About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
|
| Presentation Title |
In-situ HRTEM for Atomic-Scale Plasticity Events (twinning and shear band processes in nanoscale refractory crystals) |
| Author(s) |
Scott. X. Mao, Changxin Han |
| On-Site Speaker (Planned) |
Scott. X. Mao |
| Abstract Scope |
Competition between different deformation mechanisms in nanoscale materials determines their plastic behaviours. Understanding the transition among different mechanisms is critical for controlling the mechanical properties of these materials. Here, by in-situ high resolution transmission electron microscopy observation as experimental molecular dynamics approach, the orientation-dependent plasticity was observed in body-centered cubic tungsten nanowires. Twinning-dominated plastic behaviour and discrete shear-band plasticity in tungsten nanowires were found, which was contributed to the competition between twinning and dislocation-slip under different loading orientation. Twinning and shear band nucleation and growth process at atomic scale have been captured under in-situ HRTEM, which are different from FCC twinning process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Phase Transformations |