3D phase field modeling of multi-dendrites evolution in solidification and validation by synchrotron x-ray tomography

Shuo Wang, Zhipeng Guo*, Jinwu Kang, Meishuai Zou, Xiaodong Li, Ang Zhang, Wenjia Du, Wei Zhang, Tung Lik Lee, Shoumei Xiong, Jiawei Mi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In this paper, the dynamics of multi-dendrite concurrent growth and coarsening of an Al-15 wt.% 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 − Rn0=kc(t − t0), but with a higher constant of n = 4.3.

Original languageEnglish
Article number520
Pages (from-to)1-19
Number of pages19
JournalMaterials
Volume14
Issue number3
DOIs
Publication statusPublished - 1 Feb 2021

Keywords

  • Dendrite evolution
  • Phase field modeling
  • Solidification
  • Synchrotron X-ray tomography

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Wang, S., Guo, Z., Kang, J., Zou, M., Li, X., Zhang, A., Du, W., Zhang, W., Lee, T. L., Xiong, S., & Mi, J. (2021). 3D phase field modeling of multi-dendrites evolution in solidification and validation by synchrotron x-ray tomography. Materials, 14(3), 1-19. Article 520. https://doi.org/10.3390/ma14030520