| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Phase Decomposition in Severe Plastic Deformed Complex Concentrated Alloys |
| Author(s) |
Sakshi Bajpai, Xin Wang, Calvin H. Belcher , Vivek Verma, Benjamin MacDonald, Julia Ivanisenko, Horst Hahn, Enrique Lavernia, Diran Apelian |
| On-Site Speaker (Planned) |
Enrique Lavernia |
| Abstract Scope |
The emergence of complex concentrated alloys (CCAs) has brought forth a new category of materials characterized by multiple principal elements. Initially, most CCAs were believed to exist as single-phase structures. Nevertheless, as research progressed, it became evident that certain CCAs, such as the renowned Cantor alloy, could undergo decomposition when exposed to intermediate temperatures for extended periods. Finer grain size further accelerated this tendency and impacted the mechanical behavior. This work focuses on the CoCrNi alloy, which is also considered a single-phase FCC alloy, but thermodynamic calculations predict the stability of a secondary phase at intermediate temperatures, which is yet to be confirmed experimentally. In this work, the phase stability of the ternary CoCrNi at intermediate temperatures is investigated in various grain size regimes achieved through varied deformation processing. Heat treatment experiments guided by CALPHAD were performed to study phase decomposition in the ternary system using transmission electron microscopy techniques. |
| Proceedings Inclusion? |
Planned: |