C13-b4 - Ultrasonic metrology for the study of hydrogen embrittlement in steels
- Event
- 2025 ICU PADERBORN - 9th International Congress on Ultrasonics
2025-09-21 - 2025-09-25
Paderborn - Band
- Lectures
- Chapter
- C13-b - Ultrasonic Material Characterization
- Author(s)
- L. Leffray, G. Feuillard, J. Toupin, H. Achdjian, J. Bustillo - INSA Centre Val de Loire, Blois (France), N. Mary - INSA Lyon, Lyon (France)
- Pages
- 239 - 242
- DOI
- 10.5162/Ultrasonic2025/C13-b4
- ISBN
- 978-3-910600-08-9
- Price
- free
Abstract
In this work, we propose the development of an ultrasonic metrology system that allows for real-time measurements of velocity in steels during electrochemical hydrogen charging. This study is coupled with a propagation model in a water-steel-water structure. For 2% variation of the stiffness coefficient when the material is fully charged in hydrogen, we simulate a variation of a few dozen meters per second due to property changes. We report the measurement of velocity variations conducted on a DP800 dual-phase steel. When the effect of the temperature on the velocity measurement is compensated, the standard deviation for the velocity measurement is less than 0.2 m/s. Experiments were conducted in DP800 dual-phase steel over several tens of hours of electrochemical charging of steel immersed in a hydrogenocarbonate solution on two samples. A hardening of the material is observed, with velocity an increase of 25 m/s in one sample and 45 m/s in the second one.