用相场法模拟纯铝的枝晶生长  

Simulation of Dendrite Growth of Pure Aluminium Using Phase-field Method

作　　者：张宙庆[1] 侯华[1] 张国伟[1] 徐宏[1] 

机构地区：[1]华北工学院材料工程系,山西太原030051

出　　处：《铸造技术》2005年第1期65-67,共3页Foundry Technology

摘　　要：利用相场法微观组织数值模拟技术,对纯铝物质的枝晶生长过程进行了仿真.研究了初始晶核半径、空间步长和各向异性对纯铝枝晶生长的影响.通过计算结果表明,在保证初始晶核半径不被熔化前提下,初始晶核半径不影响枝晶形貌;空间步长取值应在0.2d0～0.6d0范围内;各向异性趋于增大枝晶尖端生长速度,减小枝晶尖端半径.The dendrite growth in the undercooled melt of pure is simulated by the phase-field method. The dependence of aluminum dendrite growth on the initial nucleus radius, space step and anisotropy is investigated. By a series of simulation, the calculated results indicate that the value of the initial nucleus radius has not influence upon the dendrite patterns with the precondition that initial nucleus can not be melted; the space step ranges from 0.2d0 to 0.6d0; the anisotropy coefficient tends to increase the growth velocity of dendrite tip and reduce tip radius.

关 键 词：相场法 枝晶生长 数值模拟 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]