Best-fit ellipsoids of atom-probe tomographic data to study coalescence of γ′ (L12) precipitates in Ni-Al-Cr

Richard A. Karnesky*, Chantal K. Sudbrack, David N. Seidman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

An algorithm is presented to fit precipitates in atom-probe tomographic data sets as equivalent ellipsoids. Unlike previous techniques, which measure only the radius of gyration, these ellipsoids retain the moments of inertia and principle axes of the original precipitate, preserving crystallographic orientational information. The algorithm is applied to study interconnected γ′-precipitates (L12) in the γ-matrix (face-centered cubic) of a Ni-Al-Cr alloy. The precipitates are found to coagulate along 〈1 1 0〉-type directions.

Original languageEnglish (US)
Pages (from-to)353-356
Number of pages4
JournalScripta Materialia
Volume57
Issue number4
DOIs
StatePublished - Aug 2007

Keywords

  • Atom-probe tomography
  • Best-fit ellipsoid
  • Coarsening
  • Nickel alloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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