Corresponding author:
alexandra.lacombe1@univ-tlse3.fr,
+335 61 17 10 74
Abstract: The influence of the hole surface integrity on the
fatigue life of 2024-T351 aluminium drilled parts was investigated.
Fatigue tests were conducted on open-hole specimens and a large campaign
was carried out to characterize the hole surface integrity (roughness
measurements, hardness measurements, metallographic observations and
residual stress analysis). An innovative technique, the Hole Opening
Comparative Technique, was set up in order to analyse the residual
stress state of the parts. In this study, strain hardening of the hole
subsurface seems to be the main factor influencing the fatigue
behaviour, associated with a residual stress state of the part.
Keywords: Fatigue strength, aluminium alloy, surface roughness,
hardness, residual stress