Abstract
The phase separation in oversaturated solid solutions Al-4.0 at.% Cu and Al-6.5 at.% Zn is accompanied by an acoustic emission (AE). The AE signals were detected in the stage of formation of the concentration inhomogeneities (Guinier-Preston zones) in the former alloy and in the early phase separation stage in the latter. There are two possible mechanisms of the AE in the course of the phase separation: (i) dynamic energy relaxation related to spontaneous motions of the interphase boundary or (ii) plastic relaxation of the elastic energy related to the nucleation of misfit dislocations at the sites of coherency breakage.
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V. A. Plotnikov, Pis’ma Zh. Tekh. Fiz. 25(13), 15 (1999) [Tech. Phys. Lett. 25, 512 (1999)].
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 27, No. 21, 2001, pp. 84–89.
Original Russian Text Copyright © 2001 by Plotnikov.
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Plotnikov, V.A. Acoustic energy dissipation during phase separation in oversaturated solid solutions. Tech. Phys. Lett. 27, 928–930 (2001). https://doi.org/10.1134/1.1424396
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DOI: https://doi.org/10.1134/1.1424396