Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe-Cu based steel

R. Prakash Kolli*, David N. Seidman

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe-Cu based steel, containing 1.12at.%Cu, aged at 550 °C or at 550°C plus 2h at 200 °C is investigated. The temporal evolution of the precipitates, heterophase interfaces, and α-Fe matrix compositions and precipitate morphology are presented. Coarsening time exponents are determined for the mean radius, (R(t)-, and number density, NV(t), and compared to the Lifshitz-Slyzov-Wagner model for coarsening, modified for concentrated multicomponent alloys by Umantsev-Olson. The experimental results indicate that (R(t)) and Nv(t) are in reasonable agreement with Umantsev-Olson model behavior. Additionally, we compare the results to earlier investigations of similar concentrated multicomponent steels containing 1.82 at.% Cu and 1.17 at.% Cu, aged at 500 °C.

Original languageEnglish (US)
Pages (from-to)1115-1124
Number of pages10
JournalInternational Journal of Materials Research
Volume102
Issue number9
DOIs
StatePublished - Oct 5 2011

Keywords

  • Atom-probe tomography
  • Coarsening
  • Fe-Cu alloys
  • Phase separation
  • Precipitation

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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