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首页> 外文期刊>International Journal of Heat and Mass Transfer >Macrosegregations in Sn-3 wt%Pb alloy solidification: Experimental and 3D numerical simulation investigations
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Macrosegregations in Sn-3 wt%Pb alloy solidification: Experimental and 3D numerical simulation investigations

机译：Sn-3 wt％Pb合金凝固中的宏观偏析：实验和3D数值模拟研究

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摘要

The numerical simulation of macrosegregation formation during the horizontal solidification of a Sn-3 wt %Pb alloy in a rectangular cavity is presented and compared to experimental results. The benchmark experiment consists in solidifying a rectangular ingot of Sn-3 wt%Pb alloy using a solidification setup with a precise control of the thermal boundary conditions. The 3D simulation is based on a model formerly derived with a two-phase volume averaging technique. It is focused on the solidification stage of the experiment, during which lead segregation occurs. Both the temperature field measured in situ during the solidification and the post-mortem observations of macrostructures can be compared with the numerical simulation results. These comparisons are rather good: the evolution of the temperature field during the solidification process is well reproduced, and the main zones of lead enrichment are recovered. A particular focus is made on the segregated channels development mechanism, as well as their size and geometric shape. They are observed to grow in the vicinity of the side walls and to feature a curved tubular shape in the simulations.
机译：给出了在矩形腔中水平凝固Sn-3 wt％Pb合金过程中宏观偏析形成的数值模拟，并与实验结果进行了比较。基准实验包括使用具有精确控制热边界条件的凝固装置来凝固Sn-3 wt％Pb合金的矩形锭。 3D仿真基于以前使用两相体积平均技术得出的模型。它集中在实验的固化阶段，在此阶段会发生铅偏析。可以将凝固过程中现场测量的温度场和宏观结构的事后观察结果与数值模拟结果进行比较。这些比较相当不错：凝固过程中温度场的变化得到了很好的再现，并且铅富集的主要区域得以恢复。特别关注隔离通道的开发机制，以及它们的大小和几何形状。观察到它们在侧壁附近生长，并且在模拟中具有弯曲的管状形状。

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  • 作者

    R. Boussaa; L. Hachani; O. Budenkova; V. Botton; D. Henry; K. Zaidat; H. Ben Hadid; Y. Fautrelle;

  • 作者单位

    Laboratoire de Thermodynamique et Systemes Energetiques, Faculte de Physique, Universite des sciences et de la technologie Houari Boumediene (USTHB), BP32 El Alia, Bab Ezzouar, Alger, Algeria;

    Laboratoire de physique des materiaux, Universite Amar Telidji-Laghouat, Route de Ghardaia - BP 37G, Laghouat, Algeria;

    Laboratoire SIMAP-EPM, Grenoble Institute of Technology, BP 75, 38402 Saint Martin d'Heres, France;

    Laboratoire de Mecanique des Fluides et d'Acoustique, CNRS/Universite de Lyon, Ecole Centrale de Lyon/Universite Lyon 1/INSA de Lyon, ECL, 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France,INSA Euromed, Universite Euro-Mediterraneenne de Fes, Morocco;

    Laboratoire de Mecanique des Fluides et d'Acoustique, CNRS/Universite de Lyon, Ecole Centrale de Lyon/Universite Lyon 1/INSA de Lyon, ECL, 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France;

    Laboratoire SIMAP-EPM, Grenoble Institute of Technology, BP 75, 38402 Saint Martin d'Heres, France;

    Laboratoire de Mecanique des Fluides et d'Acoustique, CNRS/Universite de Lyon, Ecole Centrale de Lyon/Universite Lyon 1/INSA de Lyon, ECL, 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France;

    Laboratoire SIMAP-EPM, Grenoble Institute of Technology, BP 75, 38402 Saint Martin d'Heres, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solidification; Macrosegregation; Freckles; Benchmark; Binary alloy; 3D model; Phase change;

    机译：凝固;宏观隔离;雀斑;基准;二元合金3D模型;相变;

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