| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Some Like it Soft: Understanding the Role of Dislocation Density on Hydrogen Embrittlement of Pure Aluminum |
| Author(s) |
Adam B. Freund, Josh Edwards, Ruben Ochoa, Suveen Mathaudhu |
| On-Site Speaker (Planned) |
Adam B. Freund |
| Abstract Scope |
High-strength aluminum alloys are frequently selected for hydrogen applications due to their passivating layer and resistance to hydrogen penetration. However, this assumption is not entirely accurate. Deformation of aluminum disturbs the passivating alumina layer, and with the presence of water, aluminum reacts to form hydrogen, which infiltrates the material. However, the effects of high dislocation density on hydrogen trapping in aluminum are not fully investigated. Exploration of the role of dislocation density was accomplished in part through slow strain rate testing utilizing in-situ hydrogen charging via humid air exposure. Results indicate minimal, if any, effect of dislocation density on slow strain rate tension results and plasticity. Proposed mechanisms for this observation will be reported. This study demonstrates that dislocation density and hydrogen concentration may not impact the mechanical properties of pure aluminum as previously thought. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Mechanical Properties, |