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Thickness of grain-boundary liquid phase and its effect on the mechanism of superplastic deformation

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Abstract

For a series of matrix aluminum alloys, an estimation of the thickness of the grain-boundary liquid phase under the optimum conditions of the manifestation of high-temperature superplasticity has been performed. It has been established that the contribution of grain-boundary sliding to the total deformation under these conditions is determining. It has been shown that the greater values of the thickness of the grain-boundary liquid phase correspond to greater values of the parameter m of the strain-rate sensitivity of the flow stress. The obtained dependences of the thickness of the grain-boundary liquid phase on m indicate that with increasing amount of the liquid phase the grain-boundary sliding progressively acquires features of viscous flow.

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Authors and Affiliations

  1. Institute of Electrophysics and Radiation Technologies, National Academy of Sciences of Ukraine, ul. Chernyshevskogo 28, Kharkov, 61002, Ukraine

    V. V. Bryukhovetskii, A. V. Poida & Yu. V. Kolomak

  2. Kharkov National University, pl. Svobody 4, Kharkov, 61077, Ukraine

    V. P. Poida

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  1. V. V. Bryukhovetskii
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  2. A. V. Poida
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  3. V. P. Poida
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  4. Yu. V. Kolomak
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Original Russian Text © V.V. Bryukhovetskii, A.V. Poida, V.P. Poida, Yu.V. Kolomak, 2011, published in Fizika Metallov i Metallovedenie, 2011, Vol. 112, No. 5, pp. 552–560.

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Bryukhovetskii, V.V., Poida, A.V., Poida, V.P. et al. Thickness of grain-boundary liquid phase and its effect on the mechanism of superplastic deformation. Phys. Metals Metallogr. 112, 526–533 (2011). https://doi.org/10.1134/S0031918X11030173

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