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Numerical description for the recalescence of bulk-undercooled Cu_(70)Ni_(30) alloy

机译：块状过冷Cu_（70）Ni_（30）合金再结晶的数值描述

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摘要

Assuming thermal balance and solute conservation, a numerical model has been proposed to describe the recalescence behavior of bulk-undercooled Cu-Ni melts. Applying a finite-difference scheme, the transformed solid fraction upon recalescence is given as a function of the liquid temperature, while the average liquid concentration can be tracked by calculation of the liquid/solid (L/S) Gibbs energy difference, in combination with a dendrite growth model. Accordingly, a transition from non-equilibrium to equilibrium process has been described from the evolution of L/S Gibbs energy difference. Applying the present model, the experimentally observed maximum recalescence temperature can be well predicted.
机译：假设热平衡和溶质守恒，已提出了一个数值模型来描述块体过冷的Cu-Ni熔体的重结晶行为。应用有限差分方案，重新液化后的固体转化率随液体温度变化而变化，而平均液体浓度可通过计算液体/固体（L / S）吉布斯能量差并结合计算得出。树突生长模型。因此，已经从L / S吉布斯能量差的演变描述了从非平衡过程到平衡过程的过渡。应用本模型，可以很好地预测实验观察到的最大再发光温度。

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  • 来源
    《Journal of Crystal Growth》 |2009年第11期|3225-3230|共6页
  • 作者

    W. Yang; F. Liu; H. Liu; H.F. Wang; G.C Yang; Y.H. Zhou;

  • 作者单位

    State Key Laboratory of Solidification Processing. Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China;

    State Key Laboratory of Solidification Processing. Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China;

    State Key Laboratory of Solidification Processing. Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China;

    State Key Laboratory of Solidification Processing. Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China;

    State Key Laboratory of Solidification Processing. Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China;

    State Key Laboratory of Solidification Processing. Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China;

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

    A1: Solidification; A1: Solid solutions; A2: Growth from melt; B1: Alloys;

    机译：A1：凝固;A1：固溶体;A2：熔体生长;B1：合金;

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