Sociedad Española de Integridad Estructural
Grupo Español de Fractura

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Sociedad Española de Integridad Estructural
Grupo Español de Fractura
Todas estas publicaciones se ofrecen de forma gratuita y son de libre difusión. También puedes descargar las actas completas».
F. S. Silva
Anales de la Mecánica de la Fractura, nº 20
. 2003
. Pág. 231
-236
Ver (.pdf): GEF029
Resumen: This paper deals with the role of temperature in the behaviour of fatigue cracks in different alloys used in the aircraft industry. Three different alloys were studied: an aluminium alloy (Al 7175), a titanium alloy (Ti6Al4V), and an high strength steel (34CrNiMo6). Push-Pull tests (R = -1) were carried out at different temperatures, from low temperatures, (-100ºC), to somehow high temperatures (+ 400ºC), in air. At each temperature the shape of the da/dN-Kmax curve was assessed, as well as the initiation life, (a Nf curve). The relation initiation life/propagation life was also assessed, (a N/Nf curve). The effect of temperature in the referred subjects was discussed. The existence of a ductile-brittle fatigue transition temperature, parallel to the monotonic ductile-brittle transition temperature, although these transition temperatures are not the same, was assessed. Even on materials without a monotonic ductile-brittle transition temperature, a ductile-brittle fatigue transition temperature was detected.
Localización: Benicassim
Mechanical Engineering Department, Minho University. Guimarães - Portugal