alexa The Irreversible Critical Range in the TiNi Transition
Materials Science

Materials Science

Journal of Material Sciences & Engineering

Author(s): Frederick E Wang, Bernard F DeSavage, William J Buehler, William R Hosler

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Through an investigation of the transport and related thermodynamic properties of TiNi at and around its ``martensitic'' transition temperature, the existence of a critical range extending over a 60°C interval is established. Within this critical range, the phase transition is second order. Irreversibility of various properties within the critical range is interpreted in terms of irreversible shear movement of atoms. On the basis of transport data, the band structure of TiNi is inferred to be a single or ``nearly'' single positive band within the temperature range investigated. The postulate that some of the valence electrons undergo a ``covalent''→``conduction'' electronic transformation in the course of the second‐order transition is consistent in large measure with experimental data

This article was published in Journal of Applied Physics and referenced in Journal of Material Sciences & Engineering

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