Stress corrosion cracking and hydrogen embrittlement

[@hopefullysoonaweldingengineer]

Dr. Clayton and Prof. Harry thank you for that informtive video. At the begining of the video you said hydrogen embrittlement is much more important and considerable in low strain rates rather than higher for example charpy impact. But welding electrode's ductility or proof of that they do not have much hydrogen is defined by charpy impact test (for example low hydrogen basic electrodes). Isn't there a contrast?

[@bhadeshia123]

Hydrogen needs to diffuse to stress concentration in order to do damage. Hence it is not effective at large strain rates. I have worked in and with the welding industry for a long time - they do not use Charpy as an indicator of hydrogen, rather, they measure the hydrogen introduced by welding. www.phase-trans.msm.cam.ac.uk/2014/hydrogen.html

[@hopefullysoonaweldingengineer]

Professor, thank you for consideration and giving that further reading.👏@@bhadeshia123