Effect of time-temperature and low-frequency acoustic treatments of the melt on the structure formation in the Al-5% Fe alloy

Regularities of the structure-formation in the Al-5% Fe alloy under conditions of time-temperature and low-frequency acoustic treatments are studied. A 500-K overheating of the melt above the liquidus temperature was found to cause a sharp change in the conditions of formation of the solid phase at the solidification front and to initiate the formation of a metastable quasi-eutectic structure. An additional low-frequency acoustic treatment increases the effect of the melt undercooling. This leads to the formation of anomalous growth forms of the solid at the lower overheatings of the melt.