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| Failure Analysis of Fracture on Aluminum Alloy Frame |
| Received:July 08, 2010 Revised:April 15, 2011 |
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| DOI： |
| KeyWord:aluminum alloy frame crack stress-corrosion |
| Author | Institution |
| BAI Ming-yuan |
Beijing Institute of Aeronautical Materials， Beijing ， China |
| MA Hai-quan |
Beijing Institute of Aeronautical Materials， Beijing ， China |
| QU Shi-yu |
Beijing Institute of Aeronautical Materials， Beijing ， China |
| YANG Sheng |
Nanchang Hangkong University， Nanchang ， China |
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| Abstract: |
| Cracks were found on aluminum alloy frame not long after application. The cracks were studied using macro and micro observation, EDS, and microstructure analysis methods. The results showed that there are a lot of oxide and chloride resulting from corrosion on the fracture surface; the fracture mode of the aluminum frame is stress-corrosion. The stress-corrosion cracks were caused by thin coat of paint or lacking of protection of local area on inner surface, and stress corrosion cracking was created by working stress and external environment. Improvement of inner surface prevention technology of aluminum alloy frame was suggested. |
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