Electron tomography imaging and analysis of γ′ and γ domains in Ni-based superalloys

Satoshi Hata, Kosuke Kimura, Hongye Gao, Syo Matsumura, Minoru Doi, Tomokazu Moritani, Jonathan S. Barnard, Jenna R. Tong, Jo H. Sharp, Paul A. Midgley

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Abstract

A study was conducted to perform 3D microstructural analysis based on electron tomography. The study also attempted to investigate a unique domain structure in a Ni-Al-Ti alloy. A two-phase microstructure,composed of L1 2-ordered γ domains with cuboidal shape and an A1-disordered γ matrix exhibited secondary phase separation during aging precipitation of fine γ in each domain. A variety of precipitation behaviors and microstructural evolutions were observed in the second stage of phase separation, depending on on the alloy composition. The study also demonstrated tomographic DFTEM and EFTEM observations, to clarify the 3D morphology of the γ precipitates and compositional distribution in the phase-separated microstructure.

Original languageEnglish
Pages (from-to)1905-1909
Number of pages5
JournalAdvanced Materials
Volume20
Issue number10
DOIs
Publication statusPublished - May 19 2008

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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    Hata, S., Kimura, K., Gao, H., Matsumura, S., Doi, M., Moritani, T., Barnard, J. S., Tong, J. R., Sharp, J. H., & Midgley, P. A. (2008). Electron tomography imaging and analysis of γ′ and γ domains in Ni-based superalloys. Advanced Materials, 20(10), 1905-1909. https://doi.org/10.1002/adma.200702461