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 journalArticle

3 Citations (Scopus)

Abstract

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
DOIs
Publication statusPublished - Jan 1 2007

Keywords

  • 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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  • Cite this

    Naka, T., Hayakashi, M., Nakayama, Y., Uemori, T., Kohzu, M., Higashi, K., & Yoshida, F. (2007). Effects of strain rate and temperature on yield locus for AZ31 magnesium alloy sheet. Key Engineering Materials, 340-341 I, 119-124. https://doi.org/10.4028/0-87849-433-2.119