About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Atomic-scale Analysis of Hydrogen Embrittlement in High-strength Al Alloys |
Author(s) |
Dierk R. Raabe, Huan Zhao, Batiste Gault, Tilmann Hickel, Dirk Ponge, Binhan Sun |
On-Site Speaker (Planned) |
Dierk R. Raabe |
Abstract Scope |
we performed atomic-scale analysis of H trapped in second-phase particles and at grain boundaries in a high-strength 7xxx Al alloy. We used these observations to guide atomistic ab initio calculations, which show that the
co-segregation of alloying elements and H favours grain boundary decohesion, and the strong partitioning of H into the second-phase particles removes solute H from the matrix, hence preventing H embrittlement. Our insights further advance the mechanistic understanding of H-assisted embrittlement in Al alloys, emphasizing the role of H traps in minimizing cracking and guiding new alloy design. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Characterization, Environmental Effects |