This article is cited in 2 papers

Phase transitions

Influence of the structure of the Ti–49.8 at% Ni alloy on its thermal expansion during the martensitic phase transformation

R. I. Babicheva^a, Kh. Ya. Mulyukov^a, I. Z. Sharipov^ab, I. I. Safarov<sup>a

a</sup> Institute for Metals Superplasticity Problems of RAS, Ufa
^b Ufa State Aviation Technical University

Abstract: The temperature dependence of thermal expansion of the Ti–49.8 at% Ni alloy has been measured after rolling at temperatures of 470, 570, 670, 770, and 870 K. The maximum dilatation jump during the martensitic phase transition has been observed for the samples rolled at 570 and 670 K. A fragmented structure, in which the phase transformations are hampered, is formed during the low-temperature rolling. An increase in the rolling temperature to 770–870 K leads to the return processes and dynamic recrystallization of the material; as a result, the slope of dilatation curves changes and the range of phase transitions narrows.

Received: 27.12.2011

 English version: Physics of the Solid State, 2012, 54:7, 1480–1485

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