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首页> 外文会议>18th International IFHTSE congress >Morphology of γ' Precipitates in a First Stage Low Pressure Turbine Blade of a Ni-Based Superalloy after Service and after Following Aging
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Morphology of γ' Precipitates in a First Stage Low Pressure Turbine Blade of a Ni-Based Superalloy after Service and after Following Aging

机译：服役后及时效后，镍基高温合金的第一级低压涡轮叶片中γ'沉淀的形貌

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摘要

To estimate the temperature distribution, stress distribution, and stress direction in a blade in service, the morphology of γ' precipitates in Ni-based superalloy serviced in the first stage low pressure turbine (1st LPT) blade of a jet engine was investigated before and after aging. Using a field emission scanning electron microscope, microstructures were observed in forty portions of the blade. Most of the γ' precipitates remained cuboidal in the serviced blade. Many secondary γ' precipitates were observed in the γ' matrix at the root part. In contrast, there were no secondary ? precipitates at the leading edge of the tip part. After simple aging, low-completion rafted γ/γ' structures appeared on the suction side of the 70 mm part, while in other portions, coarsening of the γ' precipitates was observed. Therefore, the leading edge of the 1st LPT blade tip was exposed to the highest temperatures in service. However, the stresses were extremely low in all portions of the blade.
机译：为了估算使用中的叶片的温度分布，应力分布和应力方向，研究了在喷气发动机的第一级低压涡轮（1st LPT）叶片中使用的镍基高温合金中γ'析出物的形态。老化后。使用场发射扫描电子显微镜，在叶片的四十部分中观察到微结构。大部分γ'沉淀物在维修叶片中仍为立方形。在根部的γ'基质中观察到许多次生的γ'沉淀。相反，没有中学？沉淀在尖端部分的前缘。经过简单的时效处理后，在70毫米部分的吸力侧出现了低完成量的筏式γ/γ'结构，而在其他部分，观察到了γ'沉淀的粗化。因此，在使用中，第一个LPT刀片尖端的前边缘暴露在最高温度下。但是，叶片的所有部分的应力都非常低。

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