Hydrogen-assisted fatigue crack growth in ferritic steels – a fractographic study

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ID: 84279
2018
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Abstract
Fatigue crack growth (FCG) behavior of a Fe-3wt.%Si ferritic alloy under different environmental conditions using in-situ electrochemical (cathodic) hydrogen (H) charging has been investigated. Three frequencies have been applied. Results clearly show that the FCG rate increased by a factor spanning from 20 to 1000 times, depending on the loading frequencies, when compared to the reference test in air. Lower frequency leads to higher FCG rate. A comprehensive fractographic analysis was carried out: the area fraction of different fracture surface features was measured and taken into statistical analysis. Based on these investigations, the possible mechanisms of H-enhanced FCG are discussed. Similar tests in high-pressure H gas from other studies were also compared and discussed. These results give a preliminary understanding of H effect in fatigue crack propagation procedure in ferritic alloys.
Reference Key
di2018hydrogenassistedmatec Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Di, Wan;Antonio, Alvaro;Vigdis, Olden;Afrooz, Barnoush;
Journal matec web of conferences
Year 2018
DOI
DOI not found
URL
https://doi.org/10.1051/matecconf/201816503004
Keywords
Engineering (General). Civil engineering (General) Mechanical engineering and machinery motor vehicles. aeronautics. astronautics engineering geology. rock mechanics. soil mechanics. underground construction structural engineering (general)

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