ON THE INFLUENCE OF INTERNAL HYDROGEN ON FATIGUE THRESHOLDS OF HSLA STEEL.

Khlefa A. Esaklul, William W Gerberich

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

In view of the current results and the previous work, the effect of hydrogen on fatigue crack growth near-threshold appears to depend on several factors. One of the most important is the availability of hydrogen ahead of the growing crack. The apparent absence of enhanced cracking effects in gaseous hydrogen near-threshold may reflect the hydrogen availability as controlled by rate of hydrogen adsorption and the diffusion distance in front of the crack tip. Once hydrogen becomes available at the crack tip through cathodic charging prior to testing or by the increase in the triaxial state of stress at the crack tip, as in the case of the high growth regime, increased susceptibility to cracking appears.

Original languageEnglish (US)
Title of host publicationPerspect in Hydrogen in Met
PublisherPergamon Press
Pages701-704
Number of pages4
ISBN (Print)0080348130, 9780080348131
StatePublished - Jan 1 1986

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