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Phase field modeling for dendritic morphology transition and micro-segregation in multi-component alloys

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Abstract

By using the phase field model for the solidification of multi-component alloys and coupling with real thermodynamic data, the dendritic morphology transition and the dendritic micro-segregation of Ni-Al-Nb ternary alloys are simulated in two cases, i.e., varying the alloy composition at a fixed undercooling and varying the undercooling at a fixed alloy composition. The simulated results indicate that with the increase of the dimensionless undercooling U (U=ΔT/ΔT 0, where ΔT is the undercooling and ΔT 0 the temperature interval between the solidus and liquidus), the dendritic morphology transfers from dendritic to globular growth in both cases. As to the dendritic micro-segregation, both cases present a regularity of increasing at first and then decreasing.

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China

    JinCheng Wang, YuXiang Zhang, YuJuan Yang, JunJie Li & GenCang Yang

Authors
  1. JinCheng Wang
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  2. YuXiang Zhang
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  3. YuJuan Yang
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  4. JunJie Li
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  5. GenCang Yang
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Correspondence to JinCheng Wang.

Additional information

Supported by the National Natural Science Foundation of China (Grant No. 50401013) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of the People’s Republic of China

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Wang, J., Zhang, Y., Yang, Y. et al. Phase field modeling for dendritic morphology transition and micro-segregation in multi-component alloys. Sci. China Ser. E-Technol. Sci. 52, 344–351 (2009). https://doi.org/10.1007/s11431-008-0155-0

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  • DOI: https://doi.org/10.1007/s11431-008-0155-0

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