在铝合金半连续铸锭的宏观金相组织中,有时可见到许多平行、连续的羽毛状薄片组成的大晶粒(图1)。它是一种既不同于等轴晶,又不同于柱状晶的特殊晶粒,其形状像羽毛,故称为羽毛状晶,这种组织有时局部存在,有时分布在整个铝合金铸锭的截面上。羽毛状晶具有某些独特的性 In the macroscopic microstructure of aluminum alloy semi-continuous ingot, sometimes a large number of large, continuous, feather-like flakes can be seen (Figure 1). It is a different from the equiaxed grains, but also different from the columnar grains of special grains, the shape of feathers, it is called feather-shaped crystals, this organization sometimes exists locally, and sometimes distributed throughout the aluminum alloy ingot section on. Feathered crystal has some unique properties