Mechanical properties and fracture characterization of additive manufacturing polyamide 12 after accelerated weathering

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorPuttonen, Tuomasen_US
dc.contributor.authorSalmi, Mikaen_US
dc.contributor.authorPartanen, Jounien_US
dc.contributor.departmentDepartment of Mechanical Engineeringen
dc.contributor.groupauthorAdvanced Manufacturing and Materialsen
dc.date.accessioned2021-11-01T08:37:56Z
dc.date.available2021-11-01T08:37:56Z
dc.date.issued2021-12en_US
dc.description.abstractThe additive manufacturing (AM) methods, selective laser sintering (SLS) and multi jet fusion (MJF), are increasingly used for end-use polymer parts. Chemical reactions caused by ionizing radiation and catalyzed by oxygen, moisture, and heat are known to degrade the polymer structure, result in visual defects, and loss of mechanical properties. However, the effects of the AM layer-wise manufacturing process on polymer degradation are not widely studied. Yet, they may have implications on the mechanical properties and fracture mechanisms of the components. This paper presents an open access data repository of mechanical properties after weathering for AM plastics, conventionally manufactured plastics, and for two clear protective coatings. All materials were exposed to a 1500-h accelerated weathering cycle (ISO-4982-3) followed by tensile testing (ISO-527). Special attention was given to polyamide 12 (PA12) produced via powder bed fusion AM in two build orientations. The fracture surfaces of PA12 and glass-filled PA12 were further studied with scanning electron microscopy. The AM materials were PA12, glass-filled PA12, and carbon reinforced PA12. Traditionally manufactured materials included glass-filled and molybdenum disulfide-filled PA66, PMMA, ABS, PC, and cast PA12. No clear differences were found between the AM build orientations in fracture mechanisms or weathering performance. AM and cast PA12 were strongly affected by accelerated weathering. Carbon reinforced PA12 with a UV varnish experienced the least changes. Weathering resistance was increased with protective coatings. However, an increase in the deviation of mechanical properties with the coatings was observed. The contrary results in ductility for the glass-filled and molybdenum disulfide-filled PA66 after weathering would merit further studies.en
dc.description.versionPeer revieweden
dc.format.extent14
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationPuttonen, T, Salmi, M & Partanen, J 2021, ' Mechanical properties and fracture characterization of additive manufacturing polyamide 12 after accelerated weathering ', Polymer Testing, vol. 104, 107376 . https://doi.org/10.1016/j.polymertesting.2021.107376en
dc.identifier.doi10.1016/j.polymertesting.2021.107376en_US
dc.identifier.issn0142-9418
dc.identifier.otherPURE UUID: bd445f84-f946-426f-bd1c-4ac1e1065053en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/bd445f84-f946-426f-bd1c-4ac1e1065053en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85117231363&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/69022169/1_s2.0_S0142941821003214_main.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/110741
dc.identifier.urnURN:NBN:fi:aalto-202111019916
dc.language.isoenen
dc.publisherElsevier Limited
dc.relation.ispartofseriesPolymer Testingen
dc.relation.ispartofseriesVolume 104en
dc.rightsopenAccessen
dc.subject.keywordAdditive manufacturingen_US
dc.subject.keywordpowder bed fusionen_US
dc.subject.keywordAccelerated weatheringen_US
dc.subject.keywordPolymer degradationen_US
dc.subject.keywordMechanical propertiesen_US
dc.subject.keywordFracture characterizationen_US
dc.titleMechanical properties and fracture characterization of additive manufacturing polyamide 12 after accelerated weatheringen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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