Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
A Multi-scale Multi-physics Approach to Modelling of Additive Manufacturing in Nickel-based Superalloys
University of Birmingham, School of Metallurgy and Materials, UK.
University of Birmingham, School of Metallurgy and Materials, UK.
University of Birmingham, School of Metallurgy and Materials, UK.
University of Birmingham, School of Metallurgy and Materials, UK.
Visa övriga samt affilieringar
2016 (Engelska)Ingår i: Superalloys 2016: Proceedings of the 13th International Symposium on Superalloys / [ed] M. Hardy, E. Huron, U. Glatzel, B. Griffin, B. Lewis, C. Rae, V. Seetharaman och S. Tin, Minerals, Metals & Materials Society, 2016, s. 1021-1030Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

A multi-scale, multi-physics modelling framework of selective laser melting (SLM) in the nickel-based superalloy IN718 is presented. Representative powder-bed particle distribution is simulated using the measured size distribution from experiment. Thermal fluid dynamics calculations are then used to predict melting behaviour, sub-surface morphology, and porosity development during a single pass scanning of the SLM process. The results suggest that the pores and uneven surface structure are exacerbated by increasing powder layer thicknesses. Predicted porosity volume fraction is up to 12% of the single track when 5 statistical powder distributions are simulated for each powder layer thickness. Processing-induced microstructure is predicted by linking cellular automatons – finite element calculations indicate further that the cooling rate is about 4400 o C/s and grain growth strongly follows the thermal gradient giving rise to a columnar grain morphology if homogeneous nucleation is assumed. Random texture is likely for as-fabricated SLM single pass with approximately 8 Pm and 6 Pm grain size for 20 Pm and 100 Pm powder layer thickness fabrication. Use has been made of the cooling history to predict more detailed microstructure using a γ" precipitation model. With the short time scale of solidification and rapid cooling, it becomes less likely that γ" precipitation will be observed in the condition investigated unless a prolonged hold at temperature is carried out. Future work on extension of the proposed multiscale modelling approach on microstructure predictions in SLM to mechanical properties will be discussed.

Ort, förlag, år, upplaga, sidor
Minerals, Metals & Materials Society, 2016. s. 1021-1030
Nyckelord [en]
Multi-scale modelling, additive manufacturing, thermal fluid dynamics, IN718, aerospace component
Nationell ämneskategori
Bearbetnings-, yt- och fogningsteknik Metallurgi och metalliska material
Forskningsämne
TEKNIK, Produktions- och materialteknik; Produktionsteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-10412Scopus ID: 2-s2.0-85008240176ISBN: 978-1-118-99666-9 (tryckt)OAI: oai:DiVA.org:hv-10412DiVA, id: diva2:1060073
Konferens
13th International Symposium on Superalloys, Seven Springs, Pennsylvania, USA, September 11-15, 2016
Tillgänglig från: 2016-12-27 Skapad: 2016-12-27 Senast uppdaterad: 2017-01-20Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Scopus

Personposter BETA

Choquet, Isabelle

Sök vidare i DiVA

Av författaren/redaktören
Choquet, Isabelle
Av organisationen
Avdelningen för svetsteknologi (SV)
Bearbetnings-, yt- och fogningsteknikMetallurgi och metalliska material

Sök vidare utanför DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetricpoäng

isbn
urn-nbn
Totalt: 192 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf