Abstract
The effect of multidirectional pre-compression on the tension-compression asymmetry in a hot-rolled Mg-3Al-1Zn alloy is investigated in the present paper, revealing that the tension-compression asymmetry is greatly decreased via multidirectional pre-compression. The analysis of deformation behaviors through in situ EBSD observation demonstrates that the {101-2}-{101-2} double twins could be generated in the previously formed {101-2} twins and the existing {101-2}-{101-2} double twins could be de-twinned to the {101-2} twins under favorable orientations. De-twinning could happen through the movement of the boundaries and the nucleation of new lamellas. In addition, the {101-2}-{101-2}-{101-2} twins are difficult to occur in narrow {101-2}-{101-2} twins under low stresses, causing de-twinning to also happen in the double twins even though their orientation facilitates the activation of {101-2}-{101-2}-{101-2} twinning.
| Original language | English |
|---|---|
| Pages (from-to) | 96-101 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering: A |
| Volume | 565 |
| DOIs | |
| Publication status | Published - 10 Mar 2013 |
| Externally published | Yes |
Keywords
- Extension twinning
- Magnesium alloy
- Texture
- Yield asymmetry