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INFLUENCE OF INITIAL STATE AND HEAT TREATMENT CONDITIONS ON THE STRUCTURE OF RAPIDLY-QUENCHED TiNiCu ALLOY

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Abstract

Amorphous-crystalline alloy of the TiNi–TiCu quasi-binary system with 25 at.% copper content is prepared in the form of thin ribbons by rapid quenching from a liquid state. Completely amorphous ribbons are obtained using electrochemical polishing. It is shown that the crystal structure prepared by high-speed electropulsing heat treatment differ significantly from that prepared by isothermal heat treatment. The initial ribbon crystallizes as column-like crystals growing from both surfaces of the ribbon and as large lens-like crystals in the volume of the ribbon. The structure of column-like crystals reproduces the morphology and texture of the original crystalline layer. Reducing the electropulsing time to 1 ms increases the fraction of column-like crystals while their height increases and the width decreases. After the amorphous ribbon is crystallized, the structures of column-like crystals on both surfaces have similar crystallographic orientations.

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Funding

The study was funded by Russian Science Foundation (project No. 19-12-00327).

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Authors and Affiliations

  1. National Research Nuclear University MEPHI, Moscow, Russia

    A. A. Dyadechko, I. A. Zaletova, A. V. Shelyakov, N. N. Sitnikov & K. A. Borodako

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  1. A. A. Dyadechko
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  2. I. A. Zaletova
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  3. A. V. Shelyakov
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  4. N. N. Sitnikov
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  5. K. A. Borodako
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Correspondence to A. A. Dyadechko.

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The authors declare that they have no conflict of interests.

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Russian Text © The Author(s), 2021, published in Zhurnal Strukturnoi Khimii, 2021, Vol. 62, No. 4, pp. 694-700.https://doi.org/10.26902/JSC_id71178

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Dyadechko, A.A., Zaletova, I.A., Shelyakov, A.V. et al. INFLUENCE OF INITIAL STATE AND HEAT TREATMENT CONDITIONS ON THE STRUCTURE OF RAPIDLY-QUENCHED TiNiCu ALLOY. J Struct Chem 62, 651–657 (2021). https://doi.org/10.1134/S002247662104017X

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  • DOI: https://doi.org/10.1134/S002247662104017X

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