Anomalous Fatigue Crack Growth Retardation in Steels for Offshore Applications

R Van Der Velden; HL Ewalds; WA Schultze; A Punter

doi:10.1520/STP44806S

SYMPOSIA PAPER Published: 01 January 1983

STP44806S

Anomalous Fatigue Crack Growth Retardation in Steels for Offshore Applications

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Cracks in structural steel were retarded or even stopped when fatigued in aerated seawater environments at 10 Hz. Backface strain measurements proved that the cause was corrosion product wedging, which enhances the effect of crack closure. The wedge thickness depended on the oxygen supply inside the crack. This is enhanced by acration and solution pumping, which was more effective at higher frequencies.

Author Information

Van Der Velden, R

Delft University of Technology, Delft, The Netherlands

Ewalds, HL

Delft University of Technology, Delft, The Netherlands

Schultze, WA

Delft University of Technology, Delft, The Netherlands

Punter, A

Matcon B. V., Emmen, The Netherlands

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Developed by Committee: E08

Pages: 64–80

DOI: 10.1520/STP44806S

ISBN-EB: 978-0-8031-4867-3

ISBN-13: 978-0-8031-0245-3

Anomalous Fatigue Crack Growth Retardation in Steels for Offshore Applications

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