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Evolution of Elastic Properties of Ti and Its Alloys due to Severe Plastic Deformation

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Abstract

The paper analyzes how the elastic properties of titanium and its alloys vary as their structure is transformed from coarse- to ultrafine-grained under severe plastic deformation. The analysis includes acoustic measurements of the elastic modulus of Ti materials with a piezoelectric composite oscillator over a wide amplitude range, a detailed examination of their microstructure by electron microscopy and electron backscatter diffraction, and estimations of their nanoporosity by small-angle X-ray scattering and their density by precision weighing before and after applying a high hydrostatic pressure (1.5 GPa). The results of the analysis show that such structural transformations can cause a noticeable change in the elastic properties of Ti materials due to dislocations, nanoporosity, high internal stress, and initial grain structure.

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Funding

The work was supported by RFBR (project No. 18-08-00360).

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Authors and Affiliations

  1. Ioffe Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia

    B. K. Kardashev, M. V. Narykova, V. I. Betekhtin & A. G. Kadomtsev

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  1. B. K. Kardashev
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  2. M. V. Narykova
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  3. V. I. Betekhtin
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  4. A. G. Kadomtsev
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Correspondence to M. V. Narykova.

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Russian Text © The Author(s), 2019, published in Fizicheskaya Mezomekhanika, 2019, Vol. 22, No. 3, pp. 71–76.

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Kardashev, B.K., Narykova, M.V., Betekhtin, V.I. et al. Evolution of Elastic Properties of Ti and Its Alloys due to Severe Plastic Deformation. Phys Mesomech 23, 193–198 (2020). https://doi.org/10.1134/S1029959920030029

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