RT info:eu-repo/semantics/article
T1 Design and validation of an in-situ hydrogen embrittlement system in a rotary bending fatigue testing machine
A1 Calaf Chica, José
A1 Muñoz Manero, José E.
A1 García Tárrago, María José
A1 Preciado Calzada, Mónica
A1 Bravo Díez, Pedro Miguel
K1 Rotary bending fatigue machine
K1 Hydrogen
K1 SPT
K1 Embrittlement
K1 Hidrógeno
K1 Hydroge
K1 Materiales-ensayos
K1 Materials-Testing
AB Hydrogen is a promising clean energy source, but its integration brings challenges, notably hydrogen embrittlement (HE), which degrades materials used in hydrogen infrastructure. Metals, especially steel, are vulnerable, leading to reduced strength and safety risks. Testing methodologies, including in-situ and ex-situ methods, are crucial to understanding HE. Insitu methods simulate real-time exposure, whereas ex-situ methods focus on post-exposure effects. Rotary bending fatigue tests are particularly interesting as they are cost-effective fatigue machines. This study aims to design and implement an electrochemical cell for in-situ HE testing under cyclic loading in this particular fatigue machine. The study focuses on adapting an electrochemical cell for a rotary bending fatigue machine, testing 42CrMo4 steel. Three key tasks were performed: (i) determining electrochemical parameters for inducing HE through Small Punch Tests (SPTs), (ii) evaluating an electrolyte jet system’s effectiveness, and (iii) designing and validating the electrochemical cell. Electrolytes tested included acid and alkaline solutions, and a novel jetting system was devised to ensure electrolyte coverage during high-speed rotation. The system’s electrical configuration and the cell’s structural adaptations for in-situ hydrogen charging were critical design elements. The tests confirmed the system’s effectiveness in charging the specimen with hydrogen, as evidenced by fatigue life reduction and fracture surface analysis. Specimens precharged with hydrogen, specifically in acidic environments, displayed increased brittleness and premature failure, contrasting with the ductile behavior of non-embrittled specimens. This highlights the system’s potential for future studies on material resistance to hydrogen embrittlement under cyclic loads.
PB Elsevier
SN 1350-6307
YR 2025
FD 2025-07
LK https://hdl.handle.net/10259/11298
UL https://hdl.handle.net/10259/11298
LA eng
DS Repositorio Institucional de la Universidad de Burgos
RD 05-may-2026