Abstract
Acoustic emission (AE) is experimentally investigated when the temperature of the aluminum melt changes. The Fourier analysis is carried out of the amplitude-frequency spectrum of AE signals in the temperature range of 665-860 ° C In the studied frequency range, periodic repetition of signals with maximum intensity was established. It is assumed that the acoustic spectrum of the signals is associated with structural rearrangements in the melt and reflects the transformation of the local order in liquid aluminum. Dynamics of changes in the intensity of AE signals with an increase in the melt temperature suggests that the local order in the melt inherits the structure of the crystalline precursor. The paper analyzes the process of cluster formation during melt cooling. Based on the above, the concepts of the melt structure as a partially ordered cluster environment are discussed.
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