Effects of micro-scale corrosion damage features and local microstructure on fatigue crack initiation location

Effects of micro-scale corrosion damage features and local microstructure on fatigue crack initiation location

•Corrosion and microstructure characterized a fatigue initiation sites in AA7050.•No independent correlation between individual features and initiation locations.•Strongly suggests a coupled interaction of features governs the initiation behavior. The fatigue resistance of aerospace structures is de...

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Veröffentlicht in:International journal of fatigue 2021-09, Vol.150, p.106301, Article 106301
Hauptverfasser: Co, Noelle Easter C., Burns, James T.
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum
Corrosion
Corrosion effects
Corrosion fatigue
Corrosion morphology
Corrosion resistance
Corrosion tests
Crack initiation
Crack propagation
Damage
Fatigue crack growth
Fatigue failure
Fatigue initiation
Fatigue strength
Fracture mechanics
Fracture surfaces
Grains
Materials fatigue
Microstructure
Misalignment
Morphology
Scale (corrosion)
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Beschreibung
Zusammenfassung:•Corrosion and microstructure characterized a fatigue initiation sites in AA7050.•No independent correlation between individual features and initiation locations.•Strongly suggests a coupled interaction of features governs the initiation behavior. The fatigue resistance of aerospace structures is degraded by the presence of corrosion damage. This work characterizes the micro-scale (
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2021.106301