About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Understanding the Phase Transformation Mechanisms of Fe-based Microstructures at the Atomic Scales |
Author(s) |
Avanish Mishra, Jonathan Lind, Mukul Kumar, Avinash Dongare |
On-Site Speaker (Planned) |
Avanish Mishra |
Abstract Scope |
Large-scale molecular dynamics (MD) simulations are carried out to investigate the shock-induced evolution of single-crystal Fe and Cu/Fe alloy microstructures. The shock compression of Fe leads to BCC (α) → HCP (ε) phase transformation. The shock release causes reverse ε → α phase transformation-induced twinning. The microstructure is characterized using lattice orientation, misorientations, and rotation matrices to identify the variants of ε phases under shock compression and understand the mechanisms for the formation of twins during shock release. The simulations reveal that the α → ε → α transformation-induced twinning for shock loading along [110] direction is due to a dominant [0001] ε phase variant formed during compression that rotates with the arrival of the release wave followed by reverse phase transformation to twins in the α phase. The evolution of the ε phase variant and the twinning mechanism for Fe and Cu-Fe layered microstructures will be presented. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Iron and Steel, Computational Materials Science & Engineering |