| 预腐蚀铝合金材料裂纹萌生寿命评估 |
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| 引用本文： | 李旭东,穆志韬,刘治国,朱武峰.预腐蚀铝合金材料裂纹萌生寿命评估[J].装备环境工程,2012,9(5):24-28. |
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| 作者姓名： | 李旭东 穆志韬 刘治国 朱武峰 |
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| 作者单位： | 海军航空工程学院青岛校区,山东青岛266041 |
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| 摘 要： | 铝合金在航空工业中广泛应用,因此对于铝合金构件的寿命评估很重要。利用扫描电子显微镜(SEM)原位观测技术,研究了预腐蚀铝合金试件在循环应力作用下的疲劳裂纹萌生和扩展行为。结果表明腐蚀坑对于裂纹萌生扩展行为具有强烈的影响。基于局部应变法,提出了一种预测带有腐蚀损伤的铝合金疲劳裂纹萌生寿命的评估公式。
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| 关 键 词： | 铝合金 原位技术 预腐蚀 疲劳短裂纹 |
| 收稿时间： | 3/5/2012 12:00:00 AM |
| 修稿时间： | 2012/10/15 0:00:00 |
Evaluation of Fatigue Initial Life for Aluminum Alloy with Pre-corrosion |
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| LI Xu-dong,MU Zhi-tao,LIU Zhi-guo and ZHU Wu-feng.Evaluation of Fatigue Initial Life for Aluminum Alloy with Pre-corrosion[J].Equipment Environmental Engineering,2012,9(5):24-28. |
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| Authors: | LI Xu-dong MU Zhi-tao LIU Zhi-guo and ZHU Wu-feng |
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| Institution: | (Qingdao Branch of Naval Aeronautical Academy,Qingdao 266041,China) |
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| Abstract: | Aluminum alloy is widely used in aviation industry,which makes it a key issue to evaluate the life aluminum components.Fatigue crack initiation and early stage propagation behavior of pre-corroded aluminum alloy under stress cycle was studied using scanning electron microscopy（SEM） in-situ observation.Results indicated that corrosion pit has significant influence on fatigue crack initiation and early stage propagation.A formula to evaluate the small fatigue crack initiation life of aluminum alloy with different corrosion damage was proposed based on local strain method. |
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| Keywords: | aluminum alloy SEM in-situ technology pre-corrosion fatigue small crack |
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