| Numerical Modeling of Dendrite Growth in Al Alloys |
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| 作者姓名： | 许庆彦 柳百成 |
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| 作者单位： | Department of Mechanical Engineering，Tsinghua University，Beijing 100084，China，Department of Mechanical Engineering，Tsinghua University，Beijing 100084，China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Nos. 59990470-3 and 50275081)，the National Key Basic Research Priorities Programe of China(No. G2000067208-3)，the Young Teacher Foundation of the Department of Mechanical |
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| 摘 要： | Dendritic grains are the most often observed microstructure in metals and alloys. In the past decade, more and more attention has been paid to the modeling and simulation of dendritic microstructures. This paper describes a modified diffusion-limited aggregation model to simulate the complex shape of the dendrite grains during metal solidification. The fractal model was used to simulate equiaxed dendrite growth. The fractal dimensions of simulated Al alloy structures range from 1.63-1.88 …
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Numerical Modeling of Dendrite Growth in Al Alloys |
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| XU Qingyan ,LIU Baicheng.Numerical Modeling of Dendrite Growth in Al Alloys[J].Tsinghua Science and Technology,2004,9(5). |
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| Authors: | XU Qingyan LIU Baicheng |
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| Abstract: | Dendritic grains are the most often observed microstructure in metals and alloys. In the past decade, more and more attention has been paid to the modeling and simulation of dendritic microstructures. This paper describes a modified diffusion-limited aggregation model to simulate the complex shape of the dendrite grains during metal solidification. The fractal model was used to simulate equiaxed dendrite growth. The fractal dimensions of simulated Al alloy structures range from 1.63-1.88 which compares well with the experimentally-measured fractal dimension of 1.85; therefore, the model accurately predicts not only the dendritic structure morphology, but also the fractal dimension of the dendrite structure formed during solidification. |
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| Keywords: | fractal theory diffusion-limited aggregation model dendrite growth metal solidification |
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