Research progress of aero-engine blade materials and anti-fatigue grinding technology

• Main Authors: HUANG Yun, LI Shaochuan, XIAO Guijian, CHEN Benqiang, ZHANG Youdong, HE Yi, SONG Kangkang
• Format: Article
• Language: zho
• Published: Journal of Aeronautical Materials 2021-08-01
• Series: Journal of Aeronautical Materials
• Subjects: aviation metal materials; anti-fatigue manufacturing; composite materials; aero-engine blade; surface integrity; grinding
• Online Access: http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2021.000058

With the development of advanced aviation engines in the direction of high thrust-to-weight ratio and lightweight, a series of lightweight aviation materials such as titanium alloys, nickel-based high-temperature alloys, and ceramic-based composite materials have emerged and been widely used for the key components in the aerospace field, and have also become the main production materials for aero-engine blades. However, due to the stress concentration sensitivity of carbide and the anisotropy and brittle mechanism of composite materials, the fatigue failure problem is gradually highlighted. Existing studies show that the fatigue resistance performance of aero-engine blades has important relationship with its processing process, which in turn affects the service performance and service life of the equipment. Grinding, as the final material removal process for aero-engine blades, directly determines the final surface integrity and fatigue resistance of the blades while obtaining precise profiles. In order to understand the characteristics of blades processed by new lightweight aviation materials, and provide guidance for the processing of aero-engine blades for optimization of fatigue performance, the application of typical aero-engine blade materials and the research status of anti-fatigue grinding technology are summarized. Firstly, the characteristics of typical lightweight and high-strength aeronautical materials and their application in the production of aero-engine blades are briefly described. Secondly, the method of high surface integrity grinding and the key technology of anti-fatigue processing of aero-engine blades are analyzed. Finally, the research on anti-fatigue grinding of aero-engine blades is prospected.