A mathematical model for prediction of microporosity in aluminum alloy A356
A mathematical model for prediction of microporosity in aluminum alloy A356
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DOI：
10.1007/s00170-012-4102-7
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发表时间：
2013-02-01
影响因子：
3.4
通讯作者：
Shabani, Mohsen Ostad
中科院分区：
文献类型：
--
作者：
Bahmani, Ahmad;Hatami, Nader;Shabani, Mohsen Ostad
基于有限差分法建立了A356铝合金铸件中气孔分布的数学模型。在该模型中求解了热量、质量和气体守恒方程。此外，达西方程被认为是在糊状区。结果表明，铸件中显微气孔的分布和浓度随冷却速度和初始气体含量的变化而变化。模拟结果与实验数据进行了比较，发现与实验结果成比例的良好协议。最后，一个复杂的铸造零件进行了模拟，提出了该模型的能力，以预测工业铸造零件的孔隙。
In the present work, a mathematical model was developed based on finite difference method to predict the microporosity distribution in A356 aluminum alloy casting. Heat, mass, and gas conservation equations were solved in this model. Moreover, Darcy's equation was considered in the mushy zone. Results show that the distribution and concentration of microporosities in cast parts vary with both cooling rate and initial gas content. Simulation results were compared with experimental data where proportionally good agreement with experimental results was found. Finally, a complex cast part was simulated presenting the ability of the model to predict the porosities in industrial cast parts.