Investigation of the structural heterogeneity of the aluminum melt by the method of acoustic emission
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.
Keywords
crystal structure,
growth model,
gradient,
alloys,
metals,
acoustic emissionAuthors
| Vorontsov V.B. | Ural State Railway University of Railway Transport | vadimalumin2013@ya.ru |
| Pershin V.K. | Ural State Railway University of Railway Transport | vpershin@usurt.ru |
Всего: 2
References
Ватолин Н.А., Пастухов Е.А., Сермягин В.Н. // ДАН СССР. - 1975. - Т. 222. - № 3. - С. 641.
Bazin Y.A., Zamyatin V.M., Nasayrov Y.A., Yemel’yanov Y.A. // Metallurgiya. - 1982. - No. 5. - P. 28-32 (in Russian).
Bazin Yu.A., Yemel’yanov A.V., Baum B.A. // Metallofizikap. - 1986. - V. 8. - No. 2. - P. 11-15 (in Russian).
Huang Y.H., Bau H.H. //j. Heat Mass Transfer. - 1995. - V. 38. - P. 1329-1345.
Huang Y.Y., Bau H.H. //j. Heat Mass Transfer. - 1997. - V. 40. - No. 2. - Р. 407-419.
Zubkov P.T., Sviridov E.M., Gubaydulin A.A. // High Temperature Thermophys. - 2004. - V. 42. - No. 5. - P. 753-759.
Френкель Я.И. Кинетическая теория жидкостей. - Л.: Наука, 1975.
Френкель Я.И. Введение в теорию металлов. - Л.: Наука, 1972.
Danilov V.I. Structure and Crystallization of Liquids. - Kiev: USSR Academy of Sciences, 1956. - 566 р. (in Russian).
Александров В.Д., Фолова С.А., Зозуля А.П. // Металлические конструкции. - 2019. - Т. 25. - № 1. - C. 5-15.
Ladjnov V.I. Structural transformations in metallic melts and their manifestation during the solidification and crystallization of rapidly quenched alloys: D. Dis, 2004. - 300 p.
Vorontsov V.B., Zhuravlev D.V. // J Chem. Eng. - 2012. - V. 6.
Vorontosov V.B., Zhuravlev D.V., Cherepanov A.C. //j. Crystal. - 2014. - V. 402. - Р. 124-127.
Vorontsov V.B., Pershin V.K. //j. Cryst. Growth. - 2016. - V. 10. - P. 7-12.
Sokolov O.B., Ugodnikova L.A. // Textbook of method. - Ekaterinburg, 2005. - 5 p.
Computer Program ISVI. Instrumental Systems. - Moscow: Tаchnology Corporation, 2009.
