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DC Field | Value | Language |
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dc.contributor.author | Phillion, A.B. | - |
dc.contributor.author | Založnik, M. | - |
dc.contributor.author | Spindler, I. | - |
dc.contributor.author | Pinter, N. | - |
dc.contributor.author | Aledo, C.-A. | - |
dc.contributor.author | Salloum-Abou-Jaoude, G. | - |
dc.contributor.author | Nguyen Thi, H. | - |
dc.contributor.author | Reinhart, G. | - |
dc.contributor.author | Boussinot, G. | - |
dc.contributor.author | Apel, M. | - |
dc.contributor.author | Combeau, H. | - |
dc.date.accessioned | 2019-04-04T13:50:00Z | - |
dc.date.available | 2019-04-04T13:50:00Z | - |
dc.date.issued | 2017-09-01 | - |
dc.identifier | 10.1016/j.actamat.2017.09.011 | - |
dc.identifier.issn | 10.1016/j.actamat.2017.09.011 | - |
dc.identifier.uri | http://hdl.handle.net/11375/24219 | - |
dc.description.abstract | A volume average model to study the transition of a semi-solid mushy zone to a planar solid/liquid interface in a static temperature gradient is presented. This model simulates the principal phenomena governing mushy zone dynamics including solute diffusion in the interdendritic and bulk liquids, migration of both the solid-liquid interface and the mushy-liquid boundary at the bottom and top of the mushy zone, and solidification. The motion of the solid-liquid interface is determined analytically by performing a microscopic solute balance between the solid and mushy zones. The motion of the mushy-liquid boundary is more complex as it consists of a transition between the mushy and bulk liquid zones with rapidly changing macroscopic properties. In order to simulate this motion, a control volume characterized by continuity in the solute concentration and a jump in both the liquid fraction and the solute concentration gradient was developed. The volume average model has been validated by comparison against prior in-situ X-ray radiography measurements [1], and phase-field simulations [2] of the mushy-to-planar transition in an Al-Cu alloy. A very good similarity was achieved between the observed experimental and phase-field dynamics with this new model even though the described system was only one-dimensional. However, an augmentation of the solute diffusion coefficient in the bulk liquid was required in order to mimic the convective solute transport occurring in the in situ X-ray study. This new model will be useful for simulating a wide range of natural and engineering processes. | en_US |
dc.subject | Solidification | en_US |
dc.subject | Volume averaging method | en_US |
dc.subject | Phase field method | en_US |
dc.subject | Synchrotron X-ray radiography | en_US |
dc.subject | Temperature gradient zone melting | en_US |
dc.title | Evolution of a mushy zone in a static temperature gradient using a volume average approach | en_US |
dc.contributor.department | Materials Science and Engineering | en_US |
Appears in Collections: | Materials Science and Engineering Publications |
Files in This Item:
File | Description | Size | Format | |
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2017_ActaMat_StaticTempGradient.pdf | 7.62 MB | Adobe PDF | View/Open |
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