Fe-C等温凝固中的枝晶生长的溶质俘获相场法模拟  

Simulation of Dendrite Growth of Fe-1.0wt.%C in Isothermal Solidification with Solute Trapping by Phase Field Method

作　　者：张超彦[1] 秋艳[1] 佟乐乐[2] 

机构地区：[1]徐州工业职业技术学院,江苏徐州221100 [2]中北大学材料学院,山西太原030051

出　　处：《铸造设备与工艺》2016年第5期47-50,共4页Foundry Equipment & Technology

摘　　要：采用模拟相场法模拟了C的质量分数为1%的铁碳合金等温凝固过程中枝晶生长和溶质分布及溶质俘获对其的影响,研究枝晶尖端半径大小和生长速度之间的关系。结果表明,初始枝晶的溶质浓度最低,二次枝晶之间的区域溶质浓度最高。枝晶生长包括生长和成熟阶段,枝晶的尖端半径大小与生长速度成反比。受溶质俘获的影响,枝晶上的溶质浓度有波动。The simulation used the Phase Field Method to calculate the dendrite growth of Fe-C in isothermal solidification,studied the relationship between tip radius and tip velocity,simulated the solute distribution and the effect on the distribution of solute trapping.The result suggests that the primary stalk has the lowest concentration,and the regions between the secondary arms are the highest.The dendrite growth include growing and ripening stages.The tip radius and velocity are in inverse proportion.Because of the solute trapping,the concentration in the dendrites has a fluctuation.

关 键 词：相场法 枝晶生长 溶质俘获 

分 类 号：TG111.4[金属学及工艺—物理冶金]