Effects of strain rate and temperature on yield locus for AZ31 magnesium alloy sheet

Tetsuo Naka, Masanori Hayakashi, Yasuhide Nakayama, Takeshi Uemori, Masahide Kohzu, Kenji Higashi, Fusahito Yoshida

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The yield locus of type AZ31 magnesium alloy sheet was obtained by performing biaxial tensile tests, using cruciform specimens, at temperatures of 100, 150, 200, 250 and 300°C at strain rates of 10.-2, 10. -3 and 10.-4s-1. Based on the experimental results, the effects of strain-rate and temperature on the yield locus was discussed. The size of yield locus drastically decreased with increasing temperature and decreased with decreasing strain-rate. Neither von Mises's criterion or Hill's can well predict the shape of the yield locus of this sheet metal. Instead of these quadratic yield functions, the yield criterion of Logan-Hosford or Barlat is a better choice for the accurate description of biaxial stress-strain responses at high temperature.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalKey Engineering Materials
Volume340-341 I
Publication statusPublished - 2007
Externally publishedYes


  • Biaxial tensile test
  • Mg alloy sheet
  • Strain rate
  • Temperature
  • Warm press forming
  • Yield criterion
  • Yield locus

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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