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Modeling of Microstructure and Microsegregation in Solidification of Multi-Component Alloys

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Abstract

Driven by industrial demand, extensive efforts have been made to investigate microstructure evolution and microsegregation development during solidification of multicomponent alloys. This paper briefly reviews the recent progress in modeling of microstructures and microsegregation in solidification of multicomponent alloys using various models including micromodel, phase field, front tracking, and cellular automaton approaches. A two-dimensional modified cellular automaton (MCA) model coupled with phase diagram software PanEngine is presented for the prediction of microstructures and microsegregation in the solidification of ternary alloys. The model adopts MCA technique to simulate dendritic growth. The thermodynamic data needed for determining the dynamics of dendritic growth are calculated with PanEngine. After validating the model by comparing the simulated values with the prediction of the Scheil model for solute profiles in the primary dendrites as a function of solid fraction, the model was applied to simulate the microstructure and microsegregation in the solidification of Al-rich ternary alloys. The simulation results demonstrate the capabilities of the present model not only to simulate realistic dendrite morphologies, but also to predict quantitatively the microsegregation profiles in the solidification of multi-component alloys.

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Acknowledgments

The research of M.F.Z. was supported by the National Natural Science Foundation of China under Grant Nos. 50371015 and 50671025. Y. Austin Chang wishes to thank NSF through the FRG Grant No. DMR-0309468 and Wisconsin Distinguished Professorship for support.

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Authors and Affiliations

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

    M.-F. Zhu

  2. Department of Materials Science and Engineering, University of Wisconsin-Madison, 1509 University Avenue, Madison, WI, USA

    W. Cao & Y. A. Chang

  3. CompuTherm LLC, 437 S. Yellowstone Dr., Suite 217, Madison, WI, USA

    S.-L. Chen

  4. Center for Computer-Aided Materials Processing (CAMP), Department of Metallurgical Engineering, Yonsei University, Shinchon-dong 134, Seodaemun-ku, Seoul, 120-749, Korea

    C.-P. Hong

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  1. M.-F. Zhu
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  2. W. Cao
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  3. S.-L. Chen
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  4. C.-P. Hong
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  5. Y. A. Chang
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Correspondence to M.-F. Zhu.

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Zhu, MF., Cao, W., Chen, SL. et al. Modeling of Microstructure and Microsegregation in Solidification of Multi-Component Alloys. J Phs Eqil and Diff 28, 130–138 (2007). https://doi.org/10.1007/s11669-006-9011-8

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