|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Transformation-mediated Twin Nucleation and the Temperature Dependence in Hexagonal Close-packed Metals
||Lei Cao, Mehrab Lotfpour, Amir Hassan Zahiri, Jamie Ombogo
|On-Site Speaker (Planned)
Though twinning plays an equally vital role to that of dislocation slips in accommodating deformation in the hexagonal close-packed Ti and its alloys, its atomic-level nucleation mechanism has long been under debate. Accordingly, there is a critical need to rigorously understand the atomic mechanism of twin nucleation. We performed large-scale molecular dynamics simulations to study the deformation process in titanium. We found the nucleation of various deformation twins through reversible martensitic phase transformations, via evanescent intermediate phases. Furthermore, the findings are applied to rationalize the anomalous temperature dependence of the activation of different twinning modes in Ti and Zr.
||Modeling and Simulation, Titanium, Phase Transformations