基于数学模型Al-2%Cu二元合金液相扩散系数的推导  

Deduction of Liquid Diffusion Coefficient of Al-2%Cu Binary Alloy Based on Mathematical Model

作　　者：徐秋仓 张哲[2] 

机构地区：[1]河南师范大学,河南新乡453007 [2]安阳职业技术学院,河南安阳455000

出　　处：《铸造技术》2014年第6期1187-1189,共3页Foundry Technology

摘　　要：通过对Miedema和Eyring模型加以改进,提出了新的理论模型。计算了二元合金在凝固过程中的液相扩散系数,分析了其对合金微观组织的影响。结果表明,无论是柱状晶比例还是两种晶粒大小,采用修正的液相扩散系数得到的微观组织模拟结果与实验结果均相差不大。A new theoretical model was proposed by modifying Miedema and Eyring model. And the liquid diffusion coefficient of binary alloy during solidification was calculated, and the effect of the liquid diffusion coefficient on the microstructure of the alloy was analyzed. The results Show that the simulation results obtained by the modified liquid diffusion coefficient are nearly agreed with the experimental results both in the proportion of columnar grain and grain size.

关 键 词：二元合金 理论模型 液相扩散系数 

分 类 号：TG146.21[一般工业技术—材料科学与工程]