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| The creep rupture properties of a low Re content second-generation directionally solidified superalloy DZ59 |
| ZHAO Tan1;2; ZHANG Yun2; CHEN Guang1; LOU Langhong2 |
1.School of Materials Science and Engineering; Nanjing University of Science and Technology; Nanjing 210094
2.Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016 |
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Cite this article:
ZHAO Tan ZHANG Yun CHEN Guang LOU Langhong. The creep rupture properties of a low Re content second-generation directionally solidified superalloy DZ59. Chin J Mater Res, 2009, 23(2): 158-164.
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Abstract Assisted by the advanced LMC process and an optimum composition design, a highperformance second-generation directionally solidified superalloy DZ59 with low Re content has been developed. The high temperature creep properties of the superalloy are better than first-generation single crystal alloys and is close to the level of second-generation single crystal alloys. The microstructure and creep rupture feature of the DZ59 alloy have been analysed in detail by SEM and TEM. The SGRZ was first discovered in the second-generation directionally solidified superalloys. The results showed that SGRZ is controlled by the temperature and stress. Because SGRZ increases the area of transverse grain boundary, creep voids may initiate and propagate in the SGRZ location under high stress.
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Received: 17 October 2008
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