| 孔腐蚀损伤对LY12CZ铝合金疲劳寿命的影响研究 |
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| 引用本文： | 刘海燕,王红斌,张亚娟.孔腐蚀损伤对LY12CZ铝合金疲劳寿命的影响研究[J].装备环境工程,2010,7(2):5-8. |
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| 作者姓名： | 刘海燕 王红斌 张亚娟 |
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| 作者单位： | 中国飞机强度研究所,西安,710065 |
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| 基金项目： | 航空科学基金(05B23008) |
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| 摘 要： | 对Kt=3．0的LY12CZ铝合金疲劳试验件的中心孔进行加速腐蚀，经3次不同腐蚀时间后取样，用KH-7700型三维数字显微镜检测腐蚀坑，获得了包括长、宽、深、表面积和体积的三雏形貌。通过疲劳试验，获得不同腐蚀损伤下试件的S-N曲线；通过理论推导得到了孔边在不同腐蚀损伤下的有效应力集中系数。建立了腐蚀损伤量与孔边有效应力集中系数增量之间的关系，使得在已知腐蚀损伤的情况下可以更直接地获得疲劳寿命。
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| 关 键 词： | 铝合金 腐蚀坑 有效应力集中系数 S-N曲线 |
Research on Effect of Pitting Corrosion Damage on Fatigue Life of LY12CZ Aluminum Alloy |
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| LIU Hai-yan,WANG Hong-bin,ZHANG Ya-juan.Research on Effect of Pitting Corrosion Damage on Fatigue Life of LY12CZ Aluminum Alloy[J].Equipment Environmental Engineering,2010,7(2):5-8. |
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| Authors: | LIU Hai-yan WANG Hong-bin ZHANG Ya-juan |
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| Institution: | LIU Hai-yan,WANG Hong-bin,ZHANG Ya-juan |
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| Abstract: | Aluminum alloy(LY12CZ) samples with one centre hole with stress concentration factor Kt=3.0 were tested with accelerated corrosion.Sampling after three kinds of different corrosion periods,three-dimensional images and geometrical dimension of the corrosion pits including the length,width,depth,area,and volume were obtained by KH-7700 three-dimensional numerical microscope.The S-N curves of the samples of different corrosion periods were drawn according to the fatigue test data.By analyzing the holes of effi... |
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| Keywords: | aluminum alloy corrosion pit efficient stress concentration factor S-N curve |
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