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| MICROSTRUCTURAL CHARACTERIZATION OF A Ru-CONTAINING SINGLE CRYSTAL NICKEL-BASED SUPERALLOY |
| TAN Xipeng1,2, LIU Jinlai1, SONG Xiaoping1, JIN Tao1, SUN Xiaofeng1, HU Zhuangqi1 |
1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
2. Graduate University of Chinese Academy of Sciences, Beijing 100049 |
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Cite this article:
TAN Xipeng, LIU Jinlai, SONG Xiaoping, JIN Tao, SUN Xiaofeng, HU Zhuangqi. MICROSTRUCTURAL CHARACTERIZATION OF A Ru-CONTAINING SINGLE CRYSTAL NICKEL-BASED SUPERALLOY. Acta Metall Sin, 2012, 48(5): 569-574.
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Abstract The microstructure of a Ru--containing single crystal nickel-based superalloy, which is a potential fourth generation single crystal nickel-based superalloy heat treated, has been investigated. The X--ray diffraction (XRD) results indicate that this single crystal superalloy is not a perfect monocrystal, which is comprised of many subgrains with an average neighboring misorientation difference about 0.5° and the maximum misorientation deviation about 3°; and each subgrain includes large numbers of mosaic structures with misorientation difference of 0.1°---0.2° between each other. It is found that the microstructure of the heat treated alloy is of heterogeneity, where the volume fraction of γ' phase increases and the γ' lattice misfit decreases. It is shown that the average size of γ' phase is 0.39 μm, the average γ' volume fraction 70% and the average γ' lattice misfit --2.0×10$-3. The evolution of this microstructure was also briefly described.
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Received: 09 October 2011
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| Fund: Project supported by the National Basic Research Program of China |
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