Abstract
Cathodic hydrogen charging was applied to low-carbon pipeline-steel samples produced using different thermomechanical paths. The samples developed similar microstructures but different crystallographic textures and grain–boundary distributions. This made it possible to investigate the resistance to hydrogen-induced cracking (HIC) of steels with strong {1 1 1}ND and {1 1 2}ND texture fibres, steels with a dominating {0 0 1}ND texture fibre, and steels with close-to-random textures; { h k l}ND representing grain orientations with { h k l} planes parallel to the steel rolling plane. The results show that strong {1 1 1}ND fibre textures produced by warm-rolling schedules significantly increase HIC-resistance of pipeline steels, whereas {0 0 1}ND and close-to-random textures make steels HIC-prone.
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