About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Real Time Imaging
|
Presentation Title |
Nanoscale 4D Microstructural Characterization of Corrosion in Aluminum Alloys using In-situ Transmission X-ray Microscopy (TXM) |
Author(s) |
Sridhar Niverty, Arun Singaravelu, Xianghui Xiao, Wah-Keat Lee, Nikhilesh Chawla |
On-Site Speaker (Planned) |
Sridhar Niverty |
Abstract Scope |
Precipitate location, size, and composition play a pivotal role in determining the initiation and propagation of corrosion damage in aluminum alloys. Visualizing the effect of precipitates on a local as well as a global length scale can be challenging due to the small length scales involved. 3D X-ray nanotomography using Transmission X-ray microscopy (TXM) has been employed to non-destructively study localized corrosion in aluminum alloys in 3.5 wt.% NaCl solution. Four-dimensional (4D) in situ experiments conducted on different aging conditions yielded extremely interesting insights into the complex interplay between precipitates, grain boundaries, and inclusions. Coupling this with EBSD and TEM has enabled us to study the role of grain boundary mismatch and track compositional changes of the precipitates before and after the experiment. The correlative microscopy approach used here has yielded a multi-faceted understanding of the corrosion initiation and progression in these alloys at the nanoscale, which will be discussed. |
Proceedings Inclusion? |
Planned: |