Lee, S.-Y., Gao, Z., Choi, J.-H., Zhao, Y., Wang, P., Murakami, K., Komazaki, S., Kim, H. S., Ramamurty, U., & Jang, J. (2026). A novel specimen geometry for an improved estimation of hydrogen effects on the tensile behavior of face-centered cubic alloys. Scripta Materialia, 117361. https://doi.org/10.1016/j.scriptamat.2026.117361
Abstract:
The significantly lower hydrogen (H) diffusivity in face-centered cubic (fcc) alloys compared to body-centered cubic alloys causes electrochemically charged H to remain primarily only in the near-surface region of tensile specimens. Such localized distribution often leads to a misinterpretation of H effect on the uniaxial tensile behavior of conventional specimens. To address this issue, here we propose a novel tensile specimen geometry for a better estimation of the influence of H on the tensile behavior of fcc alloys. Our results reveal that this new approach effectively captures H effects, which was confirmed by analyzing the H distribution within the specimens using the silver decoration technique.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the A*STAR - Advanced Alloys and Coatings for Structural and Functional Applications in Extreme Environments
Grant Reference no. : M25P1a0081