| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2020
|
| Presentation Title |
In-situ TEM Investigation of <c+a> Dislocations in Magnesium |
| Author(s) |
Boyu Liu, Fei Liu, Bin Li, Jian-Feng Nie, Zhi-Wei Shan |
| On-Site Speaker (Planned) |
Jian-Feng Nie |
| Abstract Scope |
The ductility of magnesium is intimately related to c+a dislocation. Understanding the behaviors of c+a dislocation is of critical importance for rationalizing the mechanical behavior and for alloy design. By using in-situ TEM mechanical testing of pillars of pure Mg single crystal, we found that c+a dislocation can accommodate considerable plasticity through gliding on pyramidal I and II planes. We also observed cross-slip of c+a dislocation, formation of dislocation dipole, and reversible motion of the c+a dislocation. Our findings provide information on the mobility of c+a dislocation and its relationship with plasticity of pure Mg. Our experimental strategy can be extended to understanding the dislocation behaviors in other hexagonal metals. |
| Proceedings Inclusion? |
Planned: |