| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Improving Ductility of Magnesium Through Reversible Phase Transformation in bcc Mg/Nb Nanolaminates |
| Author(s) |
Youxing Chen, Nan Li, Satyesh Kumar Yadav, Xiang-yang Liu, Jian Wang, Nathan Mara |
| On-Site Speaker (Planned) |
Youxing Chen |
| Abstract Scope |
Mg alloys suffer from poor strength and ductility at room temperature, due to a lack of available slip systems in hcp structures. Our approach is to improve the strength and deformability of Mg alloys through stabilization of the bcc phase of Mg in metal laminates. Since bcc Mg can be stabilized when located between bcc Nb when the individual layer thickness is below 10 nm, the ductility is improved as bcc Mg has additional active room temperature slip systems over hcp Mg. In-situ TEM mechanical testing is a useful tool for real-time observation of deformation mechanisms at nanometer scales. Our results directly validate the hypothesis that bcc Mg can accommodate large plastic deformation and further reveal that in bcc/bcc Mg/Nb, a reversible bcc-hcp phase transformation occurs during loading and unloading. The fundamental understanding of deformation mechanisms of bcc Mg in Mg/Nb are investigated utilizing a combination of experiments and modeling. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |