Solids

Dissipative processes during the nonequilibrium phase transformations in martensitic thermoelastic alloys

T. A. Shakhnazarov^a, I. K. Kamilov^a, A. B. Sinani^b, T. Luguyev<sup>a

a</sup> Daghestan Institute of Physics after Amirkhanov
^b Ioffe Institute, St. Petersburg

Abstract: Martensitic thermoelastic transformations are considered under nonequilibrium conditions, where a system nonmonotonically tends toward a stationary process. The specific features of a phase transformation are experimentally studied on molecular models under these nonequilibrium conditions. A resonance mode of the phase transformation, which can increase the process rate by an order of magnitude without increasing the heat source temperature, is found. The dissipative processes that occur under the monotonic and resonance conditions of martensitic thermoelastic transformations are estimated. The resonance mode is shown to be accompanied by negative entropy production and to demonstrate the self-organization of the system. These results can be used to design materials and techniques for the processing of low-potential heat sources.

Received: 27.04.2009
Accepted: 19.01.2010

 English version: Technical Physics, 2010, 55:7, 946–952

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