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| Experimental Investigation on Vibration Frequency of DD5 Superalloy Single Crystal Blades |
| SUN Hongyuan 1, 2 , MA Dexin 1, 2 , GONG Xiaoyi 2 , ZHAO Yunxing 1, 2 , YUAN Yingying 2 , WEI Bing 2 |
1. Powder Metallurgy Research Institute，Central South University, Changsha 410083, China;
2. Wedge Central South Research Institute Co., Ltd., Shenzhen 518045, China |
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Abstract In the present work, two types of single crystal (SC) blades using second generation superalloys DD5 were directionally solidified under industrial conditions. As one of the important material properties, the vibration frequency of the blades were measured and analyzed. It was found that clearly higher vibration frequency was exhibited in the blades with larger primary orientation deviation. In comparison, it was little affected by secondary orientation deviation. Another important factor influencing the vibration frequency is the airfoil constitution, instead of the total weight of a blade. In order to strictly control the blade vibration frequency, the airfoil constitution should be further optimized in the design, and the deviation of the primary crystal orientation of the blades should be minimized during the casting process.
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2022, 
