Model for creep threshold stress in precipitation-strengthened alloys with coherent particles

Emmanuelle A. Marquis, David C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

The general climb model for creep threshold stress in precipation-strengthened alloys was discussed. The model depicts that at low strain rates, where climb-bypass is active, large precipitate sizes are beneficial, provided that coherency is maintained. The alloy strength was estimated using mean square lattice spacing for the interparticle distance beacause of the random distribution of precipitates. The results showed that the model agrees with experimental data for the Al-Sc system.

Original languageEnglish (US)
Pages (from-to)503-508
Number of pages6
JournalScripta Materialia
Volume47
Issue number8
DOIs
StatePublished - Oct 2002

Keywords

  • Aluminum alloys
  • Creep
  • Dislocation mobility
  • Precipitation strengthening
  • Threshold stress

ASJC Scopus subject areas

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

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