Atomic structure of high-index α2m boundaries in a Ti-46.54 at.%Al alloy

W. T. Reynolds, J. F. Nie, W. Z. Zhang, J. M. Howe, H. I. Aaronson, G. R. Purdy

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Planar, high-index interphase boundaries developed during the α→γm transformation in a Ti-46.54% Al alloy were re-examined with a 3-D near-coincidence site analysis. Pairs of low-index planes, fulfilling the Zhang and Purdy [Philos. Magn. A 68 (1993) 279] minimum mismatch criterion, meet along their edges. Atoms at these edges commingle almost linearly, thereby producing a kinetic barrier to boundary migration.

Original languageEnglish
Pages (from-to)405-409
Number of pages5
JournalScripta Materialia
Issue number5
Publication statusPublished - 1 Sept 2003


  • Coherency
  • Edge-to-edge
  • Incoherent
  • Interfacial energy
  • Near coincidence site

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