A subnanoscale study of the nucleation, growth, and coarsening kinetics of Cu-rich precipitates in a multicomponent Fe-Cu based steel

R. Prakash Kolli, Ryan M. Wojes, Stephanie Zaucha, David N Seidman

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

The nucleation, growth, and coarsening kinetics of Cu-rich precipitates in a multicomponent Fe-Cu based steel, containing 1.17 at.% Cu, aged at 500 °C for up to 1024 h are investigated. The temporal evolution of the precipitate, heterophase interface, matrix compositions and precipitate morphology are presented. Coarsening temporal exponents are determined for mean radius, (R(t)), number density, Nv(t), and supersaturations, and are compared to the Lifshitz-Slyzov-Wagner model for coarsening, modified for multicomponent alloys by Umantsev and Olson. The experimental results indicate that the alloy does not strictly follow Umantsev -Olson model behavior. Additionally, we compare the results to an investigation of a similar multicomponent steel containing 1.82 at.% Cu and to results in the literature. Furthermore, we present a Thermo-Calc determined phase diagram.

Original languageEnglish (US)
Pages (from-to)513-527
Number of pages15
JournalInternational Journal of Materials Research
Volume99
Issue number5
DOIs
StatePublished - May 1 2008

Keywords

  • Atom-probe tomography
  • Coarsening
  • Fe-Cu alloy
  • Growth
  • Nucleation

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'A subnanoscale study of the nucleation, growth, and coarsening kinetics of Cu-rich precipitates in a multicomponent Fe-Cu based steel'. Together they form a unique fingerprint.

  • Cite this