XX ENCUENTRO DEL GRUPO ESPAÑOL DE FRACTURA
2-4 de abril de 2003, Benicàssim, Castellón
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| Título |
EFFECT OF TEMPERATURE ON FATIGUE CRACK BEHAVIOUR IN
DIFFERENT ALLOYS |
| Autor 1 |
F. S. Silva |
Mechanical Engineering Department, Minho University. Guimarães - Portugal |
| Autor 2 |
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| Autor 4 |
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| Resúmen |
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. |
| Palabras Clave |
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Lugar |
Benicassim |
| Tomo de Anales |
20 |
Link |
PDF |
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