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 language | English |
|---|---|
| Pages (from-to) | 119-124 |
| Number of pages | 6 |
| Journal | Key Engineering Materials |
| Volume | 340-341 I |
| DOIs | |
| Publication status | Published - 2007 |
| Externally published | Yes |
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