Fatigue life extension by an artificially induced retardation mechanism
Journal
Engineering Fracture Mechanics
Journal Volume
43
Journal Issue
4
Pages
677-684
Date Issued
1992
Author(s)
Abstract
Previous work showed that premature crack closure is a major cause of overload retardation in fatigue crack growth in AISI 304 stainless steel. Following this line of reasoning, a vacuum infiltration process was attempted in order to put extra materials into the crack flanks to induce retardation artificially. It was found that by infiltrating epoxy resin, the amount of retardation induced was comparable to that caused by an overload but the affected crack growth increment was smaller. Infiltration with water-based suspension of alumina powder was unsuccessful. Details of the change in crack growth behavior due to overload and infiltration with epoxy resin are reported and the possibility of practical application of this technique for fatigue life extension is discussed. © 1992.
SDGs
Type
journal article