About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Understanding Pseudomorphic bcc Mg Under Extreme Conditions of Pressure, Temperature and High Strain Rates |
Author(s) |
Manish Jain, Rajaprakash Ramachandramoorthy, Marko Knezevic, Nenad Velisavljevic, Nathan A. Mara, Irene J. Beyerlein, Johann Michler, Siddhartha Pathak |
On-Site Speaker (Planned) |
Manish Jain |
Abstract Scope |
We study the response of body centered cubic (bcc) Mg under extreme conditions of pressure, temperature and strain rate. Bcc Mg was stabilized at ambient pressures in an Mg/Nb multilayer nanocomposite where the adjacent Mg/Nb interfaces are spaced within a few nanometers. We investigate the structure of the unknown bcc Mg phase within the nanocomposite under high pressures in a diamond anvil cell experiment using synchrotron radiation x-ray diffraction (XRD). Additionally, we perform high temperature micro-pillar compression tests and strain rate jump tests on Mg (bcc)/Nb 5nm/5nm and Mg (hcp)/Nb 50nm/50nm nanolaminates to compare the responses of hcp vs. bcc Mg. Results from these tests are analyzed in terms of the measured activation energies and activation volumes from sub-micrometer sized Mg/Nb multilayer nanocomposites. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |