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2019 | OriginalPaper | Buchkapitel

Numerical Investigation on the Motion of Free-Floating Crystals During DC Casting of Aluminum Alloys

verfasst von : Qipeng Dong, Hiromi Nagaumi, Haitao Zhang, Tianpeng Qu, Jingkun Wang

Erschienen in: Light Metals 2019

Verlag: Springer International Publishing

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Abstract

Macrosegregation formed during direct chill (DC) casting of aluminum ingots will deteriorate the mechanical property of products. The characteristic of macrosegregation is reported to be affected by the free-floating crystals, which was proved to result in the center negative segregation. The motion of free-floating crystals in ingots is numerically simulated. The model is developed to incorporate fluid flow, heat transfer, and the motion of free-floating crystals basing on the mixture model and Lagrangian approach. Efforts are made to investigate the motion of free-floating crystals in liquid and slurry zones during solidification of casting process. In addition, distribution of the dendrites in mush and solidified zones is also studied. The variation of macrosegregation with the influence of free-floating crystals can be primarily clarified according to the results.

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Titel: Numerical Investigation on the Motion of Free-Floating Crystals During DC Casting of Aluminum Alloys
verfasst von: Qipeng Dong
Hiromi Nagaumi
Haitao Zhang
Tianpeng Qu
Jingkun Wang
Verlag: Springer International Publishing
Buch: Light Metals 2019
Print ISBN: 978-3-030-05863-0

Electronic ISBN: 978-3-030-05864-7

Copyright-Jahr: 2019
DOI: https://doi.org/10.1007/978-3-030-05864-7_38

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