Creep resistance of cast and aged Al-0.1Zr and Al-0.1Zr-0.1Ti (at.%) alloys at 300-400 °C

Keith E. Knipling*, David C. Dunand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

Cast and aged Al-0.1Zr and Al-0.1Zr-0.1Ti (at.%) alloys, upon compressive creep deformation at 300-400 °C, exhibit threshold stresses attributable to climb-controlled bypass of coherent Al3Zr and Al3(Zr1-xTix) precipitates. Al-0.1Zr-0.1Ti exhibits a smaller threshold stress than Al-0.1Zr, which is attributed principally to a reduced lattice parameter mismatch between the Al3(Zr1-xTix) precipitates and the matrix. The present alloys are less creep resistant than Al-Sc and Al-Sc-Zr/Ti alloys with similar precipitate radii and volume fractions.

Original languageEnglish (US)
Pages (from-to)387-390
Number of pages4
JournalScripta Materialia
Volume59
Issue number4
DOIs
StatePublished - Aug 2008

Keywords

  • Aluminum alloys
  • Creep
  • Precipitation strengthening
  • Titanium
  • Zirconium

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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