An atom probe tomography study of the oxide-metal interface of an oxide intrusion ahead of a crack in a polycrystalline Ni-based superalloy

Hiroto Kitaguchi, M.P. Moody, Hangyue Li, Hugh Evans, Mark Hardy, S. Lozano-Perez

Research output: Contribution to journalArticlepeer-review

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Abstract

ntergranular oxide intrusions formed ahead of a crack in a Ni-based superalloy at 650 °C have been examined using three-dimensional atom probe tomography. Of two scans undertaken, a thin (∼5 nm) alumina layer was observed next to the alloy substrate in one, overlaid by a chromia layer. In the second, chromia penetrated to the alloy interface. The chromia layer contained Ti in solution as well as discrete particles of TiO2.
Original languageEnglish
Pages (from-to)41-44
Number of pages4
JournalScripta Materialia
Volume97
Early online date8 Nov 2014
DOIs
Publication statusPublished - 1 Mar 2015

Keywords

  • Superalloys
  • Cracks
  • Oxide intrusions
  • High-temperature oxidation
  • Atom probe tomography

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