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Dhakal, NayanEmami, Nazanin

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Dhakal, NayanWang, XiaolongEspejo, CayetanoMorina, ArdianEmami, Nazanin
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