Copper precipitation in cobalt-alloyed precipitation-hardened stainless steel

Arpana S. Murthy*, Julia E. Medvedeva, Dieter Isheim, Simon L. Lekakh, Von L. Richards, David C. Van Aken

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The influence of cobalt addition on precipitation of copper in a high-strength stainless steel was investigated using three-dimensional atom probe tomography. A decrease in copper precipitate size with narrowed distribution was observed in cobalt-containing steel. The concentration profile across the precipitate-matrix interface indicated rejection of cobalt atoms from the copper precipitates. This behavior was explained with first-principles calculations using energy-minimization criterion.

Original languageEnglish (US)
Pages (from-to)943-946
Number of pages4
JournalScripta Materialia
Volume66
Issue number11
DOIs
StatePublished - Jun 2012

Keywords

  • 3DAP
  • Casting
  • First-principle electron theory
  • Precipitation
  • Stainless steels

ASJC Scopus subject areas

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

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