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Neutron diffraction studies of the premartensitic transformation B2 → B19′ in Ti49Ni51 single crystals

  • Solid State Physics
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Abstract

We have studied structural changes in the high-temperature B2-phase in a large single crystal at temperatures near the premartensitic transformation B2 → B19′. We are the first to observe an extra 1/2 (110) reflection in neutron diffraction patterns taken along the [110]B2 direction as the sample is cooled below 420 K, but still far from the martensite start temperature (Ms=180 K). This extra reflection heralds the formation of long-range order in atomic displacements with wave vectorq=(1/2±δ)[110]2Θ/a. Premartensitic diffraction effects (caused by the development and correlation of lattice waves of atomic displacements with wave vectorsq 1′≊2Θ/a[1/3, 1/3, 0] andq 1″≊2Θ/1[1/3, 1/3] that were clearly visible in this same single crystal before the martensitic transformation B2 → R, appeared at even lower temperatures with substantially lower intensities.

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Authors and Affiliations

  1. Institute of Metal Physics,, Rural Branch, Russian Academy of Sciences, Russia

    S. F. Dubinin, A. I. Lotkov, S. G. Teploukhov & V. N. Grishkov

  2. V.D. Kuznetsov Siberian Physico-technical Institute, Tomsk University, Russia

    S. F. Dubinin, A. I. Lotkov, S. G. Teploukhov & V. N. Grishkov

  3. Institute of Strength Physics and Materials Research, Siberian Branch of the Russian Academy of Sciences, Russia

    S. F. Dubinin, A. I. Lotkov, S. G. Teploukhov & V. N. Grishkov

Authors
  1. S. F. Dubinin
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  2. A. I. Lotkov
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  3. S. G. Teploukhov
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  4. V. N. Grishkov
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Additional information

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 1, pp. 56–61, January, 1995.

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Dubinin, S.F., Lotkov, A.I., Teploukhov, S.G. et al. Neutron diffraction studies of the premartensitic transformation B2 → B19′ in Ti49Ni51 single crystals. Russ Phys J 38, 46–50 (1995). https://doi.org/10.1007/BF00559513

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  • DOI: https://doi.org/10.1007/BF00559513

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