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Effect of partition coefficient on microsegregation during solidification of aluminium alloys
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Metallernas gjutning.
2014 (Engelska)Ingår i: International Journal of Minerals, Metallurgy and Materials, ISSN 1674-4799, E-ISSN 1869-103X, Vol. 21, nr 10, s. 980-989Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In the modeling of microsegregation, the partition coefficient is usually calculated using data from the equilibrium phase diagrams. The aim of this study was to experimentally and theoretically analyze the partition coefficient in binary aluminum-copper alloys. The samples were analyzed by differential thermal analysis (DTA), which were melted and quenched from different temperatures during solidification. The mass fraction and composition of phases were measured by image processing and scanning electron microscopy (SEM) equipped with an energy-dispersive X-ray spectroscopy (EDS) unit. These data were used to calculate as the experimental partition coefficients with four different methods. The experimental and equilibrium partition coefficients were used to model the concentration profile in the primary phase. The modeling results show that the profiles calculated by the experimental partition coefficients are more consistent with the experimental profiles, compared to those calculated using the equilibrium partition coefficients.

Ort, förlag, år, upplaga, sidor
2014. Vol. 21, nr 10, s. 980-989
Nyckelord [en]
aluminum copper alloys, solidification, partition coefficient, microsegregation, numerical modeling, differential thermal analysis
Nationell ämneskategori
Metallurgi och metalliska material
Identifikatorer
URN: urn:nbn:se:kth:diva-155789DOI: 10.1007/s12613-014-0999-1ISI: 000343161500006Scopus ID: 2-s2.0-84919662420OAI: oai:DiVA.org:kth-155789DiVA, id: diva2:763458
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QC 20141114

Tillgänglig från: 2014-11-14 Skapad: 2014-11-13 Senast uppdaterad: 2017-12-05Bibliografiskt granskad

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Fredriksson, Hasse
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Metallernas gjutning
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International Journal of Minerals, Metallurgy and Materials
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