精品文档---下载后可任意编辑Al-1.96％molCu 合金定向凝固数值模拟的开题报告摘要铝铜合金因其良好的综合性能在工业上被广泛应用。本文拟通过数值模拟方法讨论 Al-1.96％molCu 合金定向凝固过程，并分析其晶粒生长行为。首先，利用热力学数据库计算出合金的相平衡数据，然后采纳有限元方法建立计算模型并求解，得到了温度场和浓度场分布。其次，利用耦合晶体学理论模拟了晶粒取向演化过程，并结合物理模型模拟出晶粒生长过程中的形态演化规律。最后，对模拟结果进行了对比分析和验证，并在此基础上提出了优化工艺方案的建议和思路。关键词：铝铜合金，定向凝固，数值模拟，晶粒生长AbstractAluminum-copper alloy is widely used in industrial production because of its excellent properties. In this paper, numerical simulation method is used to study the directional solidification process of Al-1.96％molCu alloy, and the grain growth behavior is analyzed. First, the phase equilibrium data of the alloy is calculated using the thermodynamic database. Then, a computational model is established and solved using the finite element method to obtain the temperature and concentration field distributions. Second, the crystal orientation evolution process is simulated using the coupled crystallography theory, and the morphological evolution law in the process of grain growth is simulated using the physical model. Finally, the simulation results are compared and analyzed, and suggestions and ideas for optimizing the process are proposed based on this.Keywords: aluminum-copper alloy, directional solidification, numerical simulation, grain growth
