| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2024
|
| Presentation Title |
Suppressing Twinning in Magnesium Alloys by Atomic Scale Engineering |
| Author(s) |
Xueze Jin, Chuanyun Wang, Srdjan Milenkovic, Ilchat Sabirov, Irene Beyerlein, Maria Teresa Perez Prado |
| On-Site Speaker (Planned) |
Maria Teresa Perez Prado |
| Abstract Scope |
Twinning is a soft deformation mechanism that leads to limited strength, to mechanical anisotropy and,in particular, to strong tension-compression yield asymmetry in many wrought alloys, thus limiting their formability.
Several methods aimed at reducing the activation of twinning have been proposed. These include texture weakening by alloying with rare earths or with other large elements such as calcium, the use of alternative processing methods such as twin roll casting, or twin strengthening by solid solution, grain refinement, or precipitation. None of these methods have succeeded to fully suppress twinning.
This talk will show that a drastic reduction of the twin volume fraction can be induced by atomic segregation of Zn and Ag at matrix-particle interfaces in aged ternary Mg-Al alloys. This effect may be attributed to the decrease of the particle-matrix interface energy due to segregation, which would hinder re-nucleation at such interfaces, thus suppressing twin propagation. |
| Proceedings Inclusion? |
Planned: |