Hydrogen Embrittlement

Natural & Formal Sciences Dictionary
Reduction of ductility and toughness, often leading to delayed or sudden brittle fracture of a metal as a result of hydrogen ingress, transport to vulnerable sites, and interaction with microstructural traps or interfaces.

Hydrogen Embrittlement

Engineering & Applied Technologies Dictionary
Loss of ductility and increased susceptibility to sudden brittle fracture in susceptible metals caused by ingress or generation of diffusible hydrogen combined with tensile stress concentrations or service loading.