Specific Features of the Thermoelastic Martensitic
Transformation in the CuZnAlV Alloy Undergoing
the Decomposition of the Solid Solution

V. I. Zel’dovich, I. V. Khomskaya, N. Yu. Frolova, V. M. Gundyrev, and L. V. Elokhina

Institute of Metal Physics, Ural Division, Russian Academy of Sciences,
ul. S. Kovalevskoi 18, Ekaterinburg, 620219 Russia

Received November 26, 1996

Abstract—Methods of dilatometry, optical microscopy, X-ray diffraction, and electron microprobe were used
to study the effects of different stages of solid solution decomposition and the associated redistribution of
alloy components on the thermoelastic martensitic transformation in the Cu–18.4 Zn–6.3 Al–0.1 V (wt %) alloy.
The redistribution of zinc, aluminum, and copper due to the precipitation of and ₂ phases during the decom-
position of the high-temperature phase was studied in some detail. The control of the critical temperatures, as
well as of the hysteresis, value, and sign of dilatometric effects, was shown to be possible through the control-
ling of the (partial) decomposition of the matrix phase with the formation of rodlike -phase particles or plate-
type bainite crystals. The experimental data confirming the concept of the heterogeneous nucleation of marten-
site in the alloy studied are presented.

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