摘要
采用相场法对铸造Al-4.2Cu合金的凝固组织中的枝晶生长速率和枝晶尖端半径进行了计算机模拟,并与Ivantsov理论计算得到的Peclet数值进行了对比分析。结果表明,Al-4.2Cu合金凝固过程中枝晶尖端生长速率基本分布在0.04 m/s附近,Al-4.2Cu合金凝固过程中枝晶尖端半径则主要分布在1.0×10-7m;本文的相场法计算模拟得到的非等温和等温凝固结果和Ivantsov理论计算得到的值基本吻合,相对而言,非等温凝固的模拟结果相对要比等温凝固模拟结果更接近Ivantsov理论值。
The growth rate and radius of dendrite crystal in cast Al-4.2Cu alloy were simulated by using phase field method, and compared with the Peclet value calculated by Ivantsov theory. The results show that the growth rate of dendrite tip in the solidification process of Al-4.2Cu alloy is near 0.04 m/s, and the diameter of dendrite tip is mainly distributed in 1 ×10^（-7） m. The numerical simulation of the phase field method is basically consistent with the theoretical calculation.
出处
《铸造技术》
北大核心
2017年第9期2208-2211,共4页
Foundry Technology
基金
浙江省教育厅科研项目资助(y201018366)
关键词
Al-4.2Cu
相场法
凝固组织
计算机模拟
Al-4.2Cu
phase field method
solidification structure
computer simulation
