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arXiv · 2404.18223

On the suitability of single-edge notch tension (SENT) testing for assessing hydrogen-assisted cracking susceptibility

L. Cupertino-Malheiros·T. K. Mandal·F. Thebault·E. Martínez-Pañeda
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Abstract

Combined experiments and computational modelling are used to increase understanding of the suitability of the Single-Edge Notch Tension (SENT) test for assessing hydrogen embrittlement susceptibility. The SENT tests were designed to provide the mode I threshold stress intensity factor ($K_{\text{th}}$) for hydrogen-assisted cracking of a C110 steel in two corrosive environments. These were accompanied by hydrogen permeation experiments to relate the environments to the absorbed hydrogen concentrations. A coupled phase-field-based deformation-diffusion-fracture model is then employed to simulate the SENT tests, predicting $K_{\text{th}}$ in good agreement with the experimental results and providing insights into the hydrogen absorption-diffusion-cracking interactions. The suitability of SENT testing and its optimal characteristics (e.g., test duration) are discussed in terms of the various simultaneous active time-dependent phenomena, triaxiality dependencies, and regimes of hydrogen embrittlement susceptibility.

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L. Cupertino-Malheiros, T. K. Mandal, F. Thebault, E. Martínez-Pañeda. 2024-04-28. On the suitability of single-edge notch tension (SENT) testing for assessing hydrogen-assisted cracking susceptibility. https://arxiv.org/abs/2404.18223

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