Al-Fe二元合金共晶组织的数值模拟  

NUMERICAL MODELLING OFEUTECTIC MICROSTRUCTURE FORAl-Fe BINARY ALLOY

作　　者：李荣德[1] 周振平[1] 李述军[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110023

出　　处：《机械工程学报》2003年第3期121-125,共5页Journal of Mechanical Engineering

基　　金：国家教育部优秀青年骨干教师基金资助计划(0027119)。

摘　　要：在考虑温度梯度对共晶生长的影响并假设固液界面为曲面的基础上,建立了与时间相关的层片共晶生长的自调整模型,采用有限差分法进行了数值求解。对含2％Fe的共晶Al—Al3Fe组织的平均层片间距进行了数值模拟,计算出了固液界面前沿的浓度场分布。采用定向凝固试验验证了模拟结果的正确性。A self-adjusting eutectic growth model with time is presented on the basis of the effect of temperature gradient on eutectic growth and a curved solid-liquid interface. Finite differential method (FDM) is adopted to solve the model. The average interlamellar spacings of the Al-Al3Fe in Al-2%Fe eutectic alloy and the concentration fields ahead of the solid fying interface are calculated. Unidirectional solidification experiments are carried out in order to demonstrate the correction of the modelling. The experimental results are in relatively good agreement with calculations.

关 键 词：共晶铝铁合金 数值模拟 生长速度 层片间距 

分 类 号：TG249.4[金属学及工艺—铸造]