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

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

Abstract

© 2021 by the authors. Licensee MDPI, Basel, Switzerland. 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.

Citation

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

• Journal Article Type: Article
• Acceptance Date: Jan 16, 2021
• Online Publication Date: Jan 21, 2021
• Publication Date: Feb 1, 2021
• Deposit Date: Apr 11, 2022
• Publicly Available Date: Apr 11, 2022
• Journal: Materials
• Electronic ISSN: 1996-1944
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 14
• Issue: 3
• Article Number: 520
• DOI: https://doi.org/10.3390/ma14030520
• Keywords: Phase field modeling; Dendrite evolution; Solidification; Synchrotron X-ray tomography
• Public URL: https://hull-repository.worktribe.com/output/3710928