Al-40%Cu合金定向凝固过程中的微观组织分析  

Analysis on Microstructure of Al-40%Cu Alloy in Directional Solidification Process

作　　者：程茂[1] 

机构地区：[1]河北农业大学科技管理处,河北保定071001

出　　处：《铸造技术》2014年第10期2364-2366,共3页Foundry Technology

摘　　要：采用连续切片技术对Al-40%Cu过共晶合金在定向凝固过程中初生Al2Cu相的三维微观组织进行了研究,探讨了三维共晶组织在定向凝固速率跃迁条件下的演变机制和间距调节机制。结果表明:A1-40%Cu合金在定向凝固过程中,抽拉速率发生跃迁后,三维共晶组织中的层片组织转变为棒状组织,共晶组织是通过三维空间下非同一平面的分叉和分枝行为连续调整组织间距。The 3D microstructure of nascent phase A12Cu in A1-40%Cu hypereutectic alloys in the directional solidification process was studied by serial sectioning technique, and the evolution mechanisms and pitch adjustment mechanism of 3D eutectic microstructure tender solidification rate transition condition were explored. The results show that, in directional solidification process, the lamellar microstructure into a rod-like microstructure of A1-40% Cu alloy in 3D eutectic microstructure after the withdrawal rate transition, and the eutectic microstructttre adjust the structure pitch by bifurcate and branching behavior of non-conplane in 3D.

关 键 词：计算机模拟 三维微观组织 定向凝固 

分 类 号：TG146.21[一般工业技术—材料科学与工程]