Al-Cu合金凝固成分偏析模式及3D相场模拟  

Simulation of Solidification Segregation Pattern and 3D Phase Field for Al-Cu Alloy

作　　者：丁恒敏[1] 白钢印 浦吕春[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《热加工工艺》2015年第9期69-71,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(50964009);云南省科技厅应用基金面上项目(2009ZC030M)

摘　　要：基于每个单元的溶质守恒,求解了合金凝固过程中溶质的扩散方程。考虑温度分布随时间变化,在绝热和高度过冷的液相中,对Al-Cu合金枝晶生长中液相和固相溶质的再分配进行了三维计算。在固定的笛卡尔网格上开发了数值算法以显式跟踪固/液界面,并进行了枝晶形貌演变模拟。The solute diffusion equation in solidification process was solved based on the solute conservation of each unit.Considering temperature distribution changing with time,the three-dimensional redistribution of liquid and solid phase solute in Al-Cu alloy dendrite growth was computed in the adiabatic and highly supercooled liquid phase. A numerical algorithm was developed to explicitly track the sharp solid/liquid（S/L） interface on a fixed Cartesian grid. And the evolution of dendrite morphology was simulated.

关 键 词：三维相场模型 树枝状组织 偏析 

分 类 号：TG244.3[金属学及工艺—铸造] TG111.4