Abstract
Hydrogen embrittlement of low-alloy steels has been investigated in relation to its dependence on hydrogen trapping and release, on the electrolytic hydrogen charging parameters, and on irradiation. The interaction of hydrogen with the structure of irradiated and unirradiated steels at higher charging current densities causes structural defects which can lead to a loss of ductility of the steel even after hydrogen release. The presence and the character of grain boundaries, secondary phases and other defects in the steel structure are of great importance from the viewpoint of the hydrogen embrittlement effect.
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