Cracking on joint lug of aluminum alloy framework of an airplane

A new interesting paper in  » Engineering Failure Analysis » published on

An aluminum alloy joint lug of the framework of an airplane was found to have a crack near the bolt hole after serving for a period. The failure mode is stress corrosion cracking.  The cracking of the inner surface anodic oxidation film is the main cause. Some prevention measures for such failure were proposed.

This paper brings out the detail of investigation carried out.

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