Environmental Durability of Aircraft Aluminum Alloy Skin Materials
Date Published: 1993-05-01
Paper Number:931229
DOI: 10.4271/931229
Citation:
Patni, K., Eftekhari, A., Gondhalekar, V., Chaudhuri, J. et al., "Environmental Durability of Aircraft Aluminum Alloy Skin Materials," SAE Technical Paper 931229, 1993, doi:10.4271/931229.
Author(s):
K. Patni - Cessna Aircraft Co.
A. Eftekhari - Cessna Aircraft Co.
V. Gondhalekar - Cessna Aircraft Co.
J. Chaudhuri - Wichita State Univ.
Y. M. Tan - Wichita State Univ.
Abstract:
This paper compares the environmental durability of currently used as well as some of the potential aircraft aluminum alloy skin materials. A simple test was developed to evaluate the environmental durability by simultaneous application of fatigue loads and aerated salt water attack. Alclad alloys showed excellent resistance to corrosion fatigue. On the other hand, 7475 alloy and new potential material 6013 alloy experienced inter-granular corrosion at the fatigue crack origin area. The test results also indicated the significance of corrosion preventive coatings to increase the age of aircraft.
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