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The Effect of Thermomechanical Treatment on the Structure and Mechanical Properties of the Ti49.5Ni50.5 Shape-Memory Alloy

  • STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION
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Abstract

The effect of thermomechanical treatment on the structure and phase transformations of the Ti–50.5 at % Ni shape-memory alloy was studied. The data on the specific features of mechanical properties and character of fracture in the initial ultrafine-grained (UFG) alloy were gained by tension tests in combination with optical and electron microscopy and X-ray diffraction analysis. The UFG alloy structure was created by multipass plastic rolling deformation. The alloy was established to have high levels of its mechanical properties (ultimate strength of up to 1400 MPa at a relative elongation of more than 25%) due to the revealed effect of a complex reaction: recrystallization with the formation of a UFG structure and associated highly dispersed heterogeneous decomposition.

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ACKNOWLEDGMENTS

This study was carried on the scientific equipment of the Collaborative Access Center of the Institute of Metal Physics (Ural Branch, Russian Academy of Sciences).

Funding

This study was performed within the framework of state assignment (code “Structure”) (grant no. 122021000033-2) to the Institute of Metal Physics (Ural Branch, Russian Academy of Sciences).

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Authors and Affiliations

  1. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620108, Ekaterinburg, Russia

    N. N. Kuranova, V. V. Makarov & V. G. Pushin

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  1. N. N. Kuranova
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  2. V. V. Makarov
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  3. V. G. Pushin
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Correspondence to V. G. Pushin.

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Translated by E. Glushachenkova

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Kuranova, N.N., Makarov, V.V. & Pushin, V.G. The Effect of Thermomechanical Treatment on the Structure and Mechanical Properties of the Ti49.5Ni50.5 Shape-Memory Alloy. Phys. Metals Metallogr. 123, 996–1003 (2022). https://doi.org/10.1134/S0031918X22600993

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  • DOI: https://doi.org/10.1134/S0031918X22600993

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