About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Elucidation of Corrosion Mechanisms in Light Alloys by In situ X-ray Micro and Nanotomography |
Author(s) |
Nikhilesh Chawla |
On-Site Speaker (Planned) |
Nikhilesh Chawla |
Abstract Scope |
Light alloys are frequently exposed to harsh environments in service. X-ray synchrotron micro and nanotomography provide a wonderful means of characterization damage in materials non-destructively. In this talk, I will describe experiments and simulations that address the critical link between microstructure and corrosion behavior of aluminum and magnesium alloys, by using a three-dimensional (3D) virtual microstructure obtained by x-ray synchrotron tomography. In particular, precipitate location, size, and composition play a pivotal role in determining the initiation and propagation of corrosion damage light alloys. 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. 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: |
Keywords |
Magnesium, Environmental Effects, Aluminum |