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| Research Status of Cast Mg–RE Alloy and Its Application Prospect in Aero-Engine |
| WU Guohua 1,2 , TONG Xin 1 , SUI Huaiming 3 , WEI Guangling 1 , XIAO Lü 4 |
1. National Engineering Research Center of Light Alloys Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China;
2. The State Key Lab of Metal Matrix Composite, Shanghai 200240, China;
3. Yangzhou Fengming Photoelectric New Material Co., Ltd., Yangzhou 225117, China;
4. Shanghai Aerospace Precision Machinery Institute, Shanghai 201600, China |
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Abstract Magnesium rare-earth (Mg – RE) alloys exhibit the advantages of low densities, high specific strength and specific stiffness, desirable heat resistance, and good damping properties. The application of Mg – RE alloys in the aero-engine components can effectively reduce the equipment weight and system noise, improve the load capacity and maneuverability of aircraft. In this article, the classification of cast Mg – RE alloys is first introduced with different strengthening mechanisms. Various casting processes are reviewed and their effects on the microstructure and properties of Mg – RE alloys are also analyzed. Then the requirements for the use of Mg alloys in the existing aero-engine airworthiness standards and general standards are summarized, following by the application status of casting Mg – RE alloys in aero-engine and some other aerospace components at home and abroad. Finally, the problems and development trends of Mg–RE alloys used in aero-engine are discussed according to the actual engineering application requirements.
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2022, 
