Numerical Prediction of Eutectic Temperature Using a Multi-phase-Field Model
Numerical Prediction of Eutectic Temperature Using a Multi-phase-Field Model
复制标题
使用多相场模型对共晶温度进行数值预测
DOI：
10.1007/s10765-011-1089-5
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Hidehiro Onodera
中科院分区：
文献类型：
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作者：
Machiko Ode;Naohiko Sasajima;Yoshiro Yamada;Pieter Bloembergen;Hidehiro Onodera
为了评估金属-碳共晶系统作为下一代国际温标固定点的可靠性，采用多相场模型初步研究了共晶组织对凝固和熔化过程中固/液（s/l）界面温度的影响。首先，在凝固过程中的炉温度，片层间距，和界面能上的s/l界面的平均温度的影响进行了研究。随着炉内过冷度的增加，s/l界面温度降低。然后采用计算的共晶显微组织作为熔化模拟的初始条件。熔化过程中的界面过冷度小于凝固过程中观察到的过冷度。界面过冷度的这种差异归因于s/l界面附近液相中的溶质/溶剂浓度分布对于熔化和凝固是不同的。
To evaluate the reliability of metal-carbon eutectic systems as fixed points for the next generation of the international temperature scale, the effect of the eutectic microstructure on the temperature at the solid/liquid (s/l) interface during solidification and melting is preliminarily investigated using a multi-phase-field model. First, the effects of furnace temperature, lamellar spacing, and interface energy on the average temperature of the s/l interface are studied in the solidification process. With increased furnace undercooling, the s/l interface temperature was found to decrease. Calculated eutectic microstructures are then adopted as initial conditions for a melting simulation. The interface undercooling during melting is observed to be smaller than that observed during solidification. This difference in interface undercooling is attributed to the solute/solvent concentration profiles in the liquid phase near the s/l interface being different for melting and solidification.