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Effect of Long-Term Aging on Microstructure Evolution and Stress Rupture Properties of Ni-Based Single Crystal Superalloy
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    Abstract:

    The effect of long-term aging on microstructure and creep properties of a single crystal Ni-based superalloy was investigated. The results show that the g ¢ phase remains cubic distribution after aging at 800 oC for 1000 h; the g ¢ phase gradually connects and rafts after aging at 980 oC for 1000 h or at 1010 oC for 500 h. The μ phase precipitates in the form of needles and granules when aged at 980 oC for more than 500 h or at 1010 oC for more than 100 h; the μ phase gradually increases with the aging time prolonging at 980 oC, while it first increases and then decreases when aged at 1010 oC. The creep lives of the alloy change a little after long-term aging at 800 oC, while the lives decrease with increasing of aging time and temperatures at 980 and 1010 oC.

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[Wen Tao, Li Jinguo, Liu Lirong, Chen Lijia, Jin Tao. Effect of Long-Term Aging on Microstructure Evolution and Stress Rupture Properties of Ni-Based Single Crystal Superalloy[J]. Rare Metal Materials and Engineering,2012,41(2):230~234.]
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  • Received:February 14,2011