About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Investigating the Influence of Strain Rate on Hydrogen Embrittlement in Steel Sub-Size Tensile Specimens Using X-Ray 3D Tomography |
Author(s) |
Luciano Meirelles Santana, Victor Okumko, Andrew King, Thilo Morgeneyer, Jacques Besson, Yazid Madi |
On-Site Speaker (Planned) |
Luciano Meirelles Santana |
Abstract Scope |
This study examines the effect of strain rate on hydrogen embrittlement in steel sub-size tensile specimens using X-ray 3D tomography. Tensile specimens were subjected to various strain rates in both air and a 100 bar hydrogen environment, with tests interrupted before fracture. High-resolution tomography revealed strain-rate-dependent differences in damage distribution and orientation. At moderate strain rates, damage initiates from the surface as flat ellipses perpendicular to the specimen's longitudinal axis, indicative of brittle hydrogen-induced cracking, and in the bulk as elongated ellipsoids aligned with longitudinal axis, typical of microvoid coalescence. At low strain rates, hydrogen diffuses more deeply, causing embrittlement throughout the specimen, with brittle damage parallel to the longitudinal axis observed both in bulk and at the surface. This research advances understanding of the mechanical response and damage progression in steel exposed to gaseous hydrogen. |
Proceedings Inclusion? |
Undecided |