Hydrogen embrittlement interactions in cold-worked steel
- Univ. of Calgary, Alberta (Canada). Dept. of Mechanical Engineering
Effects of cold work on hydrogen (H) transport, H concentration, and H embrittlement (HE) in type 1020 steel (UNS G10200) exposed in a sour environment were examined. Cold work decreased H diffusivity and increased H concentration in the steel. The increase in dislocations as a result of cold work was responsible for the decrease in H diffusivity. The increase in H adsorption coverage on the surface and H trapping from cold work were likely causes for increases in H absorption into the steel. The fracture mode was dependent on specific sensitive locations within the steel that were affected by the cold work. After a steady H damage state occurred in the steel, the fracture toughness decreased with increasing cold work. Sufficiently low values of fracture toughness as a result of embrittlement occurred such that plane strain fracture occurred in relatively thin laboratory specimens. Sulfide stress cracking (SSC) of steels is of particular concern to oil and gas industries. Pipeline steels can fail when in contact with brine solutions containing hydrogen sulfide (H{sub 2}S).
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 187048
- Journal Information:
- Corrosion, Journal Name: Corrosion Journal Issue: 1 Vol. 51; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
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