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

Analysis of the refinement and coalescence of solid particles during low-frequency treatment of metal melts

“…A prolonged vibration treatment up to 30 min led to coarsening of the intermetallic compounds up to 12 μm or more [2]. A similar trend in a change in the aluminide size was observed in all experiments on LFT of an Al-5 wt % Fe melt carried out at 930, 1100, and 1200°C [3].…”

“…Such a vibrational treatment is known [1] to generate periodic pressure changes in the melt volume and to provide its turbulent mixing. When conducting experiments on low frequency treatment of alumi num melts with admixed powder particles of various metals (e.g., Al-Nb, Al-W [2], Al-Fe [3] in the solid-liquid field), it was noted that LFT refines pow der particles and the aluminides formed by them to a size of several micrometers. Then, refinement is fol lowed by particles' coalescence and the formation of conglomerates.…”