2006 Volume 62 Issue 3 Pages 478-488
In this study, influence of corrosion on fatigue strengths of parent material and its joint by the friction stir welding (FSW) of extruded A6N01-T5 is clarified. The specimens of them are exposed at Okinawa, and investigations of corrosion are carried out on them after the atmospheric exposure in a half, one and two years. The relation between corrosion and fall of fatigue strength is clarified after fatigue tests of the corroded specimens. The form of the corrosion is intergranular corrosion. The erosion in the direction of the depth of each intergranular corrosion does not proceed after a year. Fatigue cracks are generated from the intergranular corrosion. The fatigue strength after the atmospheric exposure falls to 72% on the parent material and to 85% on the FSW joints.
Proceedings of the JSCE Earthquake Engineering Symposium
Environmental systems research
