About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Nanostructured Metallic Materials with Thick Grain Boundaries |
Author(s) |
Jie Ding, Ruizhe Su, Dajla Neffati, Yashashree Kulkarni, Xinghang Zhang |
On-Site Speaker (Planned) |
Xinghang Zhang |
Abstract Scope |
Nanocrystalline metallic materials have high mechanical strength with limited plasticity. Grain boundaries (GBs) act as effective barriers to the transmission of dislocations and consequently lead to strengthening. Conventional GBs have a thickness of 1-2 atomic layers, typically 0.5 nm. When GB thickness increases to several nm, the mechanical response of metallic materials can change significantly. Here we show examples of thick GBs in nanocrystalline Ni alloy and CoAl intemetallic alloy. In situ micropillar compression studies coupled with MD simulations suggest that the thick GBs play a major role in tailoring the strength and plasticity of metallic materials. The implications of these findings on the discovery of advanced materials and new deformation mechanisms will be discussed. |
Proceedings Inclusion? |
Planned: |