About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Phase Transformation of Aluminum under Ramp Loading Compression; A Combined Atomistic Simulation and Experimental Study |
Author(s) |
Lijie He, Danae Polsin, Shuai Zhang, Gilbert Collins, Niaz Abdolrahim |
On-Site Speaker (Planned) |
Niaz Abdolrahim |
Abstract Scope |
In this study, we carried out a series of NEMD simulations to investigate the plastic deformation properties of Aluminum under ramp loading conditions where it fcc-hcp-bcc phase transitions. An excellent agreement is observed in stress-density response between previously published laser-driven ramp compression experiments and simulation results. The atomistic configurations and virtual diffraction analysis demonstrated a plastic deformation route of micro twin formation->stacking fault formation and thickening->phase transformation via Bain path. Furthermore, the virtual XRD patterns are compared with experimental in-situ XRD results and showed remarkable similarity in the fcc and bcc signature at comparable stresses. The proposed phase transformation path is also cross-examined with the experimental diffraction result and showed perfect agreement. |
Proceedings Inclusion? |
Planned: |