| Dependence of phase selection on cooling rates in as-cast A1-Si-Mg alloys |
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| 作者姓名： | 何志 张瑞杰 刘永勤 介万奇 |
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| 作者单位： | [1]College of Materials Science and Engineering, Northwestern Polytechnical University, Xi＇an 710072, China [2]Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China |
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| 基金项目： | Foundation item： Project （2006CB605202） supported by the Hi-tech Research and Development Program of China |
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| 摘 要： | The effect of cooling rate on the solidification process of Al-2.06%Si-1.58%Mg was numerically and experimentally investigated. The solidification paths and the phase precipitation sequence were predicted based on the solute transportation analysis in the solidification process by coupling the thermodynamic calculation. Due to the different solute diffusion speeds, the solidification paths can be largely influenced by the cooling rates. Different phase precipitation sequences can be obtained through calculation under different cooling rates. And the later experiments have also proved this phenomenon. In the researched Al-2.06%Si-1.58%Mg alloy, the solidification sequences are α（Al）-α（Al）＋Si-α（Al）＋Mg2Si＋Si under low cooling rate and α（Al）- α（Al）＋Mg2Si-α（Al）＋Mg2Si＋Si under high cooling rate, respectively. The experimental results confirm the calculation predications.
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| 关 键 词： | 铝 硅 镁 合金 冷却工艺 金相 金属铸造工艺 |
| 收稿时间： | 2006-07-28 |
| 修稿时间： | 2006-09-15 |
Dependence of phase selection on cooling rates in as-cast A1-Si-Mg alloys |
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| HE Zhi, ZHANG Rui-jie, LIU Yong-qin, JIE Wan-qi.Dependence of phase selection on cooling rates in as-cast A1-Si-Mg alloys[J].Transactions of Nonferrous Metals Society of China,2006,16(A03):1592-1594. |
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| Authors: | HE Zhi ZHANG Rui-jie LIU Yong-qin JIE Wan-qi |
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| Abstract: | |
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| Keywords: | Al-Si-Mg alloys cooling rate solute transportation phase selection |
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