| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
|
| Presentation Title |
Rate-dependent Transition of Dislocation Mechanisms in a Magnesium Alloy |
| Author(s) |
Xinyu Xu, Y.Z. Li, C.P. Huang, M.X. Huang |
| On-Site Speaker (Planned) |
Xinyu Xu |
| Abstract Scope |
The limited slip systems of magnesium (Mg) and its alloys hamper their widespread applications in key areas. Here, to obtain a better understanding of the plastic deformation mechanisms of Mg alloys, we performed tensile straining over a wide range of strain rates from 10−5 s−1 up to 2000 s−1, revealing for the first time the occurrence of a rate-dependent transition of the dislocation mechanisms. Systematic experimental characterizations, such as transmission electron microscopy under two-beam conditions and synchrotron X-ray diffraction analysis, were employed to analyze both qualitatively and quantitatively the characteristics of dislocations at changing strain rates, revealing that the rate-dependent dislocation mechanisms are accompanied by the change of dislocation activities from easy-glide a dislocations to glissile c + a dislocations with increasing strain rates. We expect that these results will contribute to a further understanding of the plasticity mechanisms of Mg alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Characterization, Other |