| 腐蚀坑对疲劳裂纹扩展的影响分析 |
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| 引用本文： | 陈定海,穆志韬,朱做涛,丁文勇.腐蚀坑对疲劳裂纹扩展的影响分析[J].装备环境工程,2012,9(4):4-7. |
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| 作者姓名： | 陈定海 穆志韬 朱做涛 丁文勇 |
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| 作者单位： | 1. 海军航空工程学院青岛校区,山东青岛266041
2. 中国人民解放军海军91049部队,山东青岛266102 |
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| 摘 要： | 利用显微镜测量了经过预腐蚀的6051铝合金材料的腐蚀坑三维形貌,分析了腐蚀坑截面形状,腐蚀坑近似为半椭球形。基于AFGROW软件分析疲劳裂纹扩展寿命,腐蚀坑深度与宽度对疲劳裂纹扩展寿命影响较大,随着腐蚀坑深宽比增加,疲劳裂纹扩展寿命趋于稳定,腐蚀坑的深度相对于宽度对裂纹扩展寿命影响更大。
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| 关 键 词： | 铝合金 腐蚀坑 腐蚀形貌 裂纹扩展寿命 |
| 收稿时间： | 2012/3/13 0:00:00 |
| 修稿时间： | 2012/8/15 0:00:00 |
Analysis of Corrosion Pitting Effect on Fatigue Crack Growth |
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| CHEN Ding-hai,MU Zhi-tao,ZHU Zuo-tao and DING Wen-yong.Analysis of Corrosion Pitting Effect on Fatigue Crack Growth[J].Equipment Environmental Engineering,2012,9(4):4-7. |
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| Authors: | CHEN Ding-hai MU Zhi-tao ZHU Zuo-tao and DING Wen-yong |
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| Institution: | 1. Qingdao Branch of Naval Aeronautical Engineering Academy, Qingdao 266041, China; 2. Unit 91049 of PLA, Qingdao 266102, China) |
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| Abstract: | Three-dimensional size of corrosion pitting of 6051 aluminum was measured by KH-7700 microscope. The cross-section morphology of corrosion pitting was analyzed, and the corrosion pitting can be approximated to a semi-ellipsoid. Fatigue crack growth life was analyzed with AFGROW. The results showed that pitting depth and width both have significant effect on fatigue crack growth life; with the increase of ratio of pitting depth and width, the fatigue crack growth life tended to be stable; and the pitting depth has greater effect on fatigue crack growth life than the width. |
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| Keywords: | aluminum alloy corrosion pitting corrosion morphology crack growth life |
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