Thermal stability of ultrafine-grained aluminum in the presence of Mg and Zr additions

Hideaki Hasegawa, Shogo Komura, Atsushi Utsunomiya, Zenji Horita, Minoru Furukawa, Minoru Nemoto, Terence G. Langdon

Research output: Contribution to journalArticlepeer-review

184 Citations (Scopus)

Abstract

Superplastic deformation occurs at high temperatures and requires the presence of a very small grain size. Experiments demonstrate that equal-channel angular (ECA) pressing is capable of introducing ultrafine grain sizes in pure Al, Al-Mg and Al-Zr alloys, with grain sizes lying in the sub-micrometer range for the alloys. It is shown by static annealing that these ultrafine grain sizes are not stable in pure Al and the Al-Mg alloys at elevated temperatures but in the Al-Zr alloys the grains remain small up to temperatures of ≈600 K.

Original languageEnglish
Pages (from-to)188-196
Number of pages9
JournalMaterials Science and Engineering A
Volume265
Issue number1-2
DOIs
Publication statusPublished - Jun 15 1999

All Science Journal Classification (ASJC) codes

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

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