About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VII
|
Presentation Title |
Interaction of < a > Prismatic Screw Dislocations with the α-β Interface Side Face in α-β Ti Alloys |
Author(s) |
Ali Rida, Satish I. Rao, Jaafar A. El-Awady |
On-Site Speaker (Planned) |
Ali Rida |
Abstract Scope |
Slip transmission across α-β interfaces is of great significance in understanding the strength of α-β Ti-alloys for aerospace applications. Molecular statics and dynamics simulations were conducted to investigate the mechanisms of slip transmission of < a > prismatic screw dislocations across the α-β interface side face. Firstly, the misfit dislocations structure on the α-β interface side face has been characterized from MS simulations. The predicted dislocation structure is in good agreement with experimental observations in Ti-alloys.Then, MD simulations of the interaction of [a1], [a2], and [a3] prismatic screw dislocations with the interface side face in an α-β bi-crystal were performed at different temperatures. A distinct barrier of the interface side face to different types of dislocation transmission was found. The origin of this anisotropy in the slip transmission is due to the relative misalignment of the slip systems between the α and the β phases from the Burgers orientation relationship. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Mechanical Properties, Other |