About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Kinetic Assessment of HCP Mg-Li-Al Alloys |
Author(s) |
David W. Christianson, Lilong Zhu, Michele V. Manuel |
On-Site Speaker (Planned) |
David W. Christianson |
Abstract Scope |
Mg-Li-Al alloys show great promise for light-weight rigid structures. However, a lack of kinetic descriptions for this system limits the capabilities of computational materials design. This work focuses on the development of a kinetic mobility database for the HCP Mg-Li-Al system using the CALPHAD method. Experimental diffusion analysis was performed using the diffusion couple process. A novel approach was taken to characterize Li diffusion profiles using a combination of Auger electron spectroscopy and inductively coupled plasma optical emission spectroscopy. Al diffusion profiles were acquired using electron probe microanalysis. The forward-simulation method was utilized to extract diffusion coefficients from experimental diffusion profiles. Mobility parameters were then optimized using the Thermo-Calc diffusion module, Diffusion Controlled TRAnsformations (DICTRA). The established mobility database was validated through comparing experimental and simulated diffusion profiles. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Computational Materials Science & Engineering, ICME |