Materials, 2021-01, Vol.14 (3), p.520
2021
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- Autor(en) / Beteiligte
- Titel
- 3D Phase Field Modeling of Multi-Dendrites Evolution in Solidification and Validation by Synchrotron X-ray Tomography
- Ist Teil von
- Materials, 2021-01, Vol.14 (3), p.520
- Ort / Verlag
- Switzerland: MDPI AG
- Erscheinungsjahr
- 2021
- Quelle
- Free E-Journal (出版社公開部分のみ）
- Beschreibungen/Notizen
- In this paper, the dynamics of multi-dendrite concurrent growth and coarsening of an Al-15 .% Cu alloy was studied using a highly computationally efficient 3D phase field model and real-time synchrotron X-ray micro-tomography. High fidelity multi-dendrite simulations were achieved and the results were compared directly with the time-evolved tomography datasets to quantify the relative importance of multi-dendritic growth and coarsening. Coarsening mechanisms under different solidification conditions were further elucidated. The dominant coarsening mechanisms change from small arm melting and interdendritic groove advancement to coalescence when the solid volume fraction approaches ~0.70. Both tomography experiments and phase field simulations indicated that multi-dendrite coarsening obeys the classical Lifshitz-Slyozov-Wagner theory Rn-R0n = kc(t-t0), but with a higher constant of = 4.3.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1996-1944eISSN: 1996-1944DOI: 10.3390/ma14030520Titel-ID: cdi_doaj_primary_oai_doaj_org_article_72fcf56b86e84be6a2bf4954bb154a4e
- Format
- –
- Schlagworte
- Algorithms, Behavior, Coalescing, Copper, Copper base alloys, dendrite evolution, Dendritic structure, Evolution, Experiments, Furnaces, Grooves, Morphology, phase field modeling, Simulation, Solidification, Solids, Synchrotron radiation, synchrotron X-ray tomography, Synchrotrons, Temperature, Three dimensional models, Tomography, X ray microtomography