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首页> 外文期刊>Fatigue & Fracture of Engineering Materials & Structures >Failure assessment of the first stage high-pressure turbine blades in an aero-engine turbine
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Failure assessment of the first stage high-pressure turbine blades in an aero-engine turbine

机译：航空发动机涡轮中的第一级高压涡轮叶片的失效评估

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摘要

In this paper, microscopic analysis and fatigue experiment were conducted to detect the damage degree of turbine blades after a 600 h service and determine the reliable service time. First, several service blades were cut into slices on different cross sections and microscopically examined. It is found that the γ′ phase particles are slightly coarsened and the γ′ phase parameters change with temperature and stress distribution. Then, fatigue test was conducted on service blades simulating the real working condition. The test result shows that the blades after a 600 h service would serve for 3596 h more until failure during actual flight. The ultimate fracture is mainly caused by the interaction of fatigue, creep and oxidation. Besides, the γ′ phase parameters change obviously compared with service blade without fatigue test. It indicates that the γ′ phase parameters could be used to evaluate the microdamage of service blades, which has great significance for service reliability of the turbine machinery.
机译：在本文中，进行了微观分析和疲劳实验，以检测600 h维修后涡轮叶片的损坏程度并确定可靠的维修时间。首先，将几个维修刀片切成不同横截面的切片，并进行显微镜检查。发现γ′相颗粒略微变粗，并且γ′相参数随温度和应力分布而变化。然后，在服务刀片上进行了疲劳测试，以模拟实际工作条件。测试结果表明，在实际飞行过程中，经过600小时的保养后，刀片将再工作3596小时，直至失效。最终的断裂主要是由疲劳，蠕变和氧化的相互作用引起的。此外，与未经疲劳试验的维修叶片相比，γ′相参数变化明显。这表明γ′相参数可用于评估维修叶片的微损伤，这对涡轮机械的维修可靠性具有重要意义。

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  • 作者

    Shi Duoqi; Wang Chan; Yang Xiaoguang; Li Shaolin;

  • 作者单位

    School of Energy and Power Engineering, Beihang University, Beijing, China,Collaborative Innovation Center of Advanced Aero-Engine, Beijing, China;

    School of Energy and Power Engineering, Beihang University, Beijing, China;

    School of Energy and Power Engineering, Beihang University, Beijing, China,Collaborative Innovation Center of Advanced Aero-Engine, Beijing, China,School of Aircraft Engineering, Nanchang Hangkong University, Nanchang, China;

    School of Energy and Power Engineering, Beihang University, Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    coarsening; fatigue; fracture analysis; microdamage; turbine blade;

    机译：粗化疲劳;断裂分析微损伤涡轮叶片;

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