About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-44: In Situ Investigation of Internal Crack Initiation in Hydrogen Embrittled Alloy 725 |
| Author(s) |
Aiden Norris Gray, Elizabeth Clark, Dula Parkinson, Chris San Marchi, Mengying Liu |
| On-Site Speaker (Planned) |
Aiden Norris Gray |
| Abstract Scope |
Despite its superior properties, Ni-based alloy 725, like other metallic materials, is susceptible to hydrogen embrittlement (HE), losing ductility and failing catastrophically when exposed to H-rich environments, sometimes without any surface warning signs. While extensive research has investigated hydrogen-assisted cracking in-situ with electron microscopy, surface crack initiation may not accurately represent the internal damage mechanisms. In this work, we utilize in-situ micro-computed tomography (CT) to directly observe the evolution of HE cracks during tensile loading. Trainable Weka segmentation is used to segment and quantify the size, shape and position of HE cracks. Our findings advance the understanding of hydrogen-induced damage mechanisms and enable more accurate lifetime predictions for components operating in H-rich environments. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Copper / Nickel / Cobalt, Other, Machine Learning |