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Simulation of stray grain formation during unidirectional solidification of IN738LC superalloy

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Abstract

The influence of casting parameters on stray grain formation of a unidirectionally solidified superalloy IN738LC casting with three platforms was investigated by using a 3D cellular automaton-finite element (CAFE) model in CALCOSOFT package. The model was first validated by comparison of the reported grain structure of Al-7%Si (mass fraction) alloy. Then, the influence of pouring temperature, heat flux of the lateral surface, convection heat coefficient of the cooled chill and mean undercooling of the bulk nucleation on the stray grain formation was studied during the unidirectional solidification. The predictions show that the stray grain formation is obviously sensitive to the pouring temperature, heat flux and mean undercooling of the bulk nucleation. However, increasing the heat convection coefficient has little influence on the stray grain formation.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai, 200072, China

    **ang-mei Li  (**响妹), Jie-yu Zhang  (张捷宇), Bo Wang  (王波) & Zhong-ming Ren  (任忠鸣)

  2. School of Metallurgical and Ecological Engineering, Bei**g University of Science and Technology, Bei**g, 100083, China

    Guo-zhi Zhou  (周国治)

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  1. **ang-mei Li  (**响妹)
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  2. Jie-yu Zhang  (张捷宇)
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  3. Bo Wang  (王波)
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  4. Zhong-ming Ren  (任忠鸣)
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  5. Guo-zhi Zhou  (周国治)
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Corresponding author

Correspondence to Jie-yu Zhang  (张捷宇).

Additional information

Foundation item: Project(08BZ1130100) supported by the Science and Technology Committee of Shanghai, China; Project(SHUCX102251) supported by the Innovation Fund for Graduate Student of Shanghai University, China

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Li, Xm., Zhang, Jy., Wang, B. et al. Simulation of stray grain formation during unidirectional solidification of IN738LC superalloy. J. Cent. South Univ. Technol. 18, 23–28 (2011). https://doi.org/10.1007/s11771-011-0653-2

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  • DOI: https://doi.org/10.1007/s11771-011-0653-2

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