| Al—4.5wt—%Cu合金沟槽偏析的数值模拟 |
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| 引用本文： | 喻秋平,周尧和.Al—4.5wt—%Cu合金沟槽偏析的数值模拟[J].金属学报,1990,26(5):112-118. |
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| 作者姓名： | 喻秋平 周尧和 |
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| 作者单位： | 西北工业大学材料科学与工程系国家凝固技术实验室，西北工业大学 讲师 |
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| 摘 要： | 在多孔介质的连续介质模型基础上建立了宏观偏析模拟计算的诸方程,采用尝试法计算解决了各个方程中由于未知变量相互制约而引起的非线性问题,结果表明,Al-Cu合金铸锭在低速冷却条件下,存在由自然对流引起的径向回流分量;最终成分分布的计算值与实验值吻合较好,确认了偏析模拟计算的价值。
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| 关 键 词： | Al－Cu合金 沟 槽偏析 模拟 |
| 收稿时间： | 1990-05-18 |
| 修稿时间： | 1990-05-18 |
NUMERICAL SIMULATION OF CHANNEL SEGREGATION OF Al-4.5wt-%Cu ALLOY |
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| YU Qiuping,ZHOU Yaohe Northwestern Polytechnical University,Xi''''an.NUMERICAL SIMULATION OF CHANNEL SEGREGATION OF Al-4.5wt-%Cu ALLOY[J].Acta Metallurgica Sinica,1990,26(5):112-118. |
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| Authors: | YU Qiuping ZHOU Yaohe Northwestern Polytechnical University Xi'an |
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| Abstract: | The equations for numerical simulation of channel segregation basedon a model of continuum approach to porous medium were advanced. In order tosolve non-linear computation problems caused by the interaction with each other ofunknown variables in the equations, the trial-and-error method is used. The com-putation results showed that radial back-flow due to natual convection in mushyzone indeed exists in the Al-4.5wt-%Cu alloy ingot under the condition of lowcooling rate, and the numerical simulation of channel segregation is available dueto coincidence of calculating final concentration with the test values. |
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| Keywords: | channel segregation numerical simulation back-flow mushy zone |
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