论文部分内容阅读
在前人提出的二次枝晶臂等温粗化的四种物理模型的基础上建立了多元合金二次枝晶臂等温粗化动力学数学模型。将这些数学模型运用于Al-Cu-Fe、Al-Cu1-Si、Al-Cu-Mn三元合金中发现它们与日本学者森信幸等人所作的实验结果相一致,说明它们是可信的。实验与理论分析表明,在多元合金凝固过程中局部凝固时间相同的条件下,溶质浓度的增加有利于二次枝晶臂的细化。
Based on the four physical models of isothermal coarsening of the secondary dendrite arm proposed by the predecessors, the isothermal coarsening dynamic mathematical model of the secondary dendrite arm of the multi-alloy was established. Applying these mathematical models to Al-Cu-Fe, Al-Cu1-Si and Al-Cu-Mn ternary alloys, we find that they are consistent with the experimental results of Japanese scholar Morimoto et al. Experiments and theoretical analysis show that the increase of solute concentration is beneficial to the refinement of secondary dendritic arms under the condition of the same local solidification time during the solidification of the multi-alloy.