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Atom positions in the R-phase unit cell in TiNi shape memory alloy

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Abstract

A crystallographic analysis of the atom positions in the unit cell of the R-phase of the TiNi shape memory alloy has been performed. In addition to a homogeneous shape change the atoms are found to shuffle in the [111]B2 and 〈−211〉B2 directions during the B2 to R-phase transformation. The origin of these shuffles is found to be a complex interaction between 〈110〉〈1–10〉 transverse acoustic and 〈111〉 longitudinal acoustic soft phonon modes.

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Authors and Affiliations

  1. Department of Materials Science and Metallurgy, University of Cambridge, CB2 3QZ, Cambridge, UK

    Q. Chen, K. M. Knowles & C. J. Humphreys

  2. Department of Materials Physics, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China

    Q. Chen & X. F. Wu

Authors
  1. Q. Chen
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  2. K. M. Knowles
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  3. C. J. Humphreys
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  4. X. F. Wu
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Chen, Q., Knowles, K.M., Humphreys, C.J. et al. Atom positions in the R-phase unit cell in TiNi shape memory alloy. JOURNAL OF MATERIALS SCIENCE 31, 4227–4231 (1996). https://doi.org/10.1007/BF00356443

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  • DOI: https://doi.org/10.1007/BF00356443

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