Influenced by the alternating current field, except that a little of eutectic iron-phase still is the acicular structure, the most of eutectic iron-phase of the Al-20Si-5Fe-Mn alloy is refined into tiny particles which is segregated.

• 在凝固过程中，对合金熔体施加交流电场，Al-20Si-5Fe-xMn合金中少量的共晶富铁相仍为细长的针片状，大部分共晶富铁相转化为细小的颗粒状，出现局部偏聚的现象。