| 叶彬,朱做涛,穆志韬.铝合金材料腐蚀形貌及裂纹扩展分析[J].装备环境工程,2011,8(4):54-58. Corrosion Morphology and Crack Growth Analysis of Aluminum Alloy Material,ZHU Zuo-tao,MU Zhi-tao.Corrosion Morphology and Crack Growth Analysis of Aluminum Alloy Material[J].Equipment Environmental Engineering,2011,8(4):54-58. |
| 铝合金材料腐蚀形貌及裂纹扩展分析 |
| Corrosion Morphology and Crack Growth Analysis of Aluminum Alloy Material |
| 投稿时间：2011-03-01 修订日期：2011-08-15 |
| DOI： |
| 中文关键词: 腐蚀坑 腐蚀形貌 疲劳寿命 疲劳裂纹 裂纹扩展 |
| 英文关键词:corrosion pits corrosion morphology fatigue life fatigue crack crack growth |
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| 中文摘要: |
| 通过加速腐蚀试验， 利用QUESTAR三维光学显微镜观察， 将蚀坑看作是椭球形， 其深度及宽度都符合幂函数的形式， 都随腐蚀时间的增加而增加， 但增加的速率都降低； 腐蚀能显著降低试件的疲劳寿命， 是疲劳裂纹形成的主要原因； AFGROW软件较好地拟合了腐蚀试件的裂纹扩展寿命， 拟合误差较低， 且所得的裂纹扩展寿命及临界裂纹长度比实际试验值都偏保守。 |
| 英文摘要: |
| 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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