| ZM6尾减机匣开裂失效分析 |
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| 引用本文： | 李莹,李春光,何玉怀,姜涛.ZM6尾减机匣开裂失效分析[J].材料工程,2009(10). |
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| 作者姓名： | 李莹 李春光 何玉怀 姜涛 |
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| 作者单位： | 北京航空材料研究院,中国航空工业失效分析中心,北京,100095 |
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| 摘 要： | 某型号飞机尾减机匣试验过程中出现异常,荧光检查发现裂纹.通过故障机匣外观检查、裂纹断口宏微观观察及能谱分析、材料硬度检测、金相检查等试验得出结论,尾减机匣失效属低周疲劳开裂,机匣表面Nd元素偏析是导致机匣疲劳裂纹形成的直接原因,材料韧性不足一定程度上促进了裂纹的疲劳扩展,根据分析结果,给出提高尾减机匣受力部位的疲劳抗力,避免故障再次发生的有效方法.
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| 关 键 词： | 尾减机匣 失效分析 疲劳裂纹 Nd偏析 |
Failure Analysis of ZM6 Engine Box |
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| LI Ying,LI Chun-guang,HE Yu-huai,JIANG Tao.Failure Analysis of ZM6 Engine Box[J].Journal of Materials Engineering,2009(10). |
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| Authors: | LI Ying LI Chun-guang HE Yu-huai JIANG Tao |
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| Affiliation: | LI Ying,LI Chun-guang,HE Yu-huai,JIANG Tao(Failure Analysis Center of Aviation Industries of China,Beijing Institute of Aeronautical Materials,Beijing 100095,China) |
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| Abstract: | A crack was founded in an engine box of an aeroplane during fatigue test by fluorescence penetrate testing.According to the results of macroscopical testing,fractography analysis,chemical analysis,hardness testing and metallographic analysis,it is concluded that the fracture model is low cycle fatigue,Nd segregation of the surface results in the fatigue fracture of the engine box and low material toughness promots the extending of the crack.Based on the analysis results,some measures are brought forward to ... |
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| Keywords: | engine box failure analysis fatigue crack Nd segregation |
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