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Anti-phase domain boundary tubes in Ni3Al

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Abstract

The mechanical behaviour of ordered alloys has caused much scientific and engineering interest1,2. The engineering interest is due to the fact that many ordered compounds, which have unusually good mechanical properties, are incorporated as dispersed particles in and contribute to the high strengths of some high performance commercial alloys (for example, Ni-base super alloys and certain Al alloys). The scientific emphasis has been directed towards understanding the physical basis of the high strengths of these materials and anomalous behaviour such as the increase in yield strength with temperature. We report here preliminary results based on transmission electron microscopy (TEM) studies of the defect structures in the compound Ni3Al which is the principal strengthening constituent of nickel-base superalloys used in gas-turbine engines: our observations confirm the existence of a new type of defect, anti-phase domain boundary tubes (APB) which we suspect may be an important contributor to the high strengths of these compounds.

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Authors and Affiliations

  1. Department of Metallurgy and Science of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, UK

    C. T. Chou & P. B. Hirsch

  2. National Physical Laboratory, Teddington, Middlesex, TW11 0LW, UK

    M. McLean & E. Hondros

Authors
  1. C. T. Chou
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  2. P. B. Hirsch
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  3. M. McLean
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  4. E. Hondros
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Chou, C., Hirsch, P., McLean, M. et al. Anti-phase domain boundary tubes in Ni3Al. Nature 300, 621–623 (1982). https://doi.org/10.1038/300621a0

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  • DOI: https://doi.org/10.1038/300621a0

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