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Microstructure and plastic deformation of orthorhombic titanium aluminides Ti2AlNb. III. Formation of transformation twins upon the B2 → O phase transformation

  • Structure, Phase Transformations, and Diffusion
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Abstract

X-ray diffraction and transmission electron microscopy were used to study the O-phase formation in the Ti-25.6% Al-13.9% Nb-0.3% Mo-0.3% Zr alloy upon the B2 → O phase transformation. The formation of pseudotwins is shown to be possible in the B2 phase in the Ti-Al-Nb alloys. It is found that the O phase upon the B2 → O phase transformation does not undergo twinning, and all twins observed in the alloy belong to the intermediate metastable B19 phase. The orthorhombic O phase is formed upon ordering inside the B19-phase twins and save their boundaries.

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Authors and Affiliations

  1. Institute of Metal Physics, Ural Division, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Ekaterinburg, 620041, Russia

    N. V. Kazantseva

  2. Ural State Technical University, ul. Mira 19, Ekaterinburg, 620002, Russia

    S. L. Demakov & A. A. Popov

Authors
  1. N. V. Kazantseva
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  2. S. L. Demakov
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  3. A. A. Popov
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Original Russian Text © N.V. Kazantseva, S.L. Demakov, A.A. Popov, 2007, published in Fizika Metallov i Metallovedenie, 2007, Vol. 103, No. 4, pp. 395–405.

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Kazantseva, N.V., Demakov, S.L. & Popov, A.A. Microstructure and plastic deformation of orthorhombic titanium aluminides Ti2AlNb. III. Formation of transformation twins upon the B2 → O phase transformation. Phys. Metals Metallogr. 103, 378–387 (2007). https://doi.org/10.1134/S0031918X07040102

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  • DOI: https://doi.org/10.1134/S0031918X07040102

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