| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Imaging Nanostructural Heterogeneities Induced by Molten Salt Corrosion in Ni-Cr Alloy |
| Author(s) |
Yang Yang, Weiyue Zhou, Sheng Yin, Sarah Wang, Qin Yu, Robert O. Ritchie, Mark Asta, Ju Li, Michael P. Short, Andrew M. Minor |
| On-Site Speaker (Planned) |
Yang Yang |
| Abstract Scope |
Nanostructural heterogeneities, such as chemical precipitation and porosity, can be introduced during corrosion, compromising materials performance. A prominent challenge to decipher how heterogeneity develops is the pre- and post-mortem characterization of the defect evolution, which involves the localization of excess free volumes and elastic strains. Here, using a combination of advanced electron microscopy techniques including focused-ion-beam lift out, three-dimensional (3D) electron tomography and four-dimensional scanning transmission electron microscopy (4D-STEM), we report on the characterization of the nanostructural heterogeneity in a Ni-Cr alloy induced by molten-salt corrosion. In this presentation, we attempt to address several fundamental questions regarding the detailed mechanisms of defect transport near the grain boundaries and how they are affected by nonequilibrium point-defect concentrations, strain, microstructure and chemical reactions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Environmental Effects, Nuclear Materials |