| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Microstructural Relationships to both Directional and Bulk Sensitization Responses in 5XXX Series Aluminum Alloys |
| Author(s) |
Matthew A. Steiner, Likun Sun |
| On-Site Speaker (Planned) |
Matthew A. Steiner |
| Abstract Scope |
Despite the kinetics of sensitization behaving similarly for every grain boundary on a local scale, the bulk sensitization response of nominally identical 5XXX series aluminum alloy plates varies significantly within a given alloy-temper designation. As the starting microstructure and total rolling reduction are not specified by the temper, each material lot can possess a unique final microstructure. The extent of intergranular corrosion in sensitized materials is highly dependent on the exact geometric configuration of networked high-angle grain boundaries available for propagation. This leads to a large directional dependency in the degree of sensitization (as measured by corrosion) along different axes of anisotropic microstructures such as rolled plates. Utilizing adaptations of the Nitric Acid Mass Loss Test (NAMLT), used to assess bulk sensitization, we will present isolated directional inter-granular corrosion responses from different microstructures that help to establish ties between local boundary sensitivity, microstructural configuration, and the bulk NAMLT measurements. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |