| 预腐蚀LY12CZ铝合金疲劳裂纹扩展行为研究 |
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| 引用本文： | 李旭东,王玉刚,苏维国,丁文勇.预腐蚀LY12CZ铝合金疲劳裂纹扩展行为研究[J].青岛科技大学学报,2013(2):182-187. |
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| 作者姓名： | 李旭东 王玉刚 苏维国 丁文勇 |
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| 作者单位： | 海军航空工程学院青岛校区 |
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| 摘 要： | 腐蚀疲劳是一种在机械应力和腐蚀介质联合作用下的材料退化行为。这种材料退化对于航空工业是一个严峻的问题。因此利用扫描电镜原位技术对于预腐蚀LY12CZ铝合金进行了实验研究。实验结果表明腐蚀损伤对于铝合金疲劳裂纹扩展行为具有强烈的影响,这种影响可以用腐蚀坑深度来表征。并提出了一种评价铝合金腐蚀疲劳裂纹行为的方法。
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| 关 键 词： | 疲劳裂纹 铝合金 预腐蚀 微结构 SEM原位技术 |
Research on Fatigue Cracking Behavior of LY12CZ Aluminum Alloy with Corrosion Damage |
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| LI Xu-dong,WANG Yu-gang,SU Wei-guo,DING Wen-yong.Research on Fatigue Cracking Behavior of LY12CZ Aluminum Alloy with Corrosion Damage[J].Journal of Qingdao University of Science and Technology:Natutral Science Edition,2013(2):182-187. |
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| Authors: | LI Xu-dong WANG Yu-gang SU Wei-guo DING Wen-yong |
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| Affiliation: | (Qingdao Campus of Naval Aeronautical Academy,Qingdao 266041,China) |
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| Abstract: | Corrosion fatigue is a form of degradation subjected to combined damage of mechanical stress and corrosive medium,which is a severe issue in aircraft industry.Experimental investigations on prior corrosion fatigue cracking behavior of LY12CZ were conducted with scanning electron microscope(SEM).Results indicate corrosion damage is important for the fatigue cracking behavior of LY12CZ aluminum alloy.The effect of corrosion pit on fatigue crack can be characterized by the depth of corrosion pit.A method to evaluate corrosion fatigue crack growth for AA LY12CZ is proposed. |
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| Keywords: | fatigue crack aluminum alloy pre-corrosion microstructure SEM in-situ technology |
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