Al-Cu共晶合金定向凝固不同抽拉速度下的组织演化

王狂飞; 王有超; 历长云; 崔宏保; 米国发

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Al-Cu共晶合金定向凝固不同抽拉速度下的组织演化
Effects of Different Pulling Velocity on Microstructure Evolution in Directionally Solidified Al-Cu Eutectic Alloy
2010年30卷第9期页码：785-787
纸质出版日期： 2010 ，
DOI：

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[1]王狂飞,王有超,历长云,崔宏保,米国发.Al-Cu共晶合金定向凝固不同抽拉速度下的组织演化[J].特种铸造及有色合金,2010,30(09):785-787+777.

Wang Kuangfei, Wang Youchao, Li Changyun, et al. Effects of Different Pulling Velocity on Microstructure Evolution in Directionally Solidified Al-Cu Eutectic Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(9):785-787.
[1]王狂飞,王有超,历长云,崔宏保,米国发.Al-Cu共晶合金定向凝固不同抽拉速度下的组织演化[J].特种铸造及有色合金,2010,30(09):785-787+777. DOI：

Wang Kuangfei, Wang Youchao, Li Changyun, et al. Effects of Different Pulling Velocity on Microstructure Evolution in Directionally Solidified Al-Cu Eutectic Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(9):785-787. DOI：

摘要

研究了Al-Cu共晶合金定向凝固下的组织演化规律。结果表明

在一定的温度梯度下

随着凝固速度的增加

共晶层片间距因Al2Cu分叉而发生细化。在定向凝固过程中

层片间距的调整是通过纵向生长上的分叉和横向上的错配边界移动实现的

共晶组织达到稳态的过程是纵向和横向不断调整的过程。

Abstract

Microstructure evolution of Al-Cu eutectic alloy in directional solidification was observed. The results reveal that at a given temperature gradient

with increasing in pulling velocity

eutectic lamellar spacing is decreased as a result of bifurcation of Al2Cu phase. During directional solidification process

adjustment of eutectic lamellar spacing is realized through bifurcation in longitudinal growth and mismatched boundary movement in the horizontal direction

and eutectic microstructure tends toward stable through continuous adjustment in longitudinal and horizontal directions.