| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys, Processing and Characterization
|
| Presentation Title |
Simulations of Wear-induced Microstructural Evolution in Nanocrystalline Aluminum |
| Author(s) |
Yeqi Shi, Izabela Szlufarska |
| On-Site Speaker (Planned) |
Yeqi Shi |
| Abstract Scope |
Friction, wear resistance, and microstructural evolution of nanocrystalline (NC) aluminum during sliding were investigated using molecular dynamics simulations. The effect of dopants and twinning has also been explored and it was found that doped NC Al sample and twined NC Al sample exhibited better wear resistance and smaller friction force than pure NC Al sample. This trend was found to be correlated with higher hardness and higher strength of the doped NC Al sample and twined NC Al sample. We have determined the mechanisms of grain growth in NC Al and the main mechanism is grain boundary (GB) migration induced by emission of dislocations. Additional grain growth mechanisms found in the pure NC Al samples are disconnection-mediated GB migration and a so-called dissociation of low-angle GBs. Dislocation emission was suppressed in both doped and twined samples. |
| Proceedings Inclusion? |
Planned: Light Metals |