| 发动机三级涡轮叶片断裂分析 |
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| 引用本文： | 刘道新,闫文博.发动机三级涡轮叶片断裂分析[J].理化检验(物理分册),1998,34(12):33-35,16. |
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| 作者姓名： | 刘道新 闫文博 |
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| 作者单位： | 西北工业大学民航工程学院 西安710072
(刘道新，闫文博，谢发勤)，西北工业大学民航工程学院 西安710072(万小朋) |
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| 摘 要： | 某发动机三级涡轮转子叶片在飞机赶快冰爬升时断裂，通过断口ＳＥＭ观察，ＥＤＡＸ成分分析，叶片基材金相检验和硬度测试等分析了叶片的断裂原因和机制，结果表明，共振是叶片失稳断裂的直接原因，热疲劳萌生裂纹，高温腐蚀疲劳控制裂纹稳态扩展，材料冶金缺陷对叶片断裂过程有促进作用。
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| 关 键 词： | 涡轮 叶片 共振 热疲劳 腐蚀疲劳 航空发动机 |
FRACTURE ANALYSIS OF THE THIRD STAGE TURBINE BLADES IN AN AERO-ENGINE |
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| Liu Daoxin Yan Wenbo Xie Faqin Wan Xiaopeng.FRACTURE ANALYSIS OF THE THIRD STAGE TURBINE BLADES IN AN AERO-ENGINE[J].Physical Testing and Chemical Analysis Part A:Physical Testing,1998,34(12):33-35,16. |
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| Authors: | Liu Daoxin Yan Wenbo Xie Faqin Wan Xiaopeng |
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| Affiliation: | Civil Aviation Engineering College of Northwestern Polytechnical University |
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| Abstract: | The fracture characteristics and its mechanism of one third stage turbine blade in an aero-engine have been studied using SEM, EDAX, hardness measurement and metallographic techniques. The results showed that the failure of the blade was caused directly by resonance of the blade. Thermal fatigue led to crack initiation. Corrosion fatigue at elevated temperature controlled crack propagation. The metallurgical defects of the blade promoted crack growth. |
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| Keywords: | Turbine blade Resonance Thermal fatigue Corrosion fatigue |
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