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| Corrosion Morphology and Crack Growth Analysis of Aluminum Alloy Material |
| Received:March 01, 2011 Revised:August 15, 2011 |
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| DOI： |
| KeyWord:corrosion pits corrosion morphology fatigue life fatigue crack crack growth |
| Author | Institution |
| Corrosion Morphology and Crack Growth Analysis of Aluminum Alloy Material |
650 Research Institute of Hongdu Group， Nanchang ， China |
| ZHU Zuo-tao |
Qingdao Branch of Naval Aeronautical Engineering Academy， Qingdao ， China |
| MU Zhi-tao |
Qingdao Branch of Naval Aeronautical Engineering Academy， Qingdao ， China |
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| Abstract: |
| Aluminum alloy was tested with accelerated corrosion method. The corrosion pits were seen as ellipse balls and examined with QUESTAR three-dimensional optics microscope. The results showed that the depth and width of corrosion pits increasing with corrosion time and in according with power function, but the acceleration decrease; Corrosion can reduce the fatigue life of the materials significantly and is the main cause of fatigue crack formation and growth; AFGROW software can simulate crack growth life well and the error is low; the crack growth life and critical crack length obtained by AFGROW simulation are conservative than experiment values. |
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