| 汽轮机叶片断裂失效分析 |
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| 引用本文： | 张升才.汽轮机叶片断裂失效分析[J].金属热处理,2006,31(10):79-81. |
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| 作者姓名： | 张升才 |
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| 作者单位： | 浙江大学材料系,浙江杭州,310027 |
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| 摘 要： | 对汽轮机断裂叶片进行了金相组织观察、断口扫描及能谱分析。结果表明该汽轮机叶片的断裂是由于叶片边缘与加热器接触，导致局部组织严重过热，从而使该处强度降低，萌生裂纹源，在交变应力作用下裂纹进一步扩展最终导致疲劳断裂。
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| 关 键 词： | 汽轮机叶片 裂纹源 疲劳断裂 |
| 文章编号： | 0254-6051（2006）10-0079-03 |
| 收稿时间： | 2006-06-13 |
| 修稿时间： | 2006-06-13 |
Analysis of Fatigue Cracking for Turbine Blade |
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| ZHANG Sheng-cai.Analysis of Fatigue Cracking for Turbine Blade[J].Heat Treatment of Metals,2006,31(10):79-81. |
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| Authors: | ZHANG Sheng-cai |
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| Affiliation: | Department of Materials Science and Engineering, Zhejiang University, Hangzhou Zhejiang 310027, China |
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| Abstract: | Metallographic observation, fracture scanning and energy dispersion spectrum analysis on the fractured turbine blade were carried out. The results show that the failure of the turbine blade is caused by contact of the blade edge with the heating element, which leads to overheat on partial areas so as to decrease the strength of the areas, and then the source of microcracks is formed. By the action of alternating stress, the microcracks would eventually lead to fatigue cracking. |
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| Keywords: | turbine blade microcrack source fatigue cracking |
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