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Four nose wheels fabricated from 2014-T6 aluminum alloy and cold worked at the flange were examined. Visual examination showed that the failure started in the tube well area on the wheel with serial number 31. The failure initiated in the flange fillet on wheels with serial numbers 67, 217, and 250. Scanning electron microscopy (SEM) examination of the fractures showed that failure initiated by SCC or a corrosion pit on all failures examined. The failures then progressed by fatigue. Dye penetrant testing revealed no additional flaws on the wheels that had failed in the flange area. There was, however,...

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