| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
On the hcp-bcc Phase Transformation in Magnesium Shock Compressed up to 60 GPa |
| Author(s) |
Cyril Williams, Nicholas Lorenzo |
| On-Site Speaker (Planned) |
Cyril Williams |
| Abstract Scope |
The phase diagram of magnesium was investigated by Stinton et al. [1] up to 221 GPa at 300 K and to 105 GPa at 4500 K respectively using DACs in combination with XRD, resistive and laser heating. Between 46-50 GPa at 300 K, they observed the onset of the hcp to bcc phase transformation. They found the bcc phase to be stable up to 221 GPa. However, the same was not true when AZ31B-H24 magnesium was shock compressed to approximately 60 GPa at the Dynamic Compression Sector (DCS). The XRD results did not reveal any hcp-bcc phase transformation when the AZ31B-H24 magnesium was shock compressed to approximately 60 GPa but the solid phase changes to liquid perhaps due to temperature rise in the material.
[1] Stinton, G. W. et al. “Phase Diagram and Equation of State of Magnesium to High Pressures and High Temperatures.” Livermore, CA (United States), 2014. |
| Proceedings Inclusion? |
Undecided |