Temporal evolution of the γ(fcc)/γ′(L12) interfacial width in binary Ni-Al alloys

Elizaveta Y. Plotnikov, Zugang Mao, Ronald D. Noebe, David N. Seidman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

The temporal evolution of γ′(L12 structure) precipitates is studied in Ni-12.5 at.% Al and Ni-13.4 at.% Al alloys, aged at 823 and 873 K, utilizing three-dimensional atom-probe tomography. The values of the interfacial widths, δ(t)s, between the γ(face-centered cubic) and γ′ phases are calculated utilizing proximity histograms. It is demonstrated that δ(t) decreases continuously with increasing aging time for both Ni-Al alloys: that is, the δ(t)s decrease with increasing mean precipitate radius, 〈R(t)〉. The ratio δ(t)/〈R(t)〉 decreases, to first order, as 〈R(t)〉-1.

Original languageEnglish (US)
Pages (from-to)51-54
Number of pages4
JournalScripta Materialia
Volume70
Issue number1
DOIs
StatePublished - Jan 1 2014

Keywords

  • Atom-probe tomography
  • Interfacial width
  • Nickel-aluminum alloys
  • Vacancy-mediated lattice kinetic Monte Carlo simulations

ASJC Scopus subject areas

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

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