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Influence of the vapour channel on processing in laser powder bed fusion
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0003-4265-1541
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0003-0194-9018
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0002-7213-0002
Vise andre og tillknytning
2019 (engelsk)Inngår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 36, s. 80-87Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Additive Manufacturing provides many opportunities to design and manufacture parts that are difficult or not possible to produce with conventional methods. In Selective Laser Melting (SLM) in powder bed fusion (PBF), melt pool dynamics and stability is dependent on a large number of factors, e.g. laser power output, power density, travel speed, reflectivity of powder bed, rapid heating and vaporization. Since travel speeds are often very fast and the laser interaction zone is small, the physical events become difficult to predict but also to observe. This work aims to describe the formation and geometrical characteristics of the vaporization zone during processing. Using a combination of theoretical descriptions, resulting material structures and a comprehensive analysis of high-speed images of the processing zone for different heat inputs and travel speeds, explanations for the dynamic melt pool behaviour are derived. The melting and pressures from processing involved moves powder particles next to it, changing the conditions for neighbouring tracks due to lack of material. These findings can provide a basis for creating more efficient and stable SLM processing, with fewer imperfections.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 36, s. 80-87
Emneord [en]
High speed imaging, SLMPowder movement, Pressure
HSV kategori
Forskningsprogram
Produktionsutveckling
Identifikatorer
URN: urn:nbn:se:ltu:diva-75755DOI: 10.1016/j.promfg.2019.08.012ISI: 000610364700011Scopus ID: 2-s2.0-85072535737OAI: oai:DiVA.org:ltu-75755DiVA, id: diva2:1346960
Konferanse
17th Nordic Laser Materials Processing Conference (NOLAMP17), 27-29 August, 2019, Trondheim, Norway
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Tilgjengelig fra: 2019-08-29 Laget: 2019-08-29 Sist oppdatert: 2023-09-06bibliografisk kontrollert

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Frostevarg, JanVolpp, JöergPrasad, Himani SivaBrückner, Frank

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Frostevarg, JanVolpp, JöergThompson, CassidyPrasad, Himani SivaFedina, TatianaBrückner, Frank
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