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Computational Modeling of Microstructure Evolution in Solidification of Aluminum Alloys

  • Symposium: Simulation of Aluminum Shape Casting Processing
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Metallurgical and Materials Transactions B Aims and scope Submit manuscript

In this article, a front tracking (FT) model and a modified cellular automaton (MCA) model are presented and their capabilities in modeling the microstructure evolution during solidification of aluminum alloys are demonstrated. The FT model is first validated by comparison with the predictions of the Lipton–Glicksman–Kurz (LGK) model. Calculations of the steady-state dendritic tip growth velocity and equilibrium liquid composition as a function of melt undercooling for an Al-4 wt pct Cu alloy exhibit good agreement between the FT simulations and the LGK predictions. The FT model is also used to simulate the secondary dendrite arm spacing as a function of local solidification time. The simulated results agree well with the experimental data. The MCA model is applied to simulate dendritic and nondendritic microstructure evolution in semisolid processing of an Al-Si alloy. The effect of fluid flow on dendritic growth is also examined. The solute profiles in equiaxed dendritic solidification of a ternary aluminum alloy are simulated as a function of cooling rate and compared with the prediction of the Scheil model. The MCA model is extended to the multiphase system for the simulation of eutectic solidification. A particular emphasis is made on the quantitative aspects of simulations.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Southeast University, Nanjing, 210096, China

    M. F. Zhu (Professor)

  2. Department of Metallurgical Engineering, Yonsei University, Seoul, 120-749, Korea

    C. P. Hong (Professor and Director of the Center for Computer-Aided Materials Processing (CAMP)

  3. Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 43210, USA

    D. M. Stefanescu (FEF Key Professor)

  4. Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA

    Y. A. Chang (Wisconsin Distinguished Professor)

Authors
  1. M. F. Zhu
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  2. C. P. Hong
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  3. D. M. Stefanescu
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  4. Y. A. Chang
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Correspondence to M. F. Zhu.

Additional information

This article is based on a presentation made in the symposium ”Simulation of Aluminum Shape Casting Processing: From Design to Mechanical Properties,” which occurred March 12–16, 2006, during the TMS Spring Meeting in San Antonio, Texas, under the auspices of the Computational Materials Science and Engineering Committee, the Process Modeling, Analysis and Control Committee, the Solidification Committee, the Mechanical Behavior of Materials Committee, and the Light Metal Division/Aluminum Committee.

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Zhu, M.F., Hong, C.P., Stefanescu, D.M. et al. Computational Modeling of Microstructure Evolution in Solidification of Aluminum Alloys. Metall Mater Trans B 38, 517–524 (2007). https://doi.org/10.1007/s11663-007-9052-3

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