| 二元合金凝固过程微尺度热质传输的影响分析 |
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| 引用本文： | 聂红,冯妍卉,张欣欣,张燎原. 二元合金凝固过程微尺度热质传输的影响分析[J]. 工程热物理学报, 2006, 27(Z2): 45-48 |
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| 作者姓名： | 聂红 冯妍卉 张欣欣 张燎原 |
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| 作者单位： | 北京科技大学机械工程学院,北京,100083 |
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| 摘 要： | 针对二元合金凝固的微观偏析现象建立一维平面枝晶模型,考虑溶质在固相中有限扩散,液相完全扩散的情况。通过模拟计算,比较分析了Al-Cu和Fe-C合金微观偏析的特点,并讨论了不同凝固速度以及溶质扩散系数随温度变化与否对微观偏析的影响。分析结果表明,温度场的影响是不可忽略的,应该在研究中予以考虑。
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| 关 键 词： | 二元合金 枝晶凝固 微观偏析 数值模型 |
| 文章编号： | 0253-231X(2006)Suppl.2-0045-04 |
| 修稿时间： | 2006-01-06 |
EFFECT OF MICRO SCALE HEAT AND MASS TRANSFER ON SOLIDIFICATION OF BINARY ALLOYS |
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| NIE Hong,FENG Yan-Hui,ZHANG Xin-Xin,ZHANG Liao-Yuan. EFFECT OF MICRO SCALE HEAT AND MASS TRANSFER ON SOLIDIFICATION OF BINARY ALLOYS[J]. Journal of Engineering Thermophysics, 2006, 27(Z2): 45-48 |
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| Authors: | NIE Hong FENG Yan-Hui ZHANG Xin-Xin ZHANG Liao-Yuan |
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| Abstract: | One dimensional platelike dendritic model was developed describing the microsegregation during binary alloy solidification, considering solid back-diffusion and complete diffusion in the liquid. The specialties of microsegregation of Al-Cu and Fe-C alloys were compared and analyzed by simulation. Moreover, the effect of different solidification velocity on microsegregation was discussed, as well as the influence of solute diffusion coefficient varied with or without the temperature. The results of the analysis indicated that the effect of the temperature field was not negligible and should be considered in the research. |
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| Keywords: | binary alloys dendritic solidification microsegregation numerical model |
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