| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
K-9: Ex-situ and In-situ X-ray Studies of Crystal Structure and Microstructure Evolution in Metallic Alloys Under Extreme Environments |
| Author(s) |
Tamas Varga, Bharat Gwalani, Arun Devaraj |
| On-Site Speaker (Planned) |
Tamas Varga |
| Abstract Scope |
Exposure to extreme environments (high pressure/shear, gas) alters both the surface and bulk structure of metallic alloys. To better understand such crystal and microstructure changes, we combined in-house x-ray capabilities with those at synchrotrons to investigate the evolution of crystal and microstructures of alloys under pressure/shear/gas flow. Laboratory XRD was used for ex situ characterization of alloys (Al-Si, Cu-Nb, Cu-Ni), and in situ studies of Zircalloy under H2/O2 exposure. In situ synchrotron XRD experiments were carried out on these alloys while compressed in a diamond anvil cell (shear added). X-ray tomography experiments were carried out for 3D structural information on the changes occurring on the microscale during processing. Our x-ray characterization was complemented with electron microscopy and atom probe tomography. The combination of all these techniques provided a more complete picture of phase and microstructure changes that follow the above processing of metallic alloys and influence their mechanical properties. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |