| 半固态A356铝合金的稳态流变性能 |
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| 引用本文： | 张艳菊,毛卫民,赵振铎,刘政. 半固态A356铝合金的稳态流变性能[J]. 金属学报, 2006, 42(2): 163-166 |
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| 作者姓名： | 张艳菊 毛卫民 赵振铎 刘政 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083;北京科技大学材料科学与工程学院,北京,100083;北京科技大学材料科学与工程学院,北京,100083;北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家科技攻关项目;中国科学院资助项目 |
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| 摘 要： | 采用Couette型同轴双筒流变仪对半固态A356铝合金的等温稳态表观粘度进行了测试．结果表明；半固态A356合金的稳态表观粘度（ηa）随着固相分数（fs）的增加而增加，但随剪切速率（γ）的增大而减小，当，fs达到某一临界值之后，ηa迅速增加．可用方程ηa=2．79exp（6．27fa）γ^-0.7描述fs，γ对ηa的影响．
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| 关 键 词： | 半固态 A356铝合金 表观粘度 固相分数 剪切速率 |
| 文章编号： | 0412-1961（2006）02-0163-04 |
| 收稿时间： | 2005-05-11 |
| 修稿时间： | 2005-05-112005-07-18 |
Rheological Behavior of Semi--solid A356 Aluminum Alloy at Steady State |
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| ZHANG Yanju,MAO Weimin,ZHAO Zhenduo,LIU Zheng. Rheological Behavior of Semi--solid A356 Aluminum Alloy at Steady State[J]. Acta Metallurgica Sinica, 2006, 42(2): 163-166 |
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| Authors: | ZHANG Yanju MAO Weimin ZHAO Zhenduo LIU Zheng |
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| Affiliation: | School of Matericals Science and Engineering, University of Science and Technoloy Beijing, Beijing 100083 |
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| Abstract: | The rheological behavior of the semi-solid slurry of A356 aluminum alloy has been studied through a Couette-type viscometer. The experimental results show that the apparent viscosity of semi-solid A356 alloy increases with the fraction solid increasing, but decreases with the shearing rate increasing in the steady-state. When the solid fraction reaches a critical value, the apparent viscosities increase rapidly. An empirical equation that shows the effect of fraction solid and shearing rate on the apparent viscosity of semi-solid A356 alloy is built as the following, =13.61exp(6.09 ) -1.01. |
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| Keywords: | semi-solid A356 aluminum alloy apparent viscosity fraction solid shearing rate |
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