| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
Slip Transmission in Ultra Fine Grain Materials |
| Author(s) |
Katerina E. Aifantis, Fei Shuang |
| On-Site Speaker (Planned) |
Katerina E. Aifantis |
| Abstract Scope |
Molecular dynamics simulations are employed to capture slip transmission in BCC Fe bicrystals with a grain size ranging from 10 to 100 nm. It is illustrated that the slip mechanisms, which occur either through dislocation absorption or emission at the grain boundary, depend on the grain size but also on the grain boundary structure and chemistry. Such grain boundary effects can be accounted for by defining a mechanically induced grain boundary energy, which is independent of the thermodynamic energy used to define grain boundaries. Incorporating such energy terms within gradient plasticity allows for expressions that can predict the grain boundary strength and hence be used to tailor material properties. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |