The paper deals with fatigue crack propagation in a 2195-T8 alloy plate. It is shown that fatigue resistance of this alloy is comparable to that of the classical 2xxx or 7xxx competitor alloys. This study highlights stress ratio effects on the fatigue behaviour at the threshold: the stress intensity factor range ΔKth decreases as R increases. The crack growth path, very sensitive to the texture of the plate, occurs in a crystallographic way, giving rise to strong deflection and zig-zag advance. The crack path provokes a mixed mode I and II fatigue fracture, and makes active crack retardation by the crack closure mechanism.
Fatigue crack propagation in 2195-T8 aluminium alloy plate / Doglione, Roberto; M., Bartolone. - (2004), pp. 616-621. (Intervento presentato al convegno 9th International Conference on Aluminium Alloys).
Fatigue crack propagation in 2195-T8 aluminium alloy plate
DOGLIONE, Roberto;
2004
Abstract
The paper deals with fatigue crack propagation in a 2195-T8 alloy plate. It is shown that fatigue resistance of this alloy is comparable to that of the classical 2xxx or 7xxx competitor alloys. This study highlights stress ratio effects on the fatigue behaviour at the threshold: the stress intensity factor range ΔKth decreases as R increases. The crack growth path, very sensitive to the texture of the plate, occurs in a crystallographic way, giving rise to strong deflection and zig-zag advance. The crack path provokes a mixed mode I and II fatigue fracture, and makes active crack retardation by the crack closure mechanism.Pubblicazioni consigliate
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https://hdl.handle.net/11583/1410755
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